##### Table of Contents





UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q



|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the Quarterly Period Ended September 30, 2010



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

Commission File Number: 1-10777

Ambac Financial Group, Inc.

(Debtor-in-possession as of November 8,
2010)

(Exact name of Registrant as specified in its charter)



|                                          |  |                                     
|----------------------------------------- |  | ------------------------------------
|Delaware                                  |  | 13-3621676                          
|(State of incorporation)                  |  | (I.R.S. employer identification no.)
|                                          | 
|One State Street Plaza New York, New York |  | 10004                               
|(Address of principal executive offices)  |  | (Zip code)                          

(212)
668-0340

(Registrants telephone number, including area code)

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90
days.    Yes  x    No   ̈

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every
Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post
such files).    Yes   ̈    No   ̈

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller
reporting company. See definition of large accelerated filer, accelerated filer, and smaller reporting company in Rule 12b-2 of the Exchange Act): (Check one):



|                        |  |   |  |                           |  |  
|----------------------- |  | - |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈ |  | Accelerated filer         |  | x
|                        |  |   | 
|Non-accelerated filer   |  |  ̈ |  | Smaller reporting company |  |  ̈

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  x

As of November 12, 2010, 302,112,225 shares of Common Stock, par value $0.01 per share, (net of 5,904,539 treasury shares) of the
Registrant were outstanding.









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##### Table of Contents

Ambac Financial Group, Inc. and Subsidiaries

INDEX





|                             |  |                                                                                                             |     |  |     | 
|---------------------------- |  | ----------------------------------------------------------------------------------------------------------- | --- |  | --- | 
|                             |  | PAGE                                                                                                        |    
|PART I FINANCIAL INFORMATION |  |                                                                                                             |     | 
|                             |  |                                                                                                            
|Item 1.                      |  | Financial Statements of Ambac Financial Group, Inc. and Subsidiaries                                        |     |  |     | 
|                             |  |                                                                                                            
|                             |  | Consolidated Balance Sheets  September 30, 2010 (unaudited) and December 31, 2009                          |     |  | 3   | 
|                             |  |                                                                                                            
|                             |  | Consolidated Statements of Operations (unaudited)  three and nine months ended September 30, 2010 and 2009 |     |  | 4   | 
|                             |  |                                                                                                            
|                             |  | Consolidated Statements of Stockholders Equity (unaudited)  nine months ended September 30, 2010 and 2009 |     |  | 5   | 
|                             |  |                                                                                                            
|                             |  | Consolidated Statements of Cash Flows (unaudited)  nine months ended September 30, 2010 and 2009           |     |  | 6   | 
|                             |  |                                                                                                            
|                             |  | Notes to Unaudited Consolidated Financial Statements                                                        |     |  | 7   | 
|                             |  |                                                                                                            
|Item 2.                      |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                       |     |  | 86  | 
|                             |  |                                                                                                            
|Item 3.                      |  | Quantitative and Qualitative Disclosures About Market Risk                                                  |     |  | 135 | 
|                             |  |                                                                                                            
|Item 4.                      |  | Controls and Procedures                                                                                     |     |  | 139 | 
|                             | 
|PART II OTHER INFORMATION    |  |                                                                                                             |     | 
|                             |  |                                                                                                            
|Item 1.                      |  | Legal Proceedings                                                                                           |     |  | 140 | 
|                             |  |                                                                                                            
|Item 1A.                     |  | Risk Factors                                                                                                |     |  | 147 | 
|                             |  |                                                                                                            
|Item 2.                      |  | Unregistered Sales of Equity Securities and Use of Proceeds                                                 |     |  | 155 | 
|                             |  |                                                                                                            
|Item 6.                      |  | Exhibits                                                                                                    |     |  | 156 | 
|                             | 
|SIGNATURES                   |  |                                                                                                             | 157 | 
|                             | 
|INDEX TO EXHIBITS            |  |                                                                                                             | 158 | 



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##### Table of Contents



PART 1  FINANCIAL INFORMATION

Item 1  Financial Statements of Ambac Financial Group, Inc. and Subsidiaries

Ambac Financial Group Inc. and Subsidiaries

Consolidated Balance Sheets



|                                                                                                                       |  |                   |            |   |                  |   |            |  
|---------------------------------------------------------------------------------------------------------------------- |  | ----------------- | ---------- | - | ---------------- | - | ---------- | -
|(Dollars in Thousands)                                                                                                 |  | September 30,2010 |            |   | December 31,2009 |  
|                                                                                                                       |  | (unaudited)       |            |   |                  |  
|Assets:                                                                                                                |  |                   |            |   |                  |   |            |  
|Investments:                                                                                                           |  |                   |            |   |                  |   |            |  
|Fixed income securities, at fair value (amortized cost of $5,599,075 in 2010 and $7,605,565 in 2009)                   |  | $                 | 5,968,020  |   |                  | $ | 7,572,570  |  
|Fixed income securities pledged as collateral, at fair value (amortized cost of $190,453 in 2010 and $164,356 in
2009) |  |                   | 194,387    |   |                  |   | 167,366    |  
|Short-term investments, (amortized cost of $617,748 in 2010 and $962,007 in 2009)                                      |  |                   | 617,748    |   |                  |   | 962,007    |  
|Other (cost of $100 in 2010 and $1,278 in 2009)                                                                        |  |                   | 100        |   |                  |   | 1,278      |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Total investments                                                                                                      |  |                   | 6,780,255  |   |                  |   | 8,703,221  |  
|                                                                                                                       |  |                  
|Cash and cash equivalents                                                                                              |  |                   | 69,673     |   |                  |   | 112,079    |  
|Receivable for securities sold                                                                                         |  |                   | 22,578     |   |                  |   | 3,106      |  
|Investment income due and accrued                                                                                      |  |                   | 37,346     |   |                  |   | 73,062     |  
|Premium receivables                                                                                                    |  |                   | 2,802,811  |   |                  |   | 3,718,158  |  
|Reinsurance recoverable on paid and unpaid losses                                                                      |  |                   | 126,458    |   |                  |   | 78,115     |  
|Deferred ceded premium                                                                                                 |  |                   | 318,616    |   |                  |   | 500,804    |  
|Subrogation recoverable                                                                                                |  |                   | 1,222,216  |   |                  |   | 902,612    |  
|Deferred taxes                                                                                                         |  |                   |           |   |                  |   | 11,250     |  
|Current taxes                                                                                                          |  |                   |           |   |                  |   | 421,438    |  
|Deferred acquisition costs                                                                                             |  |                   | 251,971    |   |                  |   | 279,704    |  
|Loans                                                                                                                  |  |                   | 20,999     |   |                  |   | 80,410     |  
|Derivative assets                                                                                                      |  |                   | 298,757    |   |                  |   | 496,494    |  
|Other assets                                                                                                           |  |                   | 216,644    |   |                  |   | 229,299    |  
|Variable interest entity assets:                                                                                       |  |                   |            |   |                  |   |            |  
|Fixed income securities, at fair value                                                                                 |  |                   | 1,939,492  |   |                  |   | 525,947    |  
|Restricted cash                                                                                                        |  |                   | 1,952      |   |                  |   | 1,151      |  
|Investment income due and accrued                                                                                      |  |                   | 1,230      |   |                  |   | 4,133      |  
|Loans (includes $17,007,648 and $2,428,352 at fair value)                                                              |  |                   | 17,201,665 |   |                  |   | 2,635,961  |  
|Derivative assets                                                                                                      |  |                   | 4,362      |   |                  |   | 109,411    |  
|Other assets                                                                                                           |  |                   | 11,214     |   |                  |   | 12         |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Total assets                                                                                                           |  | $                 | 31,328,239 |   |                  | $ | 18,886,367 |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Liabilities and Stockholders Deficit:                                                                                 |  |                   |            |   |                  |   |            |  
|Liabilities:                                                                                                           |  |                   |            |   |                  |   |            |  
|Unearned premiums                                                                                                      |  | $                 | 4,442,271  |   |                  | $ | 5,687,114  |  
|Losses and loss expense reserve                                                                                        |  |                   | 5,510,541  |   |                  |   | 4,771,684  |  
|Ceded premiums payable                                                                                                 |  |                   | 182,725    |   |                  |   | 291,843    |  
|Obligations under investment and payment agreements                                                                    |  |                   | 814,389    |   |                  |   | 1,177,406  |  
|Obligations under investment repurchase agreements                                                                     |  |                   | 101,807    |   |                  |   | 113,527    |  
|Current taxes                                                                                                          |  |                   | 22,449     |   |                  |   |           |  
|Long-term debt                                                                                                         |  |                   | 1,823,327  |   |                  |   | 1,631,556  |  
|Accrued interest payable                                                                                               |  |                   | 90,975     |   |                  |   | 47,125     |  
|Derivative liabilities                                                                                                 |  |                   | 486,878    |   |                  |   | 3,536,858  |  
|Other liabilities                                                                                                      |  |                   | 138,301    |   |                  |   | 248,655    |  
|Payable for securities purchased                                                                                       |  |                   | 2,486      |   |                  |   | 2,074      |  
|Variable interest entity liabilities:                                                                                  |  |                   |            |   |                  |   |            |  
|Accrued interest payable                                                                                               |  |                   | 651        |   |                  |   | 3,482      |  
|Long-term debt (includes $17,130,379 and $2,789,556 at fair value)                                                     |  |                   | 17,335,034 |   |                  |   | 3,008,628  |  
|Derivative liabilities                                                                                                 |  |                   | 1,581,681  |   |                  |   |           |  
|Other liabilities                                                                                                      |  |                   | 12,304     |   |                  |   | 60         |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Total liabilities                                                                                                      |  |                   | 32,545,819 |   |                  |   | 20,520,012 |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Stockholders deficit:                                                                                                 |  |                   |            |   |                  |   |            |  
|Ambac Financial Group, Inc.:                                                                                           |  |                   |            |   |                  |   |            |  
|Preferred stock                                                                                                        |  |                   |           |   |                  |   |           |  
|Common stock                                                                                                           |  |                   | 3,080      |   |                  |   | 2,944      |  
|Additional paid-in capital                                                                                             |  |                   | 2,186,372  |   |                  |   | 2,172,656  |  
|Accumulated other comprehensive income (loss)                                                                          |  |                   | 347,738    |   |                  |   | (24,827    | )
|Accumulated deficit                                                                                                    |  |                   | (3,978,701 | ) |                  |   | (3,878,015 | )
|Common stock held in treasury at cost                                                                                  |  |                   | (430,600   | ) |                  |   | (560,543   | )
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Total Ambac Financial Group, Inc. stockholders deficit                                                                |  |                   | (1,872,111 | ) |                  |   | (2,287,785 | )
|Noncontrolling interest                                                                                                |  |                   | 654,531    |   |                  |   | 654,140    |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Total stockholders deficit                                                                                            |  |                   | (1,217,580 | ) |                  |   | (1,633,645 | )
|                                                                                                                       |  |                   |            |   |                  |   |            |  
|Total liabilities and stockholders deficit                                                                            |  | $                 | 31,328,239 |   |                  | $ | 18,886,367 |  
|                                                                                                                       |  |                   |            |   |                  |   |            |  

See accompanying Notes to Unaudited Consolidated Financial Statements.



3



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##### Table of Contents

Ambac Financial Group Inc. and Subsidiaries

Consolidated Statements of Operations

(Unaudited)



|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|--------------------------------------------------------------------------------------------------- |  | ------------------------------- | ----------- | - | ------------------------------ | - | ----------- | ---- |  | - | ----------- | - |  | - | ----------- | -
|                                                                                                    |  | Three Months
EndedSeptember 30, |             |   | Nine Months
EndedSeptember 30, |  
|(Dollars in Thousands, Except Share Data)                                                           |  | 2010                            |             |   | 2009                           |   |             | 2010 |  |   | 2009        |  
|Revenues:                                                                                           |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Financial Guarantee:                                                                                |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net premiums earned                                                                                 |  | $                               | 143,085     |   |                                | $ | 238,401     |      |  | $ | 435,321     |   |  | $ | 612,945     |  
|Net investment income                                                                               |  |                                 | 69,840      |   |                                |   | 137,645     |      |  |   | 256,438     |   |  |   | 364,026     |  
|Other-than-temporary impairment losses:                                                             |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Total other-than-temporary impairment losses                                                        |  |                                 | (8,461      | ) |                                |   | (32,529     | )    |  |   | (49,706     | ) |  |   | (1,452,664  | )
|Portion of loss recognized in other comprehensive income                                            |  |                                 | 1,877       |   |                                |   |            |      |  |   | 4,286       |   |  |   |            |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net other-than-temporary impairment losses recognized in earnings                                   |  |                                 | (6,584      | ) |                                |   | (32,529     | )    |  |   | (45,420     | ) |  |   | (1,452,664  | )
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net realized investment gains                                                                       |  |                                 | 2,053       |   |                                |   | 86,916      |      |  |   | 75,473      |   |  |   | 93,075      |  
|Change in fair value of credit derivatives:                                                         |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Realized gains (losses) and other settlements                                                       |  |                                 | 4,862       |   |                                |   | (732,857    | )    |  |   | (2,762,509  | ) |  |   | (731,287    | )
|Unrealized gains                                                                                    |  |                                 | 4,550       |   |                                |   | 2,865,761   |      |  |   | 2,806,963   |   |  |   | 4,411,004   |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net change in fair value of credit derivatives                                                      |  |                                 | 9,412       |   |                                |   | 2,132,904   |      |  |   | 44,454      |   |  |   | 3,679,717   |  
|Other income                                                                                        |  |                                 | 186,859     |   |                                |   | 268,836     |      |  |   | 100,713     |   |  |   | 309,780     |  
|Income (loss) on variable interest entities                                                         |  |                                 | 26,377      |   |                                |   | 41,096      |      |  |   | (504,873    | ) |  |   | 41,140      |  
|Financial Services:                                                                                 |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Investment income                                                                                   |  |                                 | 8,425       |   |                                |   | 18,454      |      |  |   | 26,554      |   |  |   | 58,342      |  
|Derivative products                                                                                 |  |                                 | (78,368     | ) |                                |   | (222,450    | )    |  |   | (207,552    | ) |  |   | (280,868    | )
|Other-than-temporary impairment losses:                                                             |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Total other-than-temporary impairment losses                                                        |  |                                 |            |   |                                |   | (11,660     | )    |  |   | (3,079      | ) |  |   | (283,858    | )
|Portion of loss recognized in other comprehensive income                                            |  |                                 |            |   |                                |   |            |      |  |   |            |   |  |   |            |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net other-than-temporary impairment losses recognized in earnings                                   |  |                                 |            |   |                                |   | (11,660     | )    |  |   | (3,079      | ) |  |   | (283,858    | )
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net realized investment gains                                                                       |  |                                 | 464         |   |                                |   | 28,109      |      |  |   | 67,706      |   |  |   | 142,345     |  
|Net change in fair value of total return swap contracts                                             |  |                                 |            |   |                                |   | 6,902       |      |  |   |            |   |  |   | 18,573      |  
|Net mark-to-market (losses) gains on non-trading derivative contracts                               |  |                                 |            |   |                                |   | (6,907      | )    |  |   | (14,295     | ) |  |   | 783         |  
|Corporate and Other:                                                                                |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Other income                                                                                        |  |                                 | 114         |   |                                |   | 1,109       |      |  |   | 1,575       |   |  |   | 33,325      |  
|Net realized (losses) gains                                                                         |  |                                 | (521        | ) |                                |   |            |      |  |   | 10,172      |   |  |   | 33          |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Total revenues                                                                                      |  |                                 | 361,156     |   |                                |   | 2,686,826   |      |  |   | 243,187     |   |  |   | 3,336,694   |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Expenses:                                                                                           |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Financial Guarantee:                                                                                |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Losses and loss expenses                                                                            |  |                                 | 165,396     |   |                                |   | 459,213     |      |  |   | 577,874     |   |  |   | 2,429,890   |  
|Underwriting and operating expenses                                                                 |  |                                 | 41,200      |   |                                |   | 28,012      |      |  |   | 150,627     |   |  |   | 133,466     |  
|Interest expense                                                                                    |  |                                 | 27,492      |   |                                |   |            |      |  |   | 34,378      |   |  |   |            |  
|Financial Services:                                                                                 |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Interest from investment and payment agreements                                                     |  |                                 | 3,951       |   |                                |   | 6,433       |      |  |   | 13,742      |   |  |   | 27,533      |  
|Other expenses                                                                                      |  |                                 | 3,460       |   |                                |   | 3,316       |      |  |   | 10,211      |   |  |   | 10,808      |  
|Corporate and Other:                                                                                |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Interest                                                                                            |  |                                 | 29,878      |   |                                |   | 29,918      |      |  |   | 89,634      |   |  |   | 89,601      |  
|Other expenses                                                                                      |  |                                 | 13,695      |   |                                |   | 5,975       |      |  |   | 38,288      |   |  |   | 6,659       |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Total expenses                                                                                      |  |                                 | 285,072     |   |                                |   | 532,867     |      |  |   | 914,754     |   |  |   | 2,697,957   |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Pre-tax income (loss) from continuing operations                                                    |  |                                 | 76,084      |   |                                |   | 2,153,959   |      |  |   | (671,567    | ) |  |   | 638,737     |  
|Provision (benefit) for income taxes                                                                |  |                                 | 65          |   |                                |   | (34,284     | )    |  |   | 50          |   |  |   | 1,211,477   |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net income (loss)                                                                                   |  | $                               | 76,019      |   |                                | $ | 2,188,243   |      |  | $ | (671,617    | ) |  | $ | (572,740    | )
|Less: net income (loss) attributable to the noncontrolling interest                                 |  |                                 | 13          |   |                                |   | (14         | )    |  |   | (13         | ) |  |   | (16         | )
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net income (loss) attributable to Ambac Financial Group, Inc.                                       |  | $                               | 76,006      |   |                                | $ | 2,188,257   |      |  | $ | (671,604    | ) |  | $ | (572,724    | )
|                                                                                                    |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Net income (loss) per share attributable to Ambac Financial Group, Inc. common shareholders         |  | $                               | 0.25        |   |                                | $ | 7.58        |      |  | $ | (2.29       | ) |  | $ | (1.99       | )
|Net income (loss) per diluted share attributable to Ambac Financial Group, Inc. common shareholders |  | $                               | 0.25        |   |                                | $ | 7.58        |      |  | $ | (2.29       | ) |  | $ | (1.99       | )
|Weighted-average number of common shares outstanding:                                               |  |                                 |             |   |                                |   |             |      |  |   |             |   |  |   |             |  
|Basic                                                                                               |  |                                 | 302,177,506 |   |                                |   | 288,770,269 |      |  |   | 293,542,268 |   |  |   | 287,647,272 |  
|Diluted                                                                                             |  |                                 | 302,177,506 |   |                                |   | 288,770,269 |      |  |   | 293,542,268 |   |  |   | 287,647,272 |  

See accompanying Notes
to Unaudited Consolidated Financial Statements.



4



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##### Table of Contents

Ambac Financial Group Inc. and Subsidiaries

Consolidated Statements of Stockholders Equity

(Unaudited)



|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|----------------------------------------------------------------------------- |  | ----- | ------------------ | - | -------------------------- | ----------------------------------- | --------- | --------------------------- | -------------- | - | ---------- | ----------- |  | - | -------------- | - |  | ----------------------------------- | - |  | ---------------------- | - | ----- |  |  | - | --------- |  |  | - | -------- | - |  | - | -------- | -
|                                                                              |  | Total |                    |   | Comprehensive(Loss) Income |                                     |           | Ambac Financial Group, Inc. |                |   |            |            
|                                                                              |  |       | AccumulatedDeficit |   |                            | AccumulatedOtherComprehensiveIncome |           |                             | PreferredStock |   |            | CommonStock |  |   | Paid-inCapital |   |  | CommonStock Held inTreasury, atCost |   |  | NoncontrollingInterest |  
|Balance at January 1, 2010                                                    |  | $     | (1,633,645         | ) |                            |                                     |           |                             |                | $ | (3,878,015 | )           |  | $ | (24,827        | ) |  | $                                   |  |  |                        | $ | 2,944 |  |  | $ | 2,172,656 |  |  | $ | (560,543 | ) |  | $ | 654,140  |  
|Comprehensive loss:                                                           |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Net loss                                                                      |  |       | (671,617           | ) |                            | $                                   | (671,617  | )                           |                |   | (671,604   | )           |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   | (13      | )
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Other comprehensive loss:                                                     |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Unrealized gains on securities, net of deferred income taxes of $10,495       |  |       | 389,362            |   |                            |                                     | 389,362   |                             |                |   |            |             |  |   | 389,362        |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Loss on derivative hedges, net of deferred income taxes of $755               |  |       | (1,881             | ) |                            |                                     | (1,881    | )                           |                |   |            |             |  |   | (1,881         | ) |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Loss on foreign currency translation, net of deferred income taxes of $1,529  |  |       | (17,310            | ) |                            |                                     | (17,310   | )                           |                |   |            |             |  |   | (17,714        | ) |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   | 404      |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Other comprehensive gain                                                      |  |       | 370,171            |   |                            |                                     | 370,171   |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Total comprehensive loss                                                      |  | $     | (301,446           | ) |                            | $                                   | (301,446  | )                           |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Adjustment to initially apply ASU 2009-17                                     |  |       | 705,046            |   |                            |                                     |           |                             |                |   | 702,042    |             |  |   | 3,004          |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Dividends declared  subsidiary shares to non-controlling interest            |  |       | (817               | ) |                            |                                     |           |                             |                |   | (817       | )           |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Issuance of stock                                                             |  |       | 9,618              |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   | 136   |  |  |   | 9,482     |  |  |   |          |   |  |   |          |  
|Stock-based compensation                                                      |  |       | (126,279           | ) |                            |                                     |           |                             |                |   | (130,307   | )           |  |   | (206           | ) |  |                                     |   |  |                        |   |       |  |  |   | 4,234     |  |  |   |          |   |  |   |          |  
|Cost of shares acquired                                                       |  |       | (341               | ) |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   | (341     | ) |  |   |          |  
|Shares issued under equity plans                                              |  |       | 130,284            |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   | 130,284  |   |  |   |          |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Balance at September 30, 2010                                                 |  | $     | (1,217,580         | ) |                            |                                     |           |                             |                | $ | (3,978,701 | )           |  | $ | 347,738        |   |  | $                                   |  |  |                        | $ | 3,080 |  |  | $ | 2,186,372 |  |  | $ | (430,600 | ) |  | $ | 654,531  |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Balance at January 1, 2009                                                    |  | $     | (3,089,122         | ) |                            |                                     |           |                             |                | $ | (3,550,768 | )           |  | $ | (1,670,198     | ) |  | $                                   |  |  |                        | $ | 2,944 |  |  | $ | 2,030,031 |  |  | $ | (594,318 | ) |  | $ | 693,187  |  
|Sale of subsidiary shares to noncontrolling interest                          |  |       | 100,000            |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   | 100,000  |  
|Retirement of shares issued to noncontrolling interest                        |  |       | (11,178            | ) |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   | 128,547   |  |  |   |          |   |  |   | (139,725 | )
|Comprehensive loss:                                                           |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Net loss                                                                      |  |       | (572,740           | ) |                            | $                                   | (572,740  | )                           |                |   | (572,724   | )           |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   | (16      | )
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Other comprehensive loss:                                                     |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Unrealized gains on securities, net of deferred income taxes of $869,680      |  |       | 1,717,185          |   |                            |                                     | 1,717,185 |                             |                |   |            |             |  |   | 1,717,185      |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Gain on derivative hedges, net of deferred income taxes of $170               |  |       | 315                |   |                            |                                     | 315       |                             |                |   |            |             |  |   | 315            |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Gain on foreign currency translation, net of deferred income taxes of $32,919 |  |       | 61,592             |   |                            |                                     | 61,592    |                             |                |   |            |             |  |   | 61,135         |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   | 457      |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Other comprehensive loss                                                      |  |       | 1,779,092          |   |                            |                                     | 1,779,092 |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Total comprehensive gain                                                      |  | $     | 1,206,352          |   |                            | $                                   | 1,206,352 |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Adjustment to initially apply ASC 944-20-65-1                                 |  |       | (381,716           | ) |                            |                                     |           |                             |                |   | (381,716   | )           |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Adjustment to initially apply ASC 320-10-65-1                                 |  |       |                   |   |                            |                                     |           |                             |                |   | 102,065    |             |  |   | (102,065       | ) |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Dividends declared  subsidiary shares to non-controlling interest            |  |       | (12,148            | ) |                            |                                     |           |                             |                |   | (12,148    | )           |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Stock-based compensation                                                      |  |       | (19,552            | ) |                            |                                     |           |                             |                |   | (32,822    | )           |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   | 13,270    |  |  |   |          |   |  |   |          |  
|Cost of shares acquired                                                       |  |       | (115               | ) |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   | (115     | ) |  |   |          |  
|Shares issued under equity plans                                              |  |       | 32,938             |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   | 32,938   |   |  |   |          |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  
|Balance at September 30, 2009                                                 |  | $     | (2,174,541         | ) |                            |                                     |           |                             |                | $ | (4,448,113 | )           |  | $ | 6,372          |   |  | $                                   |  |  |                        | $ | 2,944 |  |  | $ | 2,171,848 |  |  | $ | (561,495 | ) |  | $ | 653,903  |  
|                                                                              |  |       |                    |   |                            |                                     |           |                             |                |   |            |             |  |   |                |   |  |                                     |   |  |                        |   |       |  |  |   |           |  |  |   |          |   |  |   |          |  

See accompanying Notes to Unaudited Consolidated Financial Statements.



5



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##### Table of Contents

Ambac Financial Group Inc. and Subsidiaries

Consolidated Statements of Cash Flows

(Unaudited)



|                                                                            |  |                                |            |   |      |   |            |  
|--------------------------------------------------------------------------- |  | ------------------------------ | ---------- | - | ---- | - | ---------- | -
|                                                                            |  | Nine Months EndedSeptember
30, |           
|(Dollars in Thousands)                                                      |  | 2010                           |            |   | 2009 |  
|                                                                            |  |                                |            |   |      |   |            |  
|Cash flows from operating activities:                                       |  |                                |            |   |      |   |            |  
|Net loss attributable to common shareholders                                |  | $                              | (671,604   | ) |      | $ | (572,724   | )
|Noncontrolling interest in subsidiaries earnings                           |  |                                | (13        | ) |      |   | (16        | )
|                                                                            |  |                                |            |   |      |   |            |  
|Net loss                                                                    |  | $                              | (671,617   | ) |      | $ | (572,740   | )
|Adjustments to reconcile net loss to net cash used in operating activities: |  |                                |            |   |      |   |            |  
|Depreciation and amortization                                               |  |                                | 2,686      |   |      |   | 2,223      |  
|Amortization of bond premium and discount                                   |  |                                | (103,445   | ) |      |   | (143,772   | )
|Share-based compensation                                                    |  |                                | 4,250      |   |      |   | 13,315     |  
|Current income taxes                                                        |  |                                | 443,887    |   |      |   | 243,236    |  
|Deferred income taxes                                                       |  |                                |           |   |      |   | 1,243,586  |  
|Deferred acquisition costs                                                  |  |                                | 27,733     |   |      |   | (100,610   | )
|Unearned premiums, net                                                      |  |                                | (1,062,655 | ) |      |   | (436,753   | )
|Loss and loss expense, net                                                  |  |                                | 370,910    |   |      |   | 1,435,179  |  
|Ceded premiums payable                                                      |  |                                | (109,118   | ) |      |   | (349,535   | )
|Investment income due and accrued                                           |  |                                | 35,716     |   |      |   | 46,636     |  
|Premium receivables                                                         |  |                                | 915,347    |   |      |   | 606,083    |  
|Accrued interest payable                                                    |  |                                | 43,850     |   |      |   | (23,739    | )
|Net mark-to-market (gains) losses                                           |  |                                | (2,792,668 | ) |      |   | (4,430,360 | )
|Net realized investment gains                                               |  |                                | (153,351   | ) |      |   | (235,453   | )
|Other-than-temporary impairment charges                                     |  |                                | 48,499     |   |      |   | 1,736,522  |  
|Variable interest entity activities                                         |  |                                | 504,873    |   |      |   | 41,140     |  
|Other, net                                                                  |  |                                | 330,273    |   |      |   | (345,082   | )
|                                                                            |  |                                |            |   |      |   |            |  
|Net cash used in operating activities                                       |  |                                | (2,164,830 | ) |      |   | (1,270,124 | )
|                                                                            |  |                                |            |   |      |   |            |  
|Cash flows from investing activities:                                       |  |                                |            |   |      |   |            |  
|Proceeds from sales of bonds                                                |  |                                | 2,349,427  |   |      |   | 3,014,573  |  
|Proceeds from matured bonds                                                 |  |                                | 584,365    |   |      |   | 497,216    |  
|Purchases of bonds                                                          |  |                                | (880,863   | ) |      |   | (1,576,127 | )
|Change in short-term investments                                            |  |                                | 344,259    |   |      |   | 109,285    |  
|Loans, net                                                                  |  |                                | 59,412     |   |      |   | 385,199    |  
|Change in swap collateral receivable                                        |  |                                | 24,248     |   |      |   | 445,435    |  
|Other, net                                                                  |  |                                | 12,324     |   |      |   | (10,127    | )
|                                                                            |  |                                |            |   |      |   |            |  
|Net cash provided by investing activities                                   |  |                                | 2,493,172  |   |      |   | 2,865,454  |  
|                                                                            |  |                                |            |   |      |   |            |  
|Cash flows from financing activities:                                       |  |                                |            |   |      |   |            |  
|Dividends paid  subsidiary shares to noncontrolling interest               |  |                                | (817       | ) |      |   | (12,148    | )
|Proceeds from issuance of investment and payment agreements                 |  |                                | 1,337      |   |      |   | 53,756     |  
|Payments for investment and payment draws                                   |  |                                | (290,699   | ) |      |   | (1,643,102 | )
|Proceeds from the issuance of subsidiary shares to noncontrolling interest  |  |                                |           |   |      |   | 100,000    |  
|Retirement of subsidiary shares to noncontrolling interest                  |  |                                |           |   |      |   | (11,178    | )
|Capital issuance costs                                                      |  |                                |           |   |      |   | (297       | )
|Net cash collateral paid/received                                           |  |                                | (80,569    | ) |      |   | (40,587    | )
|                                                                            |  |                                |            |   |      |   |            |  
|Net cash used in financing activities                                       |  |                                | (370,748   | ) |      |   | (1,553,556 | )
|                                                                            |  |                                |            |   |      |   |            |  
|Net cash flow                                                               |  |                                | (42,406    | ) |      |   | 41,774     |  
|Cash and cash equivalents at January 1                                      |  |                                | 112,079    |   |      |   | 106,762    |  
|                                                                            |  |                                |            |   |      |   |            |  
|Cash and cash equivalents at September 30                                   |  | $                              | 69,673     |   |      | $ | 148,536    |  
|                                                                            |  |                                |            |   |      |   |            |  
|Supplemental disclosure of cash flow information:                           |  |                                |            |   |      |   |            |  
|Cash paid during the year for:                                              |  |                                |            |   |      |   |            |  
|Income taxes                                                                |  | $                              |           |   |      | $ |           |  
|Interest expense on long-term debt                                          |  | $                              | 61,568     |   |      | $ | 74,820     |  
|Interest on investment agreements                                           |  | $                              | 17,175     |   |      | $ | 38,436     |  



Supplemental disclosure of noncash financing activities:

The company
issued common stock upon the extinguishment of $20,311 in long-term debt. In addition, Ambac Assurance issued surplus notes in connection with settlement of credit derivative liabilities as part of the CDS commutation Settlement Agreement and
the Segregated Account of Ambac Assurance issued surplus notes as discussed in Recent Developments in Note 1 to the Unaudited Consolidated Financial Statements.

See accompanying Notes to Unaudited Consolidated Financial Statements.



6



---

##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

(Dollars in thousands, except share amounts)

(1) Background and Basis of Presentation

Ambac Financial Group, Inc., headquartered in New York City, is a holding company whose affiliates provided financial
guarantees and financial services to clients in both the public and private sectors around the world. On November 8, 2010, Ambac filed a voluntary petition for relief under Chapter 11 of the United States Bankruptcy Code (Bankruptcy
Code) in the United States Bankruptcy Court for the Southern District of New York (Bankruptcy Court). The Company will continue to operate in the ordinary course of business as debtor-in-possession under the
jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code and the orders of the Bankruptcy Court. Ambac Financial Group, Inc.s common stock trades in the over-the-counter market under ticker
symbol ABKFQ. Ambacs principal operating subsidiary, Ambac Assurance Corporation, a guarantor of public finance and structured finance obligations, has a Caa2 rating from Moodys Investors Service, Inc. and an R (regulatory intervention)
financial strength rating from Standard & Poors Ratings Services. Everspan Financial Guarantee Corp. has a CC financial strength rating from S&P and Ambac Assurance UK, Ltd. has a financial strength rating Caa2 from Moodys.

Ambacs principal business strategy going forward is to increase the residual value of its financial guarantee business
by mitigating losses on poorly performing transactions (including through the pursuit of recoveries in respect of paid claims, commutations of policies and repurchases of surplus notes issued in respect of claims) and maximizing the yield on its
investment portfolio. The Companys existing investment agreement and derivative product portfolios are in active runoff. In the course of managing the inherent risks of these portfolios during runoff, the Financial Services segment may enter
into new financial instrument transactions to the extent we are able to do so.

The financial strength rating downgrades and
regulatory actions taken to date with respect to Ambac Assurance have eliminated Ambacs ability to generate new business and will continue to negatively impact Ambacs operations and financial results. The constraints imposed upon Ambac
Assurance by the covenants made for the benefit of the Segregated Account and the Counterparties to the Settlement Agreement (as described in Recent Developments below), and the authority of the Rehabilitator (as defined below) to control the
management of the Segregated Account may limit our ability to achieve our objectives, thereby reducing the value of Ambac Assurance. Further, there can be no assurance that Ambac will be successful in realizing any of the foregoing operating
strategies. As a result of these uncertainties and the Chapter 11 Reorganization described below, management has concluded that there is substantial doubt about the ability to continue as a going concern. The accompanying financial statements do not
purport to reflect or provide for the consequences of our bankruptcy filing. In particular, the financial statements do not purport to show assets at their realizable value on a liquidation basis. The Companys financial statements as of
September 30, 2010 and December 31, 2009, and for the three and nine months ended September 30, 2010 and 2009, are prepared assuming the Company continues as a going concern and do not include any adjustment that might result from its
inability to continue as a going concern.

Recent Developments:

Chapter 11 Reorganization

On November 8, 2010 (the Petition Date), Ambac filed a voluntary petition for relief under Chapter 11 (Bankruptcy Filing) of the Bankruptcy Code in the Bankruptcy Court. The
Company will continue to operate in the ordinary course of business as debtor-in-possession under the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code and the orders of the
Bankruptcy Court.



7



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The Company was
unable to raise additional capital as an alternative to seeking bankruptcy protection and was also unable to agree to terms with an ad-hoc committee of certain senior debt holders in order to restructure its outstanding debt through a prepackaged
bankruptcy proceeding. However, Ambac, Ambac Assurance, OCI and the ad hoc committee have agreed to a non-binding term sheet that will serve as the basis for further negotiation which, if successful, may allow the Company to emerge from bankruptcy
more expeditiously. The principal issues raised in the non-binding term sheet relate to (i) the allocation of tax attributes (including, without limitation, NOLs) among the Company and its subsidiaries, including Ambac Assurance, (ii) cost
sharing agreements among the Company and its subsidiaries, and (iii) possible repurchases of outstanding securities of Ambac Assurance. As such, OCI and the Rehabilitator will participate in negotiations with respect to the non-binding term
sheet. If the negotiations do not produce an agreement among the parties, Ambac (or its creditors) could take actions which would adversely affect Ambac Assurance and/or the Segregated Account. As such, OCI may determine that it is in the best
interests of policyholders to initiate rehabilitation proceedings with respect to Ambac Assurance, either pre-emptively, or in response to any such action.

As of September 30, 2010, the Company had debt outstanding amounting to $1,622,189. The Bankruptcy Filing constituted an event of default with respect to the following debt instruments (collectively,
the Debt Documents):



| |  |  | Indenture, dated as of August 1, 1991, between the Company and The Bank of New York Mellon (as successor trustee to The Chase Manhattan Bank
(National Association)) (the 1991 Indenture), as trustee, with respect to approximately $122,189 principal and accrued and unpaid interest on outstanding debt securities in the form of 9-3/8% debentures due August 1, 2011;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | 1991 Indenture with respect to approximately $75,000 principal and accrued and unpaid interest on outstanding debt securities in the form of 7-1/2% debentures due May 1, 2023;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Indenture, dated as of August 24, 2001, between the Company and The Bank of New York Mellon (as successor trustee to JP Morgan Chase Bank) (the
2001 Indenture), as trustee, with respect to approximately $200,000 principal and accrued and unpaid interest on outstanding debt securities in the form of 5.95% debentures due February 28, 2103;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | 2001 Indenture with respect to approximately $175,000 principal and accrued and unpaid interest on outstanding debt securities in the form of 5.875%
debentures due March 24, 2103;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Indenture, dated as of April 22, 2003, between the Company and The Bank of New York Mellon (as successor trustee to JP Morgan Chase Bank), as
trustee, with respect to approximately $400,000 principal and accrued and unpaid interest on outstanding debt securities in the form of 5.95% debentures due December 5, 2035;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Indenture, dated as of February 15, 2006, as supplemented by the Supplemental Indenture, dated as of March 12, 2008, both between the Company
and The Bank of New York Mellon, as trustee, with respect to approximately $250,000 principal and accrued and unpaid interest on outstanding debt securities in the form of 9.50% senior notes due February 15, 2021; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





| |  |  | Junior Subordinated Indenture and First Supplemental Indenture, both dated as of February 12, 2007, between the Company and The Bank of New York
Mellon, as trustee, with respect to approximately $400,000 principal and accrued and unpaid interest on outstanding debt securities in the form of 6.15% Directly Issued Subordinated Capital Securities due February 15, 2037.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

As a result of the bankruptcy filing, Ambacs obligations under the debt securities described above
are accelerated. Upon the bankruptcy filing, any efforts to enforce such payment obligations under the Debt Documents are stayed pursuant to the automatic stay provisions of section 362 of the Bankruptcy Code, and the creditors rights of
enforcement in respect of the Debt Documents are subject to the applicable provisions of the Bankruptcy Code.

As a result of
the bankruptcy filing, Ambac is now required to file various documents with, and provide certain information to, the Bankruptcy Court, including statements of financial affairs, schedules of assets and liabilities and monthly operating reports in
forms prescribed by federal bankruptcy law, as well as certain financial information on an unconsolidated basis. While these documents and information accurately provide then-current information required under federal bankruptcy law, they are
nonetheless unconsolidated, unaudited and are prepared in a format different from that used in Ambacs US GAAP basis consolidated financial statements filed under the securities laws. Accordingly, Ambac believes that the substance and
format do not allow meaningful comparison with its publicly-disclosed US GAAP basis consolidated financial statements. Moreover, the materials filed with the Bankruptcy Court are not prepared for the purpose of providing a basis for an
investment decision relating to the Companys securities, or for comparison with other financial information filed with the SEC.

Shortly after the Petition Date, Ambac began notifying current or potential creditors of the Bankruptcy Filing. Subject to certain exceptions under the Bankruptcy Code, the bankruptcy filing automatically
enjoined, or stayed, the continuation of any judicial or administrative proceedings or other actions against the Company. Thus, for example, most creditor actions to obtain possession of property from Ambac, or to create, perfect or enforce any lien
against the property of Ambac, or to collect on monies owed or otherwise exercise rights or remedies to a claim arising prior to the Petition Date are enjoined unless and until the Bankruptcy Court lifts the automatic stay. Vendors are being paid
for goods furnished and services provided after the Petition Date in the ordinary course of business. The deadline for filing of proofs of claims against the Company has not yet been established by the Bankruptcy Court.

In order to successfully emerge from bankruptcy, Ambac will need to propose and obtain confirmation by the Bankruptcy Court of a plan of
reorganization that satisfies the requirements of the Bankruptcy Code. A plan of reorganization would, among other things, resolve Ambacs obligations arising prior to the Petition Date, set forth the revised capital structure of a newly
reorganized Ambac and provide for corporate governance subsequent to emergence from bankruptcy.

Upon commencing the
Bankruptcy Filing, Ambac has the exclusive right for 120 days after the Petition Date (and subject to any Bankruptcy Court authorized extension thereof) to file a plan of reorganization and, if we do so, 60 additional days (and subject to any
Bankruptcy Court authorized extension thereof) to obtain necessary acceptances of the plan. If Ambacs exclusivity period lapses, any party in interest would be able to file a plan of reorganization for Ambac. In additional to being voted on by
holders of impaired claims and equity interests, a plan of reorganization must satisfy certain requirements of the Bankruptcy Code and must be approved, or confirmed by the Bankruptcy Court in order to become effective.

A plan of reorganization will be deemed accepted by holders of claims against and equity interests in Ambac if (1) at least one-half
in number and two-thirds in dollar amount of claims actually



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



voting in each impaired class of claims have voted to accept the plan, and (2) at least two-thirds in amount of equity interests actually voting in each impaired class of equity interests
has voted to accept the plan. Under certain circumstances set forth in Section 1129(b) of the Bankruptcy Code, however, the Bankruptcy Court may confirm a plan even if such plan has not been accepted by all impaired classes of claims and equity
interests. A class of claims or equity interests that does not receive or retain any property under the plan on account of such claims or interests is deemed to have voted to reject the plan. The precise requirements and evidentiary showing for
confirming a plan, notwithstanding its rejection by one or more impaired classes of claims or equity interests, depends upon a number of factors, including, without limitation, the status and seniority of the claims or equity interests in the
rejecting class (i.e. secured claims or unsecured claims, subordinate or senior claims, preferred or common stock). Generally, with respect to common stock interests, a plan may be crammed down even if the stockholders receive no
recovery if the proponent of the plan demonstrates that (1) no class junior to the common stock is receiving or retaining property under the plan and (2) no class of claims or interests senior to the common stock is being paid more than in
full.

A significant consideration for any restructuring or reorganization is the impact, if any, on the Companys
estimated $7,603,665 net operating loss (NOLs) tax carry forward. The Company considers the NOLs to be a valuable asset. However, the Companys ability to use the NOLs could be substantially limited if there were an ownership
change as defined under Section 382 of the Internal Revenue Code of 1986, as amended. In general, an ownership change would occur if shareholders owning 5% or more of the Companys stock increased their percentage ownership (by
value) in the Company to 50% or more, as measured over a rolling three year period beginning with the last ownership change. These provisions can be triggered by new issuances of stock, merger and acquisition activity or normal market trading. On
February 2, 2010, the Company entered into a Tax Benefit Preservation Plan to reduce the risk of an ownership change resulting from the trading of the Companys stock.

Stock issued to the Companys debt holders in connection with a reorganization could trigger an ownership change if a significant
portion of the debt being exchanged had been held by such debt holders for less than 18 months prior to the filing for bankruptcy and certain other factual or legal exceptions were not applicable. Accordingly, extensive buying of the Companys
debentures prior to a bankruptcy filing by persons who could hold 5% or more of the Companys stock following a bankruptcy reorganization could substantially limit the Companys ability to use its NOLs. See Part II, Item 1A.
Risk FactorsThe Ambac Assurance NOL (and certain other tax attributes or tax benefits of the Ambac Consolidated Tax Group) may be subject to limitation as a result of a bankruptcy reorganization.

In connection with the Bankruptcy Filing, the Bankruptcy Court issued an interim order (the Interim Order) restricting
certain transfers of equity interests in and claims against the Company. The purpose of the Interim Order is to preserve the Companys NOLs, which totaled approximately $7,603,665 as of September 30, 2010. Under section 382 of the Internal
Revenue Code of 1986, as amended (the Tax Code), transfers by persons or entities holding 5 percent or more of the Companys outstanding equity interests could impair or permanently eliminate the Companys NOLs. Moreover,
transfers of claims against the Company by persons or entities who may receive 5 percent or more of the reorganized Companys stock pursuant to a bankruptcy plan of reorganization may impair or permanently eliminate the Companys NOLs.
Accordingly, the Interim Order implements notice and hearing procedures for transfers by a person or entity that beneficially owns, or would beneficially own, more than 13,500,000 shares of the Companys stock. Transfers of stock in violation
of this Interim Order will be void ab initio. In addition, the Interim Order requires persons or entities that beneficially own claims against the Company totaling more than an amount which could permit such claimholder to acquire 4.5 percent or
more of the reorganized debtor agree to sell down a portion of its claims against the Company prior to a bankruptcy reorganization, such that the claimholder would receive less than 4.5



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



percent of the reorganized Companys stock in a bankruptcy plan of reorganization that may qualify for section 382(l)(5) of the Tax Code. Any claimholder who does not comply with the Interim
Order would only receive stock in the reorganized Company equal to less than 4.5 percent of the reorganized Companys outstanding stock.

Ambac Assurances CDS portfolio experienced significant losses. The majority of these CDS contracts are on a pay as you go basis, and we believe that they are properly characterized as
notional principal contracts for U.S. federal income tax purposes. Generally, losses on notional principal contracts are ordinary losses. However, the federal income tax treatment of credit default swaps is an unsettled area of the tax law. As such,
it is possible that the Internal Revenue Service may decide that the pay as you go CDS contracts should be characterized as capital assets or that certain payments made with respect to the CDS contracts should be characterized as capital
losses. Recently, the Internal Revenue Service opened an examination into certain issues related to Ambac Assurances tax accounting methods with respect to such CDS contracts and Ambac Assurances related characterization of such losses
as ordinary losses. Although, as discussed above, Ambac Assurance believes these contracts are properly characterized as notional principal contracts, if the Internal Revenue Service today were to successfully assert, as a result of its examination,
that these contracts should be characterized as capital assets or as generating capital losses, Ambac Assurance would be subject to both a substantial reduction in its net operating loss carryforwards and would suffer a material assessment for
federal income taxes.

On November 9, 2010, the Company and the Internal Revenue Service (the IRS) agreed to
a stipulation on the record that provides that the IRS would give notice at least 5 business days prior to taking any action against the Companys nondebtor subsidiaries in the consolidated tax group that would violate the State Court
Injunction, whether or not in effect. The stipulation permits the status quo to be maintained from November 9, 2010 until a hearing on the preliminary injunction that the Company plans to seek under Bankruptcy Code section 105(a) barring
assessment and collection of the 2003 through 2008 tax refunds by the IRS against the Companys nondebtor subsidiaries in the consolidated tax group. On the same date, Ambac filed and served a complaint against the IRS for a declaratory
judgment relating to the tax refunds.

Ambacs liquidity and solvency, both on a near-term basis and a long-term basis,
are largely dependent on its current cash and investments of $63,179, dividends from Ambac Assurance, and on the residual value of Ambac Assurance. It is highly unlikely that Ambac Assurance will be able to make dividend payments to Ambac for the
foreseeable future. The principal uses of liquidity will be the payment of operating expenses, expenses incurred in connection with the Bankruptcy Filing and expenses related to pending litigation. The likelihood of dividend payments to Ambac from
Ambac Assurance could be further reduced, see Part II, Item 1A. Risk Factors  The occurrence of certain events could result in the initiation of delinquency proceedings against Ambac Assurance.

While management believes that Ambac will have sufficient liquidity to satisfy its needs until it emerges from the bankruptcy proceeding,
no guarantee can be given that it will be able to pay all such expenses. If its liquidity runs out prior to emergence from bankruptcy, a liquidation of the Company pursuant to Chapter 7 of the Bankruptcy Code will occur. While Ambacs NOLs
could be used to offset income or gain realized prior to a completion of a liquidation, the NOLs would not be available following the liquidation or sale of Ambacs assets. As a result, in the event of a Chapter 7
liquidation, Ambac is likely to be unable to utilize a substantial portion of its NOLs.

NYSE Delisting

On November 9, 2010, NYSE Regulation, Inc. (NYSE Regulation) announced immediate suspension of trading on the
New York Stock Exchange (the NYSE) of the common stock of the Company and the suspension of trading on the NYSE of certain other securities of the Company (collectively, the Suspended NYSE Securities). NYSE Regulation
determined that the Company is no longer suitable for listing in light of the Bankruptcy Filing, which is sufficient grounds for the commencement of delisting procedures according to Section 802.01D of the NYSEs Listed Company Manual. In its
announcement regarding the suspension, NYSE Regulation noted the uncertainty as to the timing and outcome of the bankruptcy process as well as the ultimate effect of this process on the Companys equity holders. Additionally, NYSE Regulation
noted that the Company had previously been notified that it had fallen below the NYSEs continued listing standard for average closing price of less than $1.00 over a consecutive 30 trading day period.

At this time the Company does not intend to take any action to appeal the NYSEs decision and, therefore, it is expected that the
Suspended NYSE Securities will be delisted after completion by the NYSE of application to the Securities and Exchange Commission (the SEC).

The Suspended NYSE Securities include:



| |  |  | Common Stock, $0.01 per share (NYSE ticker symbol: ABK);
| | - |  | --------------------------------------------------------



| |  |  | 5.875% Debentures, Due March 24, 2103 (NYSE ticker symbol: AKT);
| | - |  | ----------------------------------------------------------------



| |  |  | 5.95% Debentures, Due February 28, 2103 (NYSE ticker symbol: AKF); and
| | - |  | ----------------------------------------------------------------------



| |  |  | 9.50% Equity Units, Due February 15, 2021 (NYSE ticker symbol: ABK PRZ).
| | - |  | ------------------------------------------------------------------------

As a result of the delisting, the Companys common stock and the shares of its equity units began trading exclusively on the
over-the-counter (OTC) market on November 9, 2010. On the OTC market, shares of the Companys common stock, which previously traded on the NYSE under the symbol ABK, trade under the symbol ABKFQ. Shares of the Companys equity
units, which previously traded on the NYSE under the symbol ABK-PRZ, trade under the symbol ABKOQ.

Segregated Account

On March 24, 2010, Ambac Assurance acquiesced to the request of the Office of the Commissioner of Insurance of the
State of Wisconsin (OCI) to establish a segregated account pursuant to Wisc. Stat. §611.24(2) (the Segregated Account). Under Wisconsin insurance law, the Segregated Account is a separate insurer from Ambac Assurance for
purposes of the Segregated Account Rehabilitation Proceedings (as defined and described below). The purpose of the Segregated Account is to segregate certain segments of Ambac Assurances liabilities. The Segregated Account will be operated in
accordance with a Plan of Operation (the Plan of Operation) and certain operative documents relating thereto (which include the Secured Note, the Reinsurance Agreement, the Management Services Agreement and the Cooperation Agreement).
These operative documents provide that the Segregated Account will act exclusively through the rehabilitator. Pursuant to the Plan of Operation, Ambac Assurance has allocated to the Segregated Account (1) certain policies insuring or relating
to credit default swaps; (2) residential mortgage-backed securities (RMBS) policies; (3) certain Student Loan Policies, some of which were allocated to the Segregated Account on March 24, 2010 (or shortly thereafter), and
some of which were allocated on October 8, 2010, after undergoing an assessment process contemplated by the Plan of Operations; and (4) other policies insuring obligations with substantial projected impairments or relating to transactions
which have contractual triggers based upon Ambac Assurances financial condition or the commencement of rehabilitation, which triggers are potentially damaging (collectively, the Segregated Account Policies). The policies
described in (4) above include (a) certain types of securitizations, including commercial asset-backed transactions, consumer asset-backed transactions and other types of structured transactions; (b) the policies relating to Las Vegas
Monorail Company; (c) policies relating to debt securities purchased by, and the debt securities issued by,



11



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



Juneau Investments, LLC and Aleutian Investments, LLC, which are both finance companies owned by Ambac Assurance; (d) policies relating to leveraged lease transactions; and (e) policies
relating to interest rate, basis, and/or currency swap or other swap transactions. Ambac Assurance also allocated the following to the Segregated Account: (i) all remediation claims, defenses, offsets, and/or credits (except with respect to
recoveries arising from remediation efforts or reimbursement or collection rights), if any, in respect of the Segregated Account Policies, (ii) Ambac Assurances disputed contingent liability, if any, under the long-term lease with One
State Street, LLC, and its contingent liability (as guarantor), if any, under the Ambac Assurance UK Limited (Ambac UK) lease with British Land, (iii) Ambac Assurances limited liability interests in Ambac Credit Products, LLC
(ACP), Ambac Conduit Funding LLC, Aleutian Investments, LLC (Aleutian) and Juneau Investments, LLC (Juneau) and (iv) all of Ambac Assurances liabilities as reinsurer under reinsurance agreements (except
for reinsurance assumed from Everspan). Net par exposure as of September 30, 2010 for policies allocated to the Segregated Account, including student loan policies allocated on October 8, 2010, is $45,949,138. Net par exposure
allocated to the Segregated Account no longer includes exposure previously assumed from Ambac UK. See below for further discussion on the Commutation of the AUK Reinsurance Agreement on September 28, 2010.

On March 24, 2010, the OCI commenced rehabilitation proceedings with respect to the Segregated Account (the Segregated Account
Rehabilitation Proceedings) in order to permit the OCI to facilitate an orderly run-off and/or settlement of the liabilities allocated to the Segregated Account pursuant to the provisions of the Wisconsin Insurers Rehabilitation and
Liquidation Act. The rehabilitator of the Segregated Account is Sean Dilweg, the Commissioner of Insurance of the State of Wisconsin. On March 24, 2010, the rehabilitation court also issued an injunction effective until further order of
the court enjoining certain actions by Segregated Account policyholders and other counterparties, including the assertion of damages or acceleration of losses based on early termination and the loss of control rights in insured transactions. Certain
Segregated Account policyholders have filed lawsuits challenging the Segregated Account Rehabilitation Proceedings (see Legal Proceedings).

In July 2010, the Segregated Account issued $50,000 of Segregated Account Surplus Notes in connection with the commutation of an insurance policy allocated to the Segregated Account. At September 30,
2010, the Segregated Account Surplus Notes are reported in long-term debt on the consolidated balance sheet with a carrying value of $5,012 based on an imputed interest rate of 53.9% at the date of issuance and have a scheduled maturity of
June 7, 2020. Interest on the Segregated Account Surplus Notes is payable annually at the rate of 5.1% on the unpaid principal balance outstanding. All payments of principal and interest on the Segregated Account Surplus Notes are subject to
the prior approval of the OCI. If the OCI does not approve the payment of interest on the Segregated Account Surplus Notes, such interest will accrue and compound annually until paid. The Segregated Account Surplus Notes were issued pursuant to a
fiscal agency agreement entered into with The Bank of New York Mellon, as fiscal agent.

On October 8, 2010, the
Rehabilitator filed a plan of rehabilitation for the Segregated Account (the Segregated Account Rehabilitation Plan) in the Dane County Circuit Court in Wisconsin (the Rehabilitation Court). Before the Segregated Account
Rehabilitation Plan can become effective it must be confirmed by the Rehabilitation Court. The hearing on the Rehabilitators motion for confirmation of the Segregated Account Rehabilitation Plan has been scheduled to begin on November 15,
2010. Claims on Segregated Account Policies remain subject to a payment moratorium until the Segregated Account Rehabilitation Plan becomes effective. Insurance claims presented during the moratorium of $1,083,796 for policies allocated to the
Segregated Account have not yet been paid. If the Segregated Account Rehabilitation Plan is confirmed by the Rehabilitation Court, holders of permitted policy claims will receive 25% of their permitted claims in cash and 75% in surplus notes (the
Segregated Account Surplus Notes) with the same terms as the Ambac Assurance Surplus Notes (as defined below), and delivery of



12



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



such cash and Segregated Account Surplus Notes will constitute satisfaction in full of the Segregated Accounts obligations in respect of each claim. The policyholders will not have the
option to reject the surplus notes as consideration for settling claim liabilities. The Segregated Account Rehabilitation Plan also makes permanent the injunctions issued by the Rehabilitation Court on March 24, 2010.

Effective November 7, 2010, the Plan of Operation for the Segregated Account was amended for the purpose of allocating to the
Segregated Account (i) any and all liabilities (including contingent liabilities) it has or may have, now or in the future, to the Company, or any successor to the Company, in regard to, or respecting, tax refunds and/or the July 18, 1991
Tax Sharing Agreement, as amended (other than any liability to the Company pertaining to any possible misallocation of up to $38,486 of tax refunds received by Ambac Assurance in September 2009 and February 2010), (ii) any and all liabilities
(including contingent liabilities) it has or may have, now or in the future, to the IRS and/or the United States Department of the Treasury (the U.S. Treasury) in regard to, or in respect of, taxes imposed under the Internal Revenue Code
of 1986, as amended (the Federal Taxes), for taxable periods ending on or prior to December 31, 2009 and, (iii) to the extent not described in clause (ii), any and all liabilities (including contingent liabilities) Ambac
Assurance has or may have, now or in the future, to the IRS and/or the U.S. Treasury in regard to, or respect of, any Federal Tax refunds that were received prior to November 7, 2010 by Ambac Assurance, the Company or their affiliates (each of
clauses(i), (ii) and (iii), the Allocated Disputed Contingent Liabilities). In addition, on November 8, 2010, the rehabilitation court issued an order for temporary supplemental injunctive relief (the State Court
Injunction) enjoining the Company, any successor-in-interest, any state court receiver of the Company, all persons purporting to be creditors of the Company, the IRS and all other federal and state governmental entities from commencing or
prosecuting any actions, claims, lawsuits or other formal legal proceedings relating to the Allocated Disputed Contingent Liabilities.

Ambac Assurance has issued a $2,000,000 secured note due in 2050 (the Secured Note) to the Segregated Account. The Segregated Account has the ability to demand payment from time to time to pay
claims and other liabilities. The balance of the Secured Note is $1,918,176 at September 30, 2010, inclusive of capitalized interest since the date of issuance. In addition, once the Secured Note has been exhausted, the Segregated Account has
the ability to demand payment from time to time under an aggregate excess of loss reinsurance agreement provided by Ambac Assurance (the Reinsurance Agreement) to pay claims and other liabilities. Ambac Assurance is not obligated to make
payments on the Secured Note or under the Reinsurance Agreement if its surplus as regards to policyholders is (or would be) less than $100,000, or such higher amount as the OCI permits pursuant to a prescribed accounting practice (the Minimum
Surplus Amount). As long as the surplus as regards to policyholders is not less than the Minimum Surplus Amount, payments by the general account of Ambac Assurance (the General Account) to the Segregated Account under the
Reinsurance Agreement are not capped. There is no Wisconsin insurance fund available to pay claims.

Pursuant to the terms of
the Plan of Operation (defined below), assets and investments, if any, allocated to the Segregated Account will be available and used solely to satisfy costs, expenses, charges, and liabilities attributable to the items allocated to the Segregated
Account. Such assets and investments, if any, will not be charged with any costs, expenses, charges, or liabilities arising out of any other business of Ambac Assurance, except as otherwise provided in the Secured Note or the Reinsurance Agreement.
Likewise, assets and investments in the General Account will not be charged with any costs, expenses, charges, or liabilities arising out of the direct business allocated to the Segregated Account, except as otherwise provided in the Secured Note or
the Cooperation Agreement (as defined and described below).

The Secured Note will be subject to mandatory prepayment on
demand in an amount equal to (i) the cash portion of claim liabilities, loss settlements, commutations and purchases of Segregated



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



Account Policies (or related insured obligations) due and payable by the Segregated Account (Segregated Account Policy Cash Payments), amounts due and payable by the Segregated
Account arising out of the non-policy obligations allocated thereto, and any cash interest payment and cash principal repayment under any Segregated Account Surplus Notes in connection with any of the foregoing, provided in each case such amounts
due and payable are in accordance with the Segregated Account Rehabilitation Plan and not otherwise disapproved by the rehabilitator of the Segregated Account plus (ii) amounts due and payable by the Segregated Account in respect of specified
administrative expenses of the Segregated Account plus (iii) other amounts directed to be paid by the rehabilitator of the Segregated Account in conjunction with the rehabilitation proceeding, minus (iv) the amount of the Segregated
Accounts liquid assets as determined by the Segregated Account. In addition, if an event of default occurs under the Secured Note, the Segregated Account is entitled to accelerate the outstanding principal amount due under the Secured Note.

Interest on the Secured Note accrues at the rate of 4.5% per annum, and accrued interest will be added to principal
quarterly. Ambac Assurance has secured its obligations under the Secured Note and the Reinsurance Agreement by granting to the Segregated Account a security interest in all of Ambac Assurances right, title and interest in installment premiums
received in respect of the Segregated Account Policies; reinsurance premiums received in respect of assumed reinsurance agreements with respect to which the liabilities of Ambac Assurance have been allocated to the Segregated Account; recoveries
under third party reinsurance agreements in respect of the Segregated Account Policies; and any recoveries arising from remediation efforts or reimbursement or collection rights with respect to policies allocated to the Segregated Account. Pursuant
to the Secured Note, Ambac Assurance has made certain covenants to the Segregated Account, including covenants that Ambac Assurance will not, (i) without the Segregated Accounts consent (not to be unreasonably withheld), amend its
investment policies if doing so would have a material adverse effect on Ambac Assurances ability to perform its obligations under the Secured Note, the Reinsurance Agreement and the documents relating thereto or under any other material
agreement to which it is a party, (ii) without the prior approval of the OCI and the rehabilitator of the Segregated Account, directly or indirectly make any distribution to its shareholder or redeem any of its securities and,
(iii) without the Segregated Accounts consent (not to be unreasonably withheld), enter into any transaction other than pursuant to the reasonable requirements of Ambac Assurances business and which Ambac Assurance reasonably
believes are fair and reasonable terms and provisions.

Pursuant to the Reinsurance Agreement, Ambac Assurance has agreed to
pay Segregated Account Policy Cash Payments, any cash interest payment and cash principal repayment under any Segregated Account Surplus Notes in connection with any of the foregoing and other amounts directed to be paid by the rehabilitator of the
Segregated Account in conjunction with the rehabilitation proceeding, minus the amount of the Segregated Accounts liquid assets as determined by the Segregated Account. Ambac Assurances liability under the Reinsurance Agreement will
attach only after all principal under the Secured Note has been paid. The Reinsurance Agreement contains the same covenants for the benefit of the Segregated Account as those that appear in the Secured Note, as described in the preceding paragraph.

Policy obligations not transferred to the Segregated Account remain in the General Account, and such policies in the General
Account are not subject to and, therefore, will not be directly impacted by, the Segregated Account Rehabilitation Plan. Ambac Assurance is not, itself, in rehabilitation proceedings.

During the Segregated Account Rehabilitation Proceedings, the Rehabilitator controls the management of the Segregated Account. Ambac
Assurance will provide certain management and administrative services to the Segregated Account and the Rehabilitator pursuant to a Management Services Agreement (the Management Services Agreement), including information technology



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



services, credit exposure management, treasury, accounting, tax, management information, risk management, loss management, internal audit services and business continuity services. Services will
be provided at cost, subject to mutual agreement of the Segregated Account and Ambac Assurance. Either party may terminate the Management Services Agreement for cause upon 120 days written notice (or such shorter period as the rehabilitator may
determine) and the Segregated Account may terminate without cause at any time upon at least 30 days prior notice. If the Segregated Account elects to terminate the Management Services Agreement, Ambac Assurance will not have the right to consent to
the replacement services provider.

Ambac Assurance and the Segregated Account have also entered into a Cooperation Agreement
(the Cooperation Agreement), pursuant to which the parties have agreed to certain matters related to decision-making, information sharing, tax compliance and allocation of expenses (including an agreement by Ambac Assurance to reimburse
the Segregated Account for specified expenses to the extent not reimbursed under the Secured Note, subject to the Minimum Surplus Amount). Ambac Assurance has made certain covenants to the Segregated Account, including an agreement to not enter into
any transaction involving more than $5,000 (or such higher amount as is agreed with the rehabilitator) without the Segregated Accounts prior consent (other than policy claim payments made in the ordinary course of business and investments in
accordance with Ambac Assurances investment policy), and providing the Segregated Account with an annual budget and projection for Ambac Assurance and its subsidiaries for the forthcoming fiscal year, as well as quarterly updates thereto. The
Cooperation Agreement also addresses Ambac Assurances rights in the event Ambac Assurance is no longer the management and administrative services provider to the Segregated Account as described above.

Settlement Agreement

On June 7, 2010, Ambac Assurance Corporation entered into a Settlement Agreement (the Settlement Agreement) with the counterparties (the Counterparties) to outstanding credit
default swaps with Ambac Credit Products, LLC (ACP) that were guaranteed by Ambac Assurance. Pursuant to the terms of the Settlement Agreement, in exchange for the termination of the Commuted CDO of ABS Obligations (as defined below),
Ambac Assurance paid to the Counterparties in the aggregate (i) $2,600,000 in cash and (ii) $2,000,000 in principal amount of newly issued surplus notes of Ambac Assurance (the Ambac Assurance Surplus Notes). In addition,
effective June 7, 2010, the outstanding credit default swaps with the Counterparties remaining in the General Account of Ambac Assurance have been amended to remove certain events of default and termination events, as set forth in the
Settlement Agreement.

Pursuant to the Settlement Agreement, Ambac Assurance has filed an amendment to its articles of
incorporation. Under such amendment, at all times after September 30, 2010, at least two members of the board of directors of Ambac Assurance must be Unaffiliated Qualified Directors (as defined in the Settlement Agreement) and, at all times
after November 29, 2010, at least one-third (and, in any event, not less than three members) of the board of directors of Ambac Assurance must be Unaffiliated Qualified Directors. If at any time Ambac Assurance does not have the requisite
number of Unaffiliated Qualified Directors, Ambac Assurance has agreed to use its commercially reasonable efforts to find additional Unaffiliated Qualified Directors. Effective October 25, 2010, one-third of Ambac Assurances Board of
Directors are Unaffiliated Qualified Directors.

The Settlement Agreement includes covenants that remain in force until the
Ambac Assurance Surplus Notes have been redeemed, repurchased or repaid in full. These covenants generally restrict the operations of Ambac Assurance and its subsidiaries to runoff activities. Certain of these restrictions may be waived with the
approval of a majority of the Unaffiliated Qualified Directors and/or the OCI. However, other restrictions may only be waived with the approval of the holders of a majority of the outstanding Ambac Assurance Surplus Notes (excluding any notes held
by Ambac Assurance or its affiliates) that cast a ballot and, in certain cases, with the approval of all of the Counterparties.



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Pursuant to a
commutation agreement entered into with each of the Counterparties that is a party to credit default swaps written by ACP with respect to certain CDO of ABS obligations and related financial guaranty insurance policies written by Ambac Assurance
with respect to ACPs obligations thereunder, Ambac Assurance and ACP have commuted all of such obligations (the Commuted CDO of ABS Obligations), totaling $16,542,575 of par. In addition to the commutation of the Commuted CDO of
ABS Obligations, Ambac Assurance has also commuted for $96,518 of cash certain additional obligations, including certain non-CDO of ABS obligations, to the Counterparties with par or notional amounting to $1,406,544. Ambac Assurance commuted another
CDO of ABS transaction in an amount equal to its remaining par value of $90,016. It is expected that, subject to certain conditions, certain other non-CDO of ABS obligations with par amounting to a maximum of approximately $1,494,125 will be
commuted within the next twelve months for a maximum amount of approximately $115,000 of cash plus surplus notes of Ambac Assurance with a par value of $60,000. Each of the Counterparties, in the aggregate and Ambac Assurance, ACP and Ambac, in the
aggregate, have released the other party from any claims relating to any credit default swaps or financial guaranty insurance policies commuted pursuant to the Commutation Agreements. In addition, Ambac Assurance, ACP and Ambac, in the aggregate,
and a Counterparty have generally released the other parties from any claims relating to actions taken or omitted to be taken prior to June 7, 2010, subject to certain exceptions.

At September 30, 2010, the Ambac Assurance Surplus Notes issued in connection with the Settlement Agreement are reported in
long-term debt on the consolidated balance sheet with a carrying value of $201,542 based on an imputed interest rate of 53.9% at the date of issuance and have a scheduled maturity of June 7, 2020. Interest on the Ambac Assurance Surplus Notes
is payable annually at the rate of 5.1% on the unpaid principal balance outstanding. All payments of principal and interest on the Ambac Assurance Surplus Notes are subject to the prior approval of the OCI. If the OCI does not approve the payment of
interest on the Ambac Assurance Surplus Notes, such interest will accrue and compound annually until paid. The Ambac Assurance Surplus Notes were issued pursuant to a Fiscal Agency Agreement entered into on June 7, 2010 with The Bank of New
York Mellon, as fiscal agent (the Fiscal Agency Agreement).

Ambac Assurance has entered into call options with
certain of the Counterparties pursuant to which, with the prior consent of OCI, Ambac Assurance may repurchase Ambac Assurance Surplus Notes from such Counterparties. As of the date hereof, Ambac Assurance has options to call an aggregate of
$940,000 in principal amount of Ambac Assurance Surplus Notes at a weighted average call price of $0.22 per $1.00 face amount. At September 30, 2010, these options have a weighted average maturity of approximately 23 months.

Pursuant to the terms of the Settlement Agreement, on June 7, 2010, Ambac entered into an amendment to the Tax Sharing
Agreement (the Tax Sharing Agreement) with its affiliates. Under the Tax Sharing Agreement, the consolidated net operating losses (NOL) of the group are treated as an asset of Ambac Assurance and its subsidiaries. Ambac is
required to compensate Ambac Assurance on a current basis for use of any portion of that asset, except that Ambac is not required to compensate Ambac Assurance for Ambacs use of NOL in connection with cancellation of debt income associated
with restructurings of its debt outstanding as of March 15, 2010. The Tax Sharing Agreement can be amended with the consent of OCI and majority of the Unaffiliated Qualified Directors.

Ambac UK

Pursuant to the Amended and Restated 1997 Reinsurance Agreement between Ambac UK and Ambac Assurance (the AUK Reinsurance
Agreement), Ambac Assurance reinsured on a quota share basis 90% of the liabilities under policies issued by Ambac UK, and reinsured on an excess of loss basis Ambac UK policy liabilities in excess of £500,000 per anum. Ambac UK
purported to terminate the



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



AUK Reinsurance Agreement on March 22, 2010, and then again on March 24, 2010, after commencement of the Proceeding. On March 24, 2010, Ambac Assurances liabilities under the
AUK Reinsurance Agreement were allocated to the Segregated Account.

On September 28, 2010, Ambac Assurance entered into
a Commutation and Release Agreement (the AUK Commutation Agreement) with Ambac UK and the Special Deputy Commissioner of OCI, pursuant to which (i) the AUK Reinsurance Agreement was commuted and (ii) the Net Worth
Maintenance Agreement, dated as of January 1, 1997, by and between Ambac UK and Ambac Assurance (the NWMA) was terminated in exchange for, among other things, certain mutual releases, including, without limitation, any right of
Ambac Assurance or the Segregated Account to reinsurance premiums from Ambac UK. Ambac Assurance paid a nominal termination amount of one U.S. dollar to Ambac UK in connection with the commutation. The overall consolidated effect of terminating this
reinsurance agreement was a net gain of $157,792, which is reported in Financial Guarantee Other Income. This gain resulted primarily from the recognition of foreign currency gains that, prior to the termination, were not reflected in certain of
Ambac Assurances non-monetary assets or liabilities, such as unearned premium reserves or deferred acquisition costs, since these non-monetary assets and liabilities were required to be recorded based on their historical foreign exchange
rates.

Impact of Settlement Agreement and Segregated Account Rehabilitation Proceeding on Ambac

Under the terms of the Settlement Agreement, Ambac Assurance has issued Ambac Assurance Surplus Notes to the Counterparties. In addition,
pursuant to the terms of the Segregated Account Rehabilitation Plan, the Segregated Account will issue Segregated Account Surplus Notes (together with the Ambac Assurance Surplus Notes, the Surplus Notes) to pay a portion of the claims
of the Segregated Account. The aggregate par value of the Surplus Notes issued by Ambac Assurance will be substantial. The Surplus Notes rank senior to Ambacs equity investment in Ambac Assurance. There is residual value to Ambac in Ambac
Assurance only to the extent that funds remain at Ambac Assurance after the payment of claims under outstanding financial guaranty policies and the redemption, repurchase or repayment in full of the Surplus Notes and Ambac Assurances auction
market preferred shares. The value of Ambacs equity investment in Ambac Assurance is difficult to estimate, and will primarily depend on the performance of Ambac Assurances insured portfolio (i.e., the ultimate losses therein relative to
its claims paying resources), ongoing remediation efforts of Ambac Assurance with respect to policies allocated to the Segregated Account, including those relating to residential mortgage-backed securities, and on other factors, including Ambac
Assurances ability to repurchase Surplus Notes and its auction market preferred shares at less than their face value.

In addition, the rehabilitator of the Segregated Account retains significant decision-making authority with respect to the Segregated
Account and has the discretion to oversee and approve certain actions taken by Ambac Assurance in respect of assets and liabilities which remain in Ambac Assurance, and such decisions will be made by the rehabilitator for the benefit of
policyholders and the rehabilitator will not take into account the interests of securityholders of Ambac. Actions taken by the rehabilitator could further reduce the equity value of Ambac Assurance.

Tax Treatment of Surplus Notes

It is possible that the Surplus Notes may be characterized as equity of Ambac Assurance for U.S. federal income tax purposes. If the Surplus Notes are characterized as equity of Ambac Assurance and it is
determined the Surplus Notes represent more than 20% of the total value of the stock of Ambac Assurance, Ambac Assurance may no longer be characterized as an includable corporation that is affiliated with Ambac. As a result, Ambac Assurance may no
longer be characterized as a member of the U.S. federal income tax consolidated group of which Ambac is the common parent (the Company Consolidated Tax Group) and Ambac Assurance would be required to file a separate consolidated tax
return as the common parent of a new U.S. federal income tax consolidated group including Ambac Assurance, as the new common parent, and Ambac Assurances subsidiaries (the Ambac Assurance Consolidated Tax Group).



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





To the extent
Ambac Assurance is no longer a member of the Company Consolidated Tax Group, the Ambac Assurance NOL (and certain other available tax attributes of Ambac Assurance and the other members of the Ambac Assurance Consolidated Tax Group) may no longer be
available for use by Ambac or any of the remaining members of the Company Consolidated Tax Group to reduce the U.S. federal income tax liabilities of the Company Consolidated Tax Group. This could result in a material increase in future tax
liabilities of Ambac Consolidated Tax Group. In addition, certain other benefits resulting from U.S. federal income tax consolidation may no longer be available to the Company Consolidated Tax Group, including certain favorable rules relating to
transactions occurring between members of the Company Consolidated Tax Group and members of the Ambac Assurance Consolidated Tax Group.

If the Surplus Notes are characterized as equity of Ambac Assurance and it is determined the Surplus Notes represent more than 50% of the total value of the stock of Ambac Assurance, the Ambac Assurance
NOL (and certain other tax attributes or tax benefits of the Ambac Assurance Consolidated Tax Group) may be subject to limitation, including the limitation provided by Section 382 of the Internal Revenue Code of 1986, as amended (the
Code). If Section 382 were applicable with respect to the Ambac Assurance Consolidated Tax Group, in general, the Ambac Assurance Consolidated Tax Group annual use of the groups NOL may be limited to an amount equal to the
product of (i) the value of the Ambac Assurance Consolidated Tax Groups stock and (ii) the applicable federal long-term tax exempt interest rate. However, certain exemptions to the Code Section 382 limitation may be applicable.

Furthermore, to the extent Ambac Assurance is no longer characterized as a member of the Company Consolidated Tax Group, the
Ambac Assurance Consolidated Tax Group may not reconsolidate with Ambac Consolidated Tax Group for a period of five years following such event, even if Ambac were to be characterized as reacquiring or owning 80% or more of the stock of the Ambac
Assurance Consolidated Tax Group following any deconsolidation. In addition, depending upon certain facts related to the potential deconsolidation of the Ambac Assurance Consolidated Tax Group and any reconsolidation with the Company Consolidated
Tax Group, the acquisition by the Company Consolidated Tax Group of additional value with respect to the stock of the Ambac Assurance Consolidated Tax Group may also result in the imposition of a Code Section 382 limitation with respect to the
Ambac Assurance Consolidated Tax Groups NOL, reducing or eliminating the potential tax benefit of the NOL to the Ambac Assurance Consolidated Tax Group.

Reclassifications:

Certain reclassifications have been made to
prior periods amounts to conform to the current periods presentation, including those related to the adoption of ASU 2009-17, Consolidations (Topic 810): Improvements to Financial Reporting by Enterprise Involved with Variable
Interest Entities.

(2) Net income per Share

ASC Paragraph 260-10-65-2 of ASC Topic 260, Earnings Per Share, effective for fiscal years beginning after December 15, 2008, clarified that unvested share-based payment awards that
contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and shall be included in the computation of EPS pursuant to the two-class method, which Ambac adopted in 2009. Retrospective
application is required. Ambac had participating securities consisting of nonvested common stock with the same voting and dividend rights as our common stock. These shares of common stock vested in January 2010. Accordingly, Ambac applied the
two-class



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



method in 2009 and is no longer required to apply the two-class method in 2010. Basic net income per share is computed by dividing net income available to common stockholders by the
weighted-average number of common shares outstanding during 2010. Basic net income per share is computed by dividing net income available to common stockholders less income allocated to participating securities, by the weighted-average number of
common shares outstanding during 2009. The amount of income allocated to participating securities amounted to a $0.03 and $0.00 reduction to basic net income per common share outstanding during the three and nine months ended September 30,
2009, respectively.

Common shares outstanding includes common stock issued less treasury shares plus restricted stock units
for which no future service is required as a condition to the delivery of the underlying common stock. Diluted net income per share is computed by dividing net income attributable to common stockholders plus effects of assumed debt retirement by the
weighted-average number of common shares outstanding during the period, plus all dilutive potential common shares outstanding during the period. All dilutive potential common shares outstanding consider common stock deliverable pursuant to stock
options, nonvested restricted stock units, nonvested common shares, and stock purchase contracts. There were no dilutive effects for the three and nine months ended September 30, 2010 and 2009. The following table presents securities
outstanding that could potentially dilute basic EPS in the future that were not included in the computation of diluted EPS because they were antidilutive for the three and nine months ended September 30, 2010 and 2009:



|                           |  |                             |            |  |                            |  |            |  |  |  |            |  |  |  |            | 
|-------------------------- |  | --------------------------- | ---------- |  | -------------------------- |  | ---------- |  |  |  | ---------- |  |  |  | ---------- | 
|                           |  | Three Months EndedSept.
30, |            |  | Nine Months EndedSept.
30, | 
|                           |  |                             | 2010       |  |                            |  | 2009       |  |  |  | 2010       |  |  |  | 2009       | 
|Stock options              |  |                             | 2,704,875  |  |                            |  | 3,832,109  |  |  |  | 2,840,390  |  |  |  | 3,961,631  | 
|Restricted stock and units |  |                             | 994,065    |  |                            |  | 2,655,417  |  |  |  | 1,120,815  |  |  |  | 2,814,636  | 
|Stock purchase contracts   |  |                             | 37,037,000 |  |                            |  | 37,037,000 |  |  |  | 37,037,000 |  |  |  | 37,037,000 | 

(3) Application of the New
Consolidation Accounting Standard on Special Purposes Entities, Including Variable Interest Entities

In December 2009,
the FASB issued ASU 2009-16, Transfers and Servicing (Topic 860): Accounting for Transfers of Financial Assetsand ASU 2009-17, Consolidations (Topic 810): Improvements to Financial Reporting by Enterprise Involved with Variable Interest
Entities.Ambac adopted ASU 2009-16 and ASU 2009-17 effective January 1, 2010. Among other changes, ASU 2009-16 eliminated the concept of a qualifying special-purpose entity (QSPE) and all QSPEs need to be considered for consolidation under
ASU 2009-17. Among other things, ASU 2009-17 requires an enterprise to perform an analysis to determine whether the enterprises variable interests give it a controlling financial interest in a variable interest entity (VIE). ASU 2009-17
identifies the primary beneficiary of a VIE as the enterprise that has both the following characteristics: a) the power to direct the activities of the VIE that most significantly impact the VIEs economic performance and b) the obligation to
absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE.

ASU 2009-17 eliminated the quantitative approach previously required to determine the primary beneficiary of a VIE, which was based on determining which enterprise absorbs the majority of the VIEs
expected losses, receives a majority of the VIEs expected residual returns, or both upon the inception of that holders involvement in the VIE. ASU 2009-17 requires ongoing reassessments of whether an enterprise is the primary beneficiary
of a VIE. The previous guidance required reconsideration of whether an enterprise is the primary beneficiary only when specific events occur.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





A VIE is an
entity: a) that lacks enough equity investment at risk to permit the entity to finance its activities without additional subordinated financial support from other parties; or b) where the group of equity holders does not have: (1) the
power, through voting rights or similar rights, to direct the activities of an entity that most significantly impact the entitys economic performance; (2) the obligation to absorb the entitys expected losses; or (3) the right
to receive the entitys expected residual returns. Ambac performs ongoing assessments to determine if we are the primary beneficiary of the VIE and, as such, conclusions may change over time. The determination of whether Ambac is the primary
beneficiary involves performing a qualitative analysis of the VIE that includes, among other factors, its capital structure, contractual terms including the rights of each variable interest holder, the activities of the VIE, whether Ambac has the
power to direct the activities of a VIE that most significantly impact the VIEs economic performance, whether Ambac has the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive
benefits from the VIE that could potentially be significant to the VIE, related party relationships and the design of the VIE.

Ambac has engaged in transactions with special purpose entities, including VIEs, in various capacities. Ambac has provided financial
guarantees, including credit derivative contracts for various debt obligations issued by various entities, including VIEs. Ambac has also sponsored two special purpose entities that issue medium-term notes to fund the purchase of certain financial
assets. Finally, Ambac is an investor in collateralized debt obligations, mortgage-backed and other asset-backed securities issued by VIEs and its ownership interest is generally insignificant to the VIE and/or Ambac does not have rights that direct
the activities that are most significant to such VIE. Refer to Note 8 for our exposure in such securities issued by VIEs. Our maximum exposure to loss is limited to the cost of our investments.

Financial Guarantees:

Ambac has provided financial guarantees in respect of assets held or debt obligations of special purpose entities, including VIEs. Ambacs primary variable interest exists through this financial
guarantee insurance or credit derivative contract. The transaction structure provides certain financial protection to Ambac. This financial protection can take several forms; however, the most common are over-collateralization, first loss and excess
spread. In the case of over-collateralization (i.e., the principal amount of the securitized assets exceeds the principal amount of the debt obligations guaranteed by Ambac Assurance), the structure allows the transaction to experience defaults
among the securitized assets before a default is experienced on the debt obligations that have been guaranteed by Ambac Assurance. In the case of first loss, the financial guarantee insurance policy only covers a senior layer of losses on assets
held or debt issued by special purpose entities, including VIEs. The first loss with respect to the assets is either retained by the seller or sold off in the form of equity or mezzanine debt to other investors. In the case of excess spread, the
securitized assets contributed to special purpose entities, including VIEs, generate interest cash flows that are in excess of the interest payments on the related debt; such excess cash flow is applied to redeem debt, thus creating
over-collateralization. Generally, upon deterioration in the performance of a transaction or upon an event of default as specified in the transaction legal documents, Ambac will obtain certain loss remediation rights. These rights enable Ambac to
direct the activities of the entity that most significantly impact the entitys economic performance.

We determined that
Ambac generally has the obligation to absorb the VIEs expected losses given that we have issued financial guarantees supporting the liabilities (and in certain cases assets) of a VIE. We also determined for certain transactions that
experienced the aforementioned performance deterioration, that we had the power, through voting rights or similar rights, to direct the activities of



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



certain VIEs that most significantly impact the VIEs economic performance because: a) certain triggers had been breached in these transactions resulting in Ambac having the ability to
exercise certain loss remediation activities, or b) due to the passive nature of the VIEs activities, Ambacs contingent loss remediation rights upon a breach of certain triggers in the future is considered to be the power to direct the
activities that most significantly impact the VIEs economic performance.

Ambac Sponsored VIEs:

A subsidiary of Ambac has transferred financial assets to two special purpose entities. The business purpose of these
entities is to provide certain financial guarantee clients with funding for their debt obligations. These special purpose entities are legal entities that are demonstrably distinct from Ambac. Ambac, its affiliates or its agents cannot unilaterally
dissolve these entities. The permitted activities of these entities are limited to those outlined below. As a result of the adoptions of both ASU-2009-16 and ASU 2009-17 on January 1, 2010, Ambac was required to consolidate these VIEs on
January 1, 2010. As mentioned below, effective March 24, 2010, Ambac was required to deconsolidate these entities because Ambacs policies issued to these entities have been allocated to the Segregated Account of Ambac Assurance. The
consolidation of these entities did not have any effects on Ambacs beginning retained earnings as these entities were accounted for at fair value before initial consolidation. Prior to 2010 and upon deconsolidation, Ambac has elected to
account for its equity interest in these entities at fair value under the fair value option in accordance with ASC Topic 825, Financial Instruments. We believe that the fair value of these investments in these entities provides for greater
transparency for recording profit or loss as compared to the equity method under ASC Topic 323, Investments  Equity Method in Joint Ventures. At September 30, 2010 and December 31, 2009 the fair value of these entities is
$18,758 and $18,843, respectively, and is reported within Other Assets within the Consolidated Balance Sheets. The change in fair value of these entities for the three months ended September 30, 2010 and September 30, 2009, is ($1,753) and
$408, respectively, and is included within Other Income on the Consolidated Statements of Operations. The change in fair value of these entities for the nine months ended September 30, 2010 and September 30, 2009, is ($85) and ($495),
respectively.

As of September 30, 2010, there have been 15 individual transactions with these entities, of which 6 are
outstanding. In each case, Ambac sold fixed income debt obligations to these entities. The fixed income debt obligations are composed of asset-backed securities and utility obligations with a weighted average rating of BBB+ and weighted average life
of 7.5 years at September 30, 2010. The purchase by these entities is financed through the issuance of medium-term notes (MTNs), which are cross-collateralized by the purchased assets. The MTNs have the same expected weighted
average life as the purchased assets. Derivative contracts (interest rate and currency swaps) may be used within the entities for economic hedging purposes only. Hedges are established at the time MTNs are issued to purchase financial assets. The
activities of these entities are contractually limited to purchasing assets from Ambac, issuing MTNs to fund such purchase, executing derivative hedges and obtaining financial guarantee policies with respect to indebtedness incurred. Ambac Assurance
may issue a financial guarantee insurance policy on the assets sold, the MTNs issued and/or the related derivative contracts. As of September 30, 2010, Ambac Assurance had financial guarantee insurance policies issued for all assets, MTNs and
derivative contracts owned and outstanding by the entities.

Insurance premiums paid to Ambac Assurance by these entities are
earned in a manner consistent with other insurance policies, over the risk period. Additionally, any losses incurred on such insurance policies are included in Ambacs Consolidated Statements of Operations. Under the terms of an Administrative
Agency Agreement, Ambac provides certain administrative duties, primarily collecting amounts due on the obligations and making interest payments on the MTNs.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





There were no assets sold to these entities during the nine months ended September 30, 2010 and the year ended
December 31, 2009. Ambac Assurance received premiums for issuing the financial guarantee policies on the assets, MTNs and derivative contracts of $578 and $1,188 for the three months ended September 30, 2010 and 2009, respectively; and
$2,114 and $3,828 for the nine months ended September 30, 2010 and 2009, respectively. Ambac paid claims to these entities of $0 and $0 for the three months ended September 30, 2010 and 2009, respectively, and $24,411 and $42,588 for the
nine months ended September 30, 2010 and 2009, respectively, under these financial guarantee contracts. Ambac also earned fees for providing other services amounting to $5 and $46 for the three months ended September 30, 2010 and 2009,
respectively, and $42 and $154 for the nine months ended September 30, 2010 and 2009, respectively.

Derivative contracts
are provided by Ambac Financial Services to these entities. Consistent with other non-hedging derivatives, Ambac Financial Services accounts for these contracts on a trade date basis at fair value. Ambac Financial Services received $25, and paid
$13,798 for the three months ended September 30, 2010 and 2009, respectively; and received $6,335 and paid $12,248 for the nine months ended September 30, 2010 and 2009, respectively, under these derivative contracts.

Consolidation of VIEs:

Except for consolidations resulting from the adoption of ASU 2009-17 on January 1, 2010, upon initial consolidation of a VIE, we recognized a gain or loss in earnings for the difference between: a)
the fair value of the consideration paid, the fair value of any non-controlling interests and the reported amount of any previously held interests and b) the net amount as measured on a fair value basis, of the assets and liabilities consolidated.
Upon deconsolidation of a VIE, we recognized a gain or loss for the difference between: a) the fair value of any consideration received, the fair value of any retained non-controlling investment in the VIE and the carrying amount of any
non-controlling interest in the VIE and b) the carrying amount of the VIEs assets and liabilities. Gains or losses from consolidation and deconsolidation that are reported in earnings are reported within Financial Guarantee: Income (Loss) on
variable interest entities.

Upon the adoption of ASU 2009-17, Ambac generally measured the assets and liabilities of newly
consolidated VIEs at fair value, as the carrying amount transition method was not practical. The carrying amount transition method (whereby assets, liabilities, and noncontrolling interests of the VIE are recorded in amounts that would have been
carried in the consolidated financial statements if ASU 2009-17 had been effective when Ambac first met the conditions to be the primary beneficiary) was used for one VIE. Ambac has elected to account for the assets and liabilities of the VIEs which
were consolidated at fair value under the fair value option in accordance with ASC Topic 825, Financial Instrumentsin subsequent periods. The fair value option is elected to allow for consistency in the measurement attributes of assets and
liabilities of these VIEs. For VIEs where the assets, liabilities, and noncontrolling interests were measured at initial consolidation under the carrying amount transition method, balances continue to be measured and reported based on other
applicable GAAP guidance.

Impact of adopting ASU 2009-17 and ASU 2009-16

As a result of adopting ASU 2009-17, a cumulative effect gain adjustment of $705,046 was recorded as a net increase to total equity as of
January 1, 2010 (increase in assets of $21,960,991 offset by an increase in liabilities of $21,255,945), which includes changes to the opening balance of retained earnings and accumulated other comprehensive loss, net of taxes as Ambac was
required to consolidate 83 additional VIEs. The types of entities that Ambac was required to consolidate included: (i) RMBS securitization trusts as a result of financial guarantee insurance policies on the senior debt of such trusts;
(ii) collateralized debt obligation trusts as a result of credit derivative contracts issued to investors of the



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



debt of such trust; (iii) international and other asset-backed securitizations as a result of insurance policies guarantying the debt of such financing entities; and (iv) other
transactions, including the Ambac sponsored special purpose entities, Juneau and Aleutian. The net impact of consolidating these VIEs on Ambacs balance sheet at adoption of ASU 2009-17 and ASU 2009-16 was as follows:



| |  |  | Ambac is required to recognize the assets and liabilities of the VIE. The aggregate amount of the VIE assets and liabilities recorded upon adoption
were generally recognized at fair value as described above.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | For a financial guarantee policy issued to a consolidated VIE, Ambac does not reflect the financial guarantee insurance policy in accordance with the
related insurance accounting rules under ASC Topic 944, Financial ServicesInsurance. The financial guarantee policy would be eliminated upon consolidation. Consequently, Ambac eliminated insurance assets (premium receivables,
reinsurance recoverables, deferred ceded premium, subrogation recoverable and deferred acquisition costs) and insurance liabilities (unearned premiums, loss and loss expense reserves and ceded premiums payable) from the Consolidated Balance Sheet.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | For VIEs consolidated as a result of Ambacs credit derivative transactions, the consolidation results in offsetting increases to assets and
liabilities with no transition effect. The credit derivative liabilities remained on Ambacs consolidated financial statements and were not eliminated upon the consolidation of the VIE because Ambacs credit derivative contracts are not
entered into directly with the VIE, but rather entered into with third parties, typically the holders of the notes issued by the VIEs.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | For investment securities owned by Ambac that are debt instruments issued by the VIE, the investment securities balance is eliminated upon
consolidation.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------

The impact of the above items upon adoption of ASU 2009-17 and ASU 2009-16 on
January 1, 2010 is summarized below:



|                                                    |  |   |             |  
|--------------------------------------------------- |  | - | ----------- | -
|Addition of VIE assets                              |  | $ | 22,839,549  |  
|Addition of VIE liabilities                         |  |   | (22,525,422 | )
|                                                    |  |   |             |  
|Net VIE assets added upon adoption                  |  |   | 314,127     |  
|                                                    |  |   |             |  
|Elimination of insurance assets                     |  |   | (833,716    | )
|Elimination of insurance liabilities                |  |   | 1,269,477   |  
|                                                    |  |   |             |  
|Net insurance liabilities eliminated upon adoption  |  |   | 435,761     |  
|                                                    |  |   |             |  
|Elimination of intercompany invested assets         |  |   | (44,842     | )
|                                                    |  |   |             |  
|Net decrease of Shareholders deficit upon adoption |  | $ | 705,046     |  
|                                                    |  |   |             |  

As a result of the establishment of the Segregated Account and the rehabilitation proceedings with respect
to the Segregated Account as discussed in Note 1, including the terms of the management agreement which permit OCI to terminate the agreement with Ambac at any point in time, Ambac no longer has the unilateral power to direct the activities of the
VIEs that most significantly impact the entitys economic performance for those insurance policies that were allocated to the Segregated Account. Accordingly, Ambac deconsolidated 49 VIEs, including 43 RMBS securitization trusts and certain
other entities including the Ambac sponsored VIEs, Juneau and Aleutian, effective March 24, 2010. Juneau and Aleutian are related parties of Ambac. While the RMBS securitization and other trusts are not related parties of Ambac, the company
continues to provide financial guarantee policies on the senior debt or



23



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



assets of such trusts upon deconsolidation. The effect of this deconsolidation was to reverse a significant portion of the transition adjustment to adopt ASU 2009-17 on January 1, 2010 and
to deconsolidate one additional VIE which was consolidated as of December 31, 2009, effectively re-establishing insurance accounting for such transactions.

These deconsolidated VIEs contributed a combined loss of $0 during the three months and $495,077 during nine months ended September 30, 2010, which is included in Financial Guarantee: Income (loss)
income on variable interest entities. The loss on these VIEs is primarily a result of deconsolidation. Additional details of the effect of deconsolidation associated with insurance policies allocated to the Segregated Account are as follows:



| |  |  | Ambac re-established $244,540 in insurance assets (premium receivables, reinsurance recoverables, deferred ceded premium, subrogation recoverable and
deferred acquisition costs), $780,077 in insurance liabilities (unearned premiums, loss and loss expense reserves and ceded premiums payable) and $48,530 in fixed income securities, at fair value as of March 31, 2010 in connection with the
establishment of the Segregated Account. The fair value of available-for-sale securities at deconsolidation becomes the new cost basis for such securities.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Of the VIE assets and liabilities consolidated on January 1, 2010, Ambac removed $4,760,396 and $4,800,857, respectively, upon deconsolidation.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------

As a result of the Settlement Agreement that Ambac Assurance entered into with Counterparties to credit
default swaps during the second quarter of 2010, as discussed in Note 1, Ambac commuted certain CDO of ABS obligations and related financial guaranty insurance policies written by Ambac Assurance with respect to ACPs obligations thereunder.
During the third quarter of 2010, all financial guarantee policies associated with one VIE expired in connection with full pay-down of the guaranteed obligations. Such obligations were Ambacs only variable interests in the associated VIEs.
Accordingly, Ambac no longer has the unilateral power to direct the activities of these VIEs that most significantly impact the entities economic performance, or any further involvement in these VIEs. In connection with these events, Ambac
deconsolidated one VIE during the third quarter of 2010 and 18 VIEs during the nine months ended September 30, 2010. Financial Guarantee: Income (loss) on variable interest entities includes losses of ($511) and ($1,023) during the three and
nine months ended September 30, 2010 associated with these formerly consolidated VIEs, respectively.

As of
September 30, 2010, consolidated VIE assets and liabilities relating to 23 consolidated entities were $19,159,915 and $18,929,669, respectively. As of December 31, 2009, consolidated VIE assets and liabilities were $3,276,615 and
$3,012,170, respectively. Ambac is not primarily liable for the debt obligations issued by the VIEs. Ambac would only be required to make payments on these debt obligations in the event that the issuer of such debt obligations defaults on any
principal or interest due. Additionally, Ambacs creditors do not have rights with regard to the assets of the VIEs. Ambac evaluates the net income statement effects and earnings per share effects to determine attributions between Ambac and
non-controlling interests as a result of consolidating a VIE. Ambac has determined that the net changes in fair value of most consolidated VIE assets and liabilities are attributable to Ambac due to Ambacs interest through financial guarantee
premium and loss payments with the VIE. VIE activities related to entities that remain consolidated as of September 30, 2010 resulted in a gain (loss) of $26,888 and ($8,774) for the three and nine months ended September 30, 2010,
respectively, which is included in Financial Guarantee: Income (loss) income on variable interest entities.

The financial
reports of certain VIEs are prepared by an outside trustee and are not available within the time constraints Ambac requires to ensure the financial accuracy of the operating results. As such, the financial results of certain VIEs are consolidated on
a time lag that is no longer than 90 days.



24



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The table below
provides the fair value of fixed income securities, by asset-type, held by consolidated VIEs as of September 30, 2010 and December 31, 2009:



|                                       |  |                    |           |  |                   |   |         | 
|-------------------------------------- |  | ------------------ | --------- |  | ----------------- | - | ------- | 
|                                       |  | September 30, 2010 |           |  | December 31, 2009 |  
|Investments:                           |  |                    |           |  |                   |   |         | 
|Corporate obligations                  |  | $                  | 1,939,492 |  |                   | $ | 160,518 | 
|Residential mortgage-backed securities |  |                    |          |  |                   |   | 173,066 | 
|Other asset-backed securities          |  |                    |          |  |                   |   | 192,363 | 

The following table
provides supplemental information about the loans held as assets and long-term debt associated with the VIEs for which the fair value option has been elected as of September 30, 2010 and December 31, 2009:



|                    |  |                      |            |  |                          |   |            | 
|------------------- |  | -------------------- | ---------- |  | ------------------------ | - | ---------- | 
|                    |  | Estimated fair value |            |  | Unpaid principal balance |  
|September 30, 2010: |  |                      |            |  |                          |   |            | 
|Loans               |  | $                    | 17,007,648 |  |                          | $ | 17,625,336 | 
|Long-term debt      |  | $                    | 17,130,379 |  |                          | $ | 19,043,010 | 
|                    |  |                     
|December 31, 2009:  |  |                      |            |  |                          |   |            | 
|Loans               |  | $                    | 2,428,352  |  |                          | $ | 2,459,003  | 
|Long-term debt      |  | $                    | 2,789,556  |  |                          | $ | 3,547,842  | 

Loans at
September 30, 2010 included loans receivable that are 90 days or more past due, which had an aggregate unpaid principal balance of $21,353 and fair value of $8,911. See Note 11, Fair Value Measurements for disclosures about the valuation
methodologies used to determine fair value of VIE assets and liabilities.

The total unpaid principal amount of all
outstanding long-term debt associated with the VIEs were $19,247,665 and $3,766,914 as of September 30, 2010 and December 31, 2009, respectively. The range of final maturity dates of the outstanding long-term debt associated with the VIEs
is August 2011 to December 2047 as of September 30, 2010. As of September 30, 2010, the interest rates on the VIE long-term debt ranged from 0.74% to 12.63%.



25



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Variable
Interests in Non-Consolidated VIEs

The following table displays the carrying amount of the assets, liabilities and
maximum exposure to loss of Ambacs variable interests in non-consolidated VIEs resulting from financial guarantee and credit derivative contracts by major underlying asset classes as of September 30, 2010:



|                                |  |                                          |             |  |                    |   |           |                         |  |   |                          |  |  |   |         | 
|------------------------------- |  | ---------------------------------------- | ----------- |  | ------------------ | - | --------- | ----------------------- |  | - | ------------------------ |  |  | - | ------- | 
|                                |  | Carrying Value of Assets and Liabilities |            
|                                |  | MaximumExposure
ToLoss(1)                |             |  | InsuranceAssets(2) |   |           | InsuranceLiabilities(3) |  |   | DerivativeLiabilities(4) | 
|Global Structured Finance:      |  |                                          |             |  |                    |   |           |                         |  |   |                          |  |  |   |         | 
|Collateralized debt obligations |  | $                                        | 22,483,848  |  |                    | $ | 50,111    |                         |  | $ | 118,811                  |  |  | $ | 188,090 | 
|Mortgage-backed  residential   |  |                                          | 38,532,733  |  |                    |   | 1,091,706 |                         |  |   | 3,830,051                |  |  |   | 196     | 
|Mortgage-backed  commercial    |  |                                          | 974,313     |  |                    |   |          |                         |  |   |                         |  |  |   | 7,820   | 
|Other consumer asset-backed     |  |                                          | 13,395,292  |  |                    |   | 166,925   |                         |  |   | 736,388                  |  |  |   | 10,234  | 
|Other commercial asset-backed   |  |                                          | 22,222,423  |  |                    |   | 966,147   |                         |  |   | 931,082                  |  |  |   | 6,891   | 
|Other                           |  |                                          | 8,788,215   |  |                    |   | 147,238   |                         |  |   | 533,973                  |  |  |   | 1,875   | 
|                                |  |                                          |             |  |                    |   |           |                         |  |   |                          |  |  |   |         | 
|Total Global Structured Finance |  |                                          | 106,396,824 |  |                    |   | 2,422,127 |                         |  |   | 6,150,305                |  |  |   | 215,106 | 
|Global Public Finance           |  |                                          | 41,760,416  |  |                    |   | 655,947   |                         |  |   | 779,997                  |  |  |   | 11,849  | 
|                                |  |                                          |             |  |                    |   |           |                         |  |   |                          |  |  |   |         | 
|Total                           |  | $                                        | 148,157,240 |  |                    | $ | 3,078,074 |                         |  | $ | 6,930,302                |  |  | $ | 226,955 | 
|                                |  |                                          |             |  |                    |   |           |                         |  |   |                          |  |  |   |         | 



|(1) | Maximum exposure to loss represents the gross maximum future payments of principal and interest on insured obligations and credit derivative contracts. Ambacs
maximum exposure to loss does not include the benefit of any financial instruments (such as reinsurance or hedge contracts) that Ambac may utilize to mitigate the risks associated with these variable interests.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Insurance assets represents the amount recorded in Premium receivables and Subrogation recoverable for financial guarantee contracts on
Ambacs Consolidated Balance Sheets.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Insurance liabilities represents the amount recorded in Losses and loss expense reserve and Unearned premiums for financial guarantee contracts
on Ambacs Consolidated Balance Sheets.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | Derivative liabilities represents the fair value recognized on credit derivative contracts on Ambacs Consolidated Balance Sheets.
|--- | ----------------------------------------------------------------------------------------------------------------------------------

(4) Net Premiums Earned

Gross premiums are received either upfront (typical of public finance obligations) or in installments (typical of structured finance
obligations). For premiums received upfront, an unearned premium revenue (UPR) liability is established, which is initially recorded as the cash amount received. For installment premium transactions, a premium receivable asset and
offsetting UPR liability is initially established in an amount equal to: (i) the present value of future contractual premiums due (the contractual method) or, (ii) if the underlying insured obligation is a homogenous pool of
assets which are contractually prepayable (the expected method), the present value of premiums to be collected over the expected life of the transaction. An appropriate risk-free rate corresponding to the weighted average life of each
policy and exposure currency is used to discount the future premiums contractually due or expected to be collected. For example, U.S. dollar exposures are discounted using U.S. Treasury rates while exposures denominated in a foreign currency are
discounted using the appropriate risk-free rate for the respective currency. The weighted average risk-free rate and weighted average period of future premiums used to estimate the premium receivable at September 30, 2010 and December 31,
2009 is 2.9% and 2.7%, respectively, and 11.2 years and 10.2 years, respectively. Insured obligations consisting of homogeneous pools for which Ambac uses expected future premiums to estimate the premium receivable and UPR



26



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



include residential mortgage-backed securities and consumer auto loans. As prepayment assumptions change for homogenous pool transactions, or if there is an actual prepayment for a
contractual method installment transaction, the related premium receivable and UPR are adjusted in equal and offsetting amounts with no immediate effect on earnings using new premium cash flows and the then current risk free rate.

For both upfront and installment premium policies, premium revenues are earned over the life of the financial guarantee
contract in proportion to the insured principal amount outstanding at each reporting date (referred to as the level-yield method). For installment paying policies, the premium receivable discount, equating to the difference between the undiscounted
future installment premiums and the present value of future installment premiums, is accreted as premiums earned in proportion to the premium receivable balance at each reporting date. Because the premium receivable discount and UPR are being
accreted into income using different rates, the total premiums earned as a percentage of insured principal is higher in the earlier years and lower in the later years for an installment premium transaction as compared to an upfront premium
transaction.

Below is the premium receivable roll-forward for the period ended September 30, 2010 and December 31,
2009:



|                                                                                        |  |                   |           |   |                  |   |           |  
|--------------------------------------------------------------------------------------- |  | ----------------- | --------- | - | ---------------- | - | --------- | -
|                                                                                        |  | September 30,2010 |           |   | December 31,2009 |  
|Premium receivable at December 31, 2009                                                 |  | $                 | 3,718,158 |   |                  |   |           |  
|Impact of adoption of ASU 2009-17(1)                                                    |  |                   | (670,997  | ) |                  |   |           |  
|                                                                                        |  |                   |           |   |                  |   |           |  
|Premium receivable at January 1, 2010 and 2009                                          |  |                   | 3,047,161 |   |                  | $ | 4,622,858 |  
|Premium payments received                                                               |  |                   | (204,780  | ) |                  |   | (416,280  | )
|Adjustments for changes in expected life of homogeneous pools or contractual cash flows |  |                   | (219,304  | ) |                  |   | (628,421  | )
|Accretion of premium receivable discount                                                |  |                   | 64,622    |   |                  |   | 111,587   |  
|Deconsolidation of certain VIEs(1)                                                      |  |                   | 148,213   |   |                  |   |          |  
|Other adjustments (including foreign exchange)                                          |  |                   | (33,101   | ) |                  |   | 28,414    |  
|                                                                                        |  |                   |           |   |                  |   |           |  
|Premium receivable at September 30, 2010 and December 31, 2009                          |  | $                 | 2,802,811 |   |                  | $ | 3,718,158 |  
|                                                                                        |  |                   |           |   |                  |   |           |  



|(1) | Refer to Note 3 of these unaudited consolidated financial statements for discussion of the new consolidation accounting standard.
|--- | ---------------------------------------------------------------------------------------------------------------------------------

Similar to gross premiums, premiums ceded to reinsurers are paid either upfront or in installments. For premiums paid upfront, a deferred
ceded premium asset is established which is initially recorded as the cash amount paid. For installment premiums, a ceded installment premiums payable liability and offsetting deferred ceded premium asset are initially established in an amount equal
to: i) the present value of future contractual premiums due or, ii) if the underlying insured obligation is a homogenous pool of assets which are contractually prepayable, the present value of premiums expected to be paid over the life of the
transaction. An appropriate risk-free rate corresponding to the weighted average life of each policy and exposure currency is used to discount the future premiums contractually due or expected to be collected. Premiums ceded to reinsurers reduce the
amount of premiums earned by Ambac from its financial guarantee insurance policies. For both up-front and installment premiums, ceded premiums written are primarily recognized in earnings in proportion to and at the same time the related gross
premium revenue is recognized. For premiums paid to reinsurers on an installment basis, Ambac records the present value of future ceding commissions as an offset to ceded premiums payable, using the same assumptions noted above for installment
premiums. The ceding commission revenue associated with the ceding premiums payable is deferred (as an offset to deferred acquisition costs) and recognized in income in proportion to ceded premiums.



27



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The table below
summarizes the future gross undiscounted premiums expected to be collected, and future expected premiums earned, net of reinsurance at September 30, 2010:



|                     |  |                                          |           |  |                                                           |   |           | 
|-------------------- |  | ---------------------------------------- | --------- |  | --------------------------------------------------------- | - | --------- | 
|                     |  | Futurepremiumsexpected tobe collected(1) |           |  | Futureexpectedpremiums 
to beearned, net ofreinsurance(1) |  
|Three months ended:  |  |                                          |           |  |                                                           |   |           | 
|December 31, 2010    |  | $                                        | 65,428    |  |                                                           | $ | 84,359    | 
|                     |  |                                         
|Twelve months ended: |  |                                          |           |  |                                                           |   |           | 
|December 31, 2011    |  |                                          | 236,742   |  |                                                           |   | 319,817   | 
|December 31, 2012    |  |                                          | 222,944   |  |                                                           |   | 295,045   | 
|December 31, 2013    |  |                                          | 209,998   |  |                                                           |   | 269,659   | 
|December 31, 2014    |  |                                          | 200,235   |  |                                                           |   | 249,787   | 
|                     |  |                                         
|Five years ended:    |  |                                          |           |  |                                                           |   |           | 
|December 31, 2019    |  |                                          | 887,738   |  |                                                           |   | 1,042,079 | 
|December 31, 2024    |  |                                          | 762,978   |  |                                                           |   | 784,060   | 
|December 31, 2029    |  |                                          | 636,447   |  |                                                           |   | 569,305   | 
|December 31, 2034    |  |                                          | 408,973   |  |                                                           |   | 331,818   | 
|December 31, 2039    |  |                                          | 160,777   |  |                                                           |   | 129,819   | 
|December 31, 2044    |  |                                          | 39,456    |  |                                                           |   | 35,278    | 
|December 31, 2049    |  |                                          | 10,240    |  |                                                           |   | 10,440    | 
|December 31, 2054    |  |                                          | 1,176     |  |                                                           |   | 2,186     | 
|December 31, 2059    |  |                                          | 5         |  |                                                           |   | 3         | 
|                     |  |                                          |           |  |                                                           |   |           | 
|Total                |  | $                                        | 3,843,137 |  |                                                           | $ | 4,123,655 | 
|                     |  |                                          |           |  |                                                           |   |           | 



|(1) | The future undiscounted premiums expected to be collected and future net premiums earned disclosed in the above table relate to the discounted premium receivable asset
and unearned premium liability recorded on Ambacs balance sheet. The use of contractual lives for many bond types which do not have homogeneous pools of underlying collateral is required in the calculation of the premium receivable as
described above, which results in a higher premium receivable balance than if expected lives were considered. If installment paying policies are retired early as a result of rate step-ups or other early retirement provision incentives for the
issuer, premiums reflected in the premium receivable asset and amounts reported in the above table for such policies may not be collected in the future.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

When an issue insured by Ambac Assurance has been retired, including those retirements due to refunding or calls, the remaining unrecognized premium is recognized at that time to the extent the financial
guarantee contract is legally extinguished. Accelerated premium revenue for retired obligations for the three and nine months ended September 30, 2010 was $30,004 and $96,450, respectively. Accelerated premium revenue for retired obligations
for the three and nine months ending September 30, 2009 were $90,325 and $165,126, respectively. Certain obligations insured by Ambac have been legally defeased whereby government securities are purchased by the issuer with the proceeds of a
new bond issuance, or less frequently with other funds of the issuer, and held in escrow (a pre-refunding). The principal and interest received from the escrowed securities are then used to retire the Ambac-insured obligations at a future date
either to their maturity date or a specified call date. Ambac has evaluated the provisions in certain financial guarantee insurance policies issued on legally defeased obligations and determined those policies have not been legally extinguished and,
therefore, premium revenue recognition has not been accelerated.



28



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The table below
shows premiums written on a gross and net basis for the three and nine month periods ended September 30, 2010 and 2009:



|                       |      |                                 |        |      |                                |    |         |   |  |      |         |   |  |    |         |  
|---------------------- | ---- | ------------------------------- | ------ | ---- | ------------------------------ | -- | ------- | - |  | ---- | ------- | - |  | -- | ------- | -
|                       |      | Three Months
EndedSeptember 30, |        |      | Nine Months
EndedSeptember 30, |   
|                       | 2010 |                                 |        | 2009 |                                |    | 2010    |   |  | 2009 |        
|Revenues:              |      |                                 |        |      |                                |    |         |   |  |      |         |   |  |    |         |  
|Financial Guarantee:   |      |                                 |        |      |                                |    |         |   |  |      |         |   |  |    |         |  
|Gross premiums written |      | $                               | 53,200 |      |                                | ($ | 231,213 | ) |  | ($   | 137,935 | ) |  | ($ | 388,884 | )
|Ceded premiums written |      |                                 | 45,583 |      |                                |    | 389,679 |   |  |      | 62,521  |   |  |    | 577,225 |  
|                       |      |                                 |        |      |                                |    |         |   |  |      |         |   |  |    |         |  
|Net premiums written   |      | $                               | 98,783 |      |                                | $  | 158,466 |   |  | ($   | 75,414  | ) |  | $  | 188,341 |  
|                       |      |                                 |        |      |                                |    |         |   |  |      |         |   |  |    |         |  

(5) Losses and Loss Expenses

Ambacs financial guarantee insurance policies generally pay scheduled interest and principal if the issuer of the insured obligation fails to meet its obligation. Until the Segregated Account
Rehabilitation Plan is approved, it is anticipated that no claims will be paid on Segregated Account Policies, except as approved by the rehabilitation court. The loss and loss expense reserve (loss reserve) policy for financial
guarantee insurance discussed in this footnote relates only to Ambacs non-derivative insurance business. The policy for derivative contracts is discussed in Derivative Contracts below. Under ASC Topic 944, a loss reserve is
recorded on the balance sheet on a policy-by-policy basis for the excess of: (a) the present value of expected net cash outflows to be paid under an insurance contract, i.e. the expected loss, over (b) the UPR for that contract. To the
extent (a) is less than (b), no loss reserve is recorded. Changes to the loss reserve in subsequent periods are recorded as a loss and loss expense on the income statement. Expected losses are based upon estimates of the ultimate aggregate
losses inherent in the non-derivative financial guarantee portfolio as of the reporting date. The evaluation process for determining expected losses is subject to certain estimates and judgments based on our assumptions regarding the probability of
default and expected severity of performing credits as well as our active surveillance of the insured book of business and observation of deterioration in the obligors credit standing.

Ambacs loss reserves are based on managements on-going review of the non-derivative financial guarantee credit portfolio.
Active surveillance of the insured portfolio enables Ambacs surveillance group to track credit migration of insured obligations from period to period and update internal classifications and credit ratings for each transaction. Non-adversely
classified credits are assigned a Class I or Survey List (SL) rating while adversely classified credits are assigned a rating of Class IA through Class V. The criteria for an exposure to be assigned an adversely classified credit rating
includes the deterioration of an issuers financial condition, underperformance of the underlying collateral (for collateral dependent transactions such as mortgage-backed securitizations), poor performance by the servicer of the underlying
collateral and other adverse economic events or trends. The servicer of the underlying collateral of an insured securitization transaction is a consideration in assessing credit quality because the servicers performance can directly impact the
performance of the related issue. For example, a servicer of a mortgage-backed securitization that does not remain current in its collection efforts could cause an increase in the delinquency and potential default of the underlying obligation.
Similarly, loss severities increase when a servicer does not effectively handle loss mitigation activities such as (i) the advancing of delinquent principal and interest and of default related expenses which are deemed to be recoverable by the
servicer, (ii) pursuit of loan charge-offs which maximize cash flows from the mortgage loan pool, and (iii) foreclosure and real estate owned disposition strategies and timelines.



29



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





All credits are
assigned risk classifications by the Surveillance Group using the following guidelines:

CLASS I  Fully
Performing  Meets Ambac Criteria with Remote Probability of Claim

Credits that demonstrate adequate
security and structural protection with a strong capacity to pay interest, repay principal and perform as underwritten. Factors supporting debt service payment and performance are considered unlikely to change and any such change would not have a
negative impact upon the fundamental credit quality.

SURVEY LIST (SL)  Investigation of Specific Condition
or Weakness Underway

Credits that require additional analysis to determine if adverse classification is
warranted. These credits may lack information or demonstrate a weakness but further deterioration is not expected.

CLASS IA  Potential Problem with Risks to be Dimensioned

Credits that are fully current and monetary default or claims-payment are not anticipated. The payors or issuers financial
condition may be deteriorating or the credits may lack adequate collateral. A structured financing may also evidence weakness in its fundamental credit quality as evidenced by its under-performance relative to its modeled projections at
underwriting, issues related to the servicers ability to perform, or questions about the structural integrity of the transaction. While these credits may still retain an investment grade rating, they usually have experienced or are vulnerable
to a ratings downgrade. Further investigation is required to dimension and correct any deficiencies. A complete legal review of documents may be required. An action plan should be developed with triggers for future classification changes upward or
downward.

CLASS II  Substandard Requiring Intervention

Credits whose fundamental credit quality has deteriorated to the point that timely payment of debt service may be jeopardized by adversely
developing trends of a financial, economic, structural, managerial or political nature. No claim payment is currently foreseen but the probability of loss or claim payment over the life of the transaction is now existent (10% or greater
probability). Class II credits may be borderline or below investment grade (BBB- to B). Prompt and sustained action must be taken to execute a comprehensive loss mitigation plan and correct deficiencies.

CLASS III  Doubtful with Clear Potential for Loss

Credits whose fundamental credit quality has deteriorated to the point that timely payment of debt service has been or will be jeopardized
by adverse trends of a financial, economic, structural, managerial or political nature which, in the absence of positive change or corrective action, are likely to result in a loss. The probability of monetary default or claims paying over the life
of the transaction is 50% or greater. Full exercise of all available remedial actions is required to avert or minimize losses. Class III credits will generally be rated below investment grade (B to CCC).



30



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





CLASS IV
 Imminent Default or Defaulted

Monetary default or claims payment has occurred or is expected
imminently. Class IV credits are generally rated D.

CLASS V  Fully Reserved

The credit has defaulted and payments have occurred. The claim payments are scheduled and known, reserves have been established to fully
cover such claims, and no claim volatility is expected.

The population of credits evaluated in Ambacs loss reserve
process are: i) all adversely classified credits (Class IA through V) and ii) non-adversely classified credits (Class I and SL) which had an internal Ambac rating downgrade since the transactions inception. One of two approaches is then
utilized to estimate expected losses to ultimately determine if a loss reserve should be established. The first approach is a statistical expected loss approach, which considers the likelihood of all possible outcomes. The base case
statistical expected loss is the product of: (i) the net par outstanding on the credit; (ii) internally developed historical default information (taking into consideration internal ratings and average life of an obligation);
(iii) internally developed loss severities; and (iv) a discount factor. The loss severities and default information are based on rating agency information, are specific to each bond type and are established and approved by Ambacs
senior management. For certain credit exposures, Ambacs additional monitoring and loss remediation efforts may provide information relevant to adjust this estimate of base case statistical expected losses. As such,
management-approved loss severities used in estimating the base case statistical expected losses may be adjusted based on the professional judgment of the surveillance analyst monitoring the credit with the approval of senior management.
Analysts may accept the base case statistical expected loss as the best estimate of expected loss or assign multiple probability-weighted severities to determine an adjusted statistical expected loss that better reflects a given
transactions potential severity.

The second approach entails the use of more precise estimates of expected net cash
outflows (future claim payments, net of potential recoveries, expected to be paid to the holder of the insured financial obligation). Ambacs surveillance group will consider the likelihood of all possible outcomes and develop cash flow
scenarios. This approach can include the utilization of market accepted software tools to develop net claim payment estimates. We have utilized such tools for residential mortgage-backed exposures as well as certain other types of exposures. These
tools, in conjunction with detailed data of the historical performance of the collateral pools, assist Ambac in the determination of certain assumptions, such as default and voluntary prepayment rates, which are needed in order to estimate expected
future net claim payments. In this approach a probability-weighted expected loss estimate is developed based on assigning probabilities to multiple net claim payment scenarios and applying an appropriate discount factor. A loss reserve is recorded
for the excess, if any, of estimated expected losses (net cash outflows) using either of these two approaches, over UPR. For certain policies, estimated potential recoveries exceed estimated future claim payments because all or a portion of such
recoveries relate to claims previously paid. The expected net cash inflows for these policies are recorded as a subrogation recoverable asset.

The discount factor applied to both of the above described approaches is based on a risk-free discount rate corresponding to the remaining expected weighted-average life of the exposure and the exposure
currency. The discount factor is updated for the current risk-free rate each reporting period. The weighted average risk-free rate used to discount loss reserves at September 30, 2010 was 2.26%.

Loss expenses are established for anticipated expenses associated with loss mitigation strategies, such as legal and consulting costs for
credits which may or may not have an associated loss reserve. Ambac establishes loss expense reserves based on our estimate of expected net cash outflows for loss expenses.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Additional
surveillance activities applied to adversely classified credits can include various actions by Ambac. The most common actions include obtaining detailed appraisal information on collateral, more frequent meetings with the issuers or
servicers management to review operations, financial condition and financial forecasts and more frequent analysis of the issuers financial statements. Senior management meets frequently with the surveillance group to review the status of
their work to determine the adequacy of Ambacs loss reserves and make any necessary adjustments.

As a consequence of
the Segregated Account Rehabilitation Proceedings, the rehabilitator retains operational control and decision-making authority with respect to all matters related to the Segregated Account, including surveillance, remediation and loss mitigation.
Similarly, by virtue of the contracts executed between Ambac Assurance and the Segregated Account in connection with the establishment, and subsequent rehabilitation, of the Segregated Account, the rehabilitator retains the discretion to oversee and
approve certain actions taken by Ambac Assurance in respect of assets and liabilities which remain in Ambac Assurance. As such, the discussion of Ambacs risk management practices is qualified by reference to the rehabilitators exercise
of its discretion to alter or eliminate any of these risk management practices.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The table below
summarizes information related to policies currently included in Ambacs loss reserves at September 30, 2010:

Surveillance Categories



|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|------------------------------------------------------------------- |  | ---- | --------- | - | -- |  | ------- | -- |  |  | --------- | - |  | -- | ---------- | - | - |  | ---------- | ----- |  |  | --- | - |  |  | ---------- | -
|                                                                    |  | I/SL |           |   | IA |  |         | II |  |  | III       |   |  | IV |            |   | V |  |            | Total | 
|Number of policies                                                  |  |      | 28        |   |    |  | 9       |    |  |  | 35        |   |  |    | 135        |   |   |  | 120        |       |  |  | 1   |   |  |  | 328        |  
|Remaining weighted-average contract period (inyears)                |  |      | 5         |   |    |  | 9       |    |  |  | 17        |   |  |    | 19         |   |   |  | 9          |       |  |  | 10  |   |  |  | 14         |  
|Gross insured contractual payments outstanding:                     |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Principal                                                           |  |      | 2,088,253 |   |    |  | 511,322 |    |  |  | 2,548,273 |   |  |    | 17,509,799 |   |   |  | 14,137,834 |       |  |  | 47  |   |  |  | 36,795,528 |  
|Interest                                                            |  |      | 496,391   |   |    |  | 148,248 |    |  |  | 2,881,579 |   |  |    | 11,956,474 |   |   |  | 4,061,325  |       |  |  | 27  |   |  |  | 19,544,044 |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Total                                                               |  |      | 2,584,644 |   |    |  | 659,570 |    |  |  | 5,429,852 |   |  |    | 29,466,273 |   |   |  | 18,199,159 |       |  |  | 74  |   |  |  | 56,339,572 |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Gross undiscounted claim liability                                  |  |      | 25,334    |   |    |  | 59,177  |    |  |  | 87,829    |   |  |    | 2,894,586  |   |   |  | 6,813,859  |       |  |  | 74  |   |  |  | 9,880,859  |  
|Discount, gross claim liability                                     |  |      | (914      | ) |    |  | (4,788  | )  |  |  | (6,220    | ) |  |    | (361,258   | ) |   |  | (1,161,423 | )     |  |  | (26 | ) |  |  | (1,534,629 | )
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Gross claim liability before all subrogation and before reinsurance |  |      | 24,420    |   |    |  | 54,389  |    |  |  | 81,609    |   |  |    | 2,533,328  |   |   |  | 5,652,436  |       |  |  | 48  |   |  |  | 8,346,230  |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Less:                                                               |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Gross RMBS subrogation(1)                                           |  |      |          |   |    |  |        |    |  |  |          |   |  |    |           |   |   |  | (2,497,955 | )     |  |  |    |   |  |  | (2,497,955 | )
|Discount, RMBS subrogation                                          |  |      |          |   |    |  |        |    |  |  |          |   |  |    |           |   |   |  | 76,658     |       |  |  |    |   |  |  | 76,658     |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Discounted RMBS subrogation, before reinsurance                     |  |      |          |   |    |  |        |    |  |  |          |   |  |    |           |   |   |  | (2,421,297 | )     |  |  |    |   |  |  | (2,421,297 | )
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Less:                                                               |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Gross other subrogation(2)                                          |  |      |          |   |    |  | (2,128  | )  |  |  | (16       | ) |  |    | (764,763   | ) |   |  | (828,815   | )     |  |  |    |   |  |  | (1,595,722 | )
|Discount, other subrogation                                         |  |      |          |   |    |  | 109     |    |  |  |          |   |  |    | 193,983    |   |   |  | 137,488    |       |  |  |    |   |  |  | 331,580    |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Discounted other subrogation, before reinsurance                    |  |      |          |   |    |  | (2,019  | )  |  |  | (16       | ) |  |    | (570,780   | ) |   |  | (691,327   | )     |  |  |    |   |  |  | (1,264,142 | )
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Gross claim liability, net of all subrogation, before reinsurance   |  |      | 24,420    |   |    |  | 52,370  |    |  |  | 81,593    |   |  |    | 1,962,548  |   |   |  | 2,539,812  |       |  |  | 48  |   |  |  | 4,660,791  |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Less: Unearned premium reserves                                     |  |      | (12,370   | ) |    |  | (11,332 | )  |  |  | (38,468   | ) |  |    | (291,764   | ) |   |  | (156,839   | )     |  |  |    |   |  |  | (510,773   | )
|Plus: Loss adjustment expenses reserves                             |  |      |          |   |    |  |        |    |  |  |          |   |  |    | 15,062     |   |   |  | 98,502     |       |  |  |    |   |  |  | 113,564    |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Claim liability reported on Balance Sheet, before reinsurance(3)    |  |      | 12,050    |   |    |  | 41,038  |    |  |  | 43,125    |   |  |    | 1,685,846  |   |   |  | 2,481,475  |       |  |  | 48  |   |  |  | 4,263,582  |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  
|Reinsurance recoverable reported on Balance Sheet                   |  |      | 822       |   |    |  | 520     |    |  |  | 3,296     |   |  |    | 90,238     |   |   |  | 31,582     |       |  |  |    |   |  |  | 126,458    |  
|                                                                    |  |      |           |   |    |  |         |    |  |  |           |   |  |    |            |   |   |  |            |       |  |  |     |   |  |  |            |  



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





|    |  |                                                                                                                                                                                                                                                              |  |   |            |   |  |  |  | 
|--- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | - | ---------- | - |  |  |  | 
|(1) |  | RMBS subrogation represents Ambacs estimate of subrogation recoveries from RMBS transactionsponsors for representations and warranty breaches. Please see
Representation and WarrantyBreaches by RMBS Transaction Sponsors below for detailed discussion. |  |   |            |   |  | 
|(2) |  | Other subrogation represents subrogation other than RMBS subrogation as defined in (1) above.                                                                                                                                                                |  |   |            |   |  | 
|(3) |  | Claim liability reported is included in the Consolidated Balance Sheets as follows:                                                                                                                                                                          |  |   |            |   |  | 
|    |  | Loss and loss expense reserve (net of potential remediation subrogation of $679,217)                                                                                                                                                                         |  | $ | 5,510,541  |   |  |  |  | 
|    |  | Subrogation recoverable (includes gross potential remediation of $1,742,081)                                                                                                                                                                                 |  |   | (1,222,216 | ) |  |  |  | 
|    |  | Other assets (within)                                                                                                                                                                                                                                        |  |   | (24,744    | ) |  |  |  | 
|    |  |                                                                                                                                                                                                                                                              |  |   |            |   |  |  |  | 
|    |  |                                                                                                                                                                                                                                                              |  | $ | 4,263,581  |   |  |  |  | 
|    |  |                                                                                                                                                                                                                                                              |  |   |            |   |  |  |  | 

Loss reserves on non-defaulted credits were $1,463,916 and $2,646,517 at September 30, 2010
and December 31, 2009, respectively. These loss reserves were comprised of 204 credits with net par of $20,180,247 at September 30, 2010 and 130 credits with net par of $21,424,301 at December 31, 2009. Loss reserves on defaulted
credits were $2,571,589 and $1,098,352 at September 30, 2010 and December 31, 2009, respectively, comprising 124 credits with net par outstanding of $14,333,040 at September 30, 2010 and 85 credits with net par outstanding of
$11,345,697 at December 31, 2009. Included in loss reserves at September 30, 2010 are $1,083,796 of claims that were presented and not paid under the claim moratorium on the Segregated Account, as required by the OCI. Loss expense reserves
were also established for significant surveillance and mitigation expenses associated with adversely classified credits, including legal costs associated with Representation and Warranty Breaches by RMBS transaction sponsors. Total loss expense
reserves were $110,625 and $32,452 at September 30, 2010 and December 31, 2009, respectively. Loss reserves ceded to reinsurers at September 30, 2010 and December 31, 2009 were $118,388 and $64,311, respectively. Amounts were
included in reinsurance recoverable on paid and unpaid losses on the Consolidated Balance Sheet.

Representation and
Warranty Breaches by RMBS Transaction Sponsors:

In an effort to better understand the unprecedented levels of mortgage
delinquencies, Ambac engaged consultants with significant mortgage lending experience to review the underwriting documentation for mortgage loans underlying certain insured RMBS transactions. Transactions which have exhibited exceptionally poor
performance were chosen for further examination of the underwriting documentation supporting the underlying loans. Factors Ambac believes to be indicative of poor performance include (i) increased level of early payment defaults,
(ii) significant number of loan liquidations or charge-offs and resulting high level of losses, and (iii) rapid elimination of credit protections inherent in the transactions structures. With respect to item (ii), loan
liquidations refers to loans for which the servicer has liquidated the related collateral and the securitization has realized losses on the loan; charge-offs refers to loans which have been written off as uncollectible by the
servicer, thereby generating no recoveries to the securitization, and may also refer to the unrecovered balance of liquidated loans. In either case, the servicer has taken such actions as it has deemed viable to recover against the collateral, and
the securitization has incurred losses to the extent such actions did not fully repay the borrowers obligations. Generally, the sponsor of the transaction provides representations and warranties with respect to the securitized loans including
the loan characteristics, the absence of fraud or other misconduct in the origination process, including those attesting to the compliance of home loans with the prevailing underwriting policies. Per the transaction documents, the sponsor of the
transaction is contractually obligated to repurchase, cure or substitute any loan that breaches the representations and warranties. Substitution is generally limited to two years from the closing of the transaction and the cure remedy is permitted
only to the extent cure is possible.

Subsequent to the forensic exercise of examining loan files to ascertain whether the
loans conformed to the representations and warranties, we submit nonconforming loans to the sponsor for repurchase. For all of the transactions reviewed by Ambac, the substitution remedy is no longer available



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



(i.e., more than two years have lapsed since the closing of the transaction). To effect a repurchase, depending on the transaction, the sponsor is contractually required to repurchase the loan
(a) for loans which have not been liquidated or charged off, either at (i) the current unpaid principal balance of the loan, (ii) the current unpaid principal balance plus accrued unpaid interest, or (iii) the current unpaid
principal balance plus accrued interest plus unreimbursed servicer advances/expenses and/or trustee expenses resulting from the breach of representations and warranties that trigger the repurchase, and (b) for a loan that has already been
liquidated or charged-off, the amount of the realized loss (which in certain cases excludes accrued unpaid interest). Notwithstanding the material breaches of representations and warranties, up until the establishment of the Segregated Account and
associated Segregated Account Rehabilitation Proceeding, Ambac had continued to pay claims submitted under the financial guarantee insurance policies related to these securitizations and will, once again, pay claims in accordance with the
Rehabilitation Plan after the plan has been approved in court. In cases where loans are repurchased by a sponsor, the effect is typically to offset current period losses and then to increase the over-collateralization of the securitization,
depending on the extent of loan repurchases and the structure of the securitization. Specifically, the repurchase price is paid by the sponsor to the securitization trust which holds the loan. The cash becomes an asset of the trust, replacing the
loan that was repurchased by the sponsor. On a monthly basis the cash received related to loan repurchases by the sponsor is aggregated with cash collections from the underlying mortgages and applied in accordance with the trust indenture payment
waterfall. This payment waterfall typically includes principal and interest payments to the note holders, various expenses of the trust and reimbursements to Ambac, as financial guarantor, for claim payments made in previous months. With respect to
transactions for which Ambac has recorded estimated subrogation recoveries (as further described below), Ambac insures all or a portion of the senior tranches in the capital structure of the issuer, thus any sponsor cash received from loan
repurchases would entirely benefit Ambac or Ambac insured note holders. Notwithstanding the reimbursement of previous monthly claim payments, to the extent there continues to be insufficient cash in the waterfall in the current month to make
scheduled principal and interest payments to the note holders, Ambac is required to make additional claim payments to cover the shortfall.

Ambacs estimate of subrogation recoveries includes two components: (1) estimated dollar amounts of loans with material breaches of representations and warranties based on an extrapolation of
the breach rate identified in a random sample of loans taken from the entire population of loans in a securitization (random sample approach); and (2) dollar amount of actual loans with identified material breaches of
representations and warranties discovered from samples of impaired loans in a securitization (adverse sample approach). We do not include estimates of damages in our estimate of subrogation recoveries under either approach. The amount
the sponsors believe to be their liability for these breaches is not known; however, certain sponsors have disclosed that reserves have been established related to claims by financial guarantors and others for breaches of representations and
warranties.

The random sample approach to estimate subrogation recoveries was based on obtaining a statistically valid random
sample for all the original loans in the pool. First, a breach rate was computed by dividing (i) the loans identified in sample as having breached representations and warranties by (ii) the total sample size. Second, an
extrapolation to the entire loan pool was performed by multiplying the breach rate by the sum of (a) the current unpaid loan pool balance (CULPB) plus (b) realized losses resulting from loan liquidations or charge-offs to date,
to compute an estimated repurchase obligation. The CULPB includes principal only on non-charged-off and non-liquidated loans, and the realized losses include principal, interest and unreimbursed servicer advances and/or trustee expenses on
charged-off and liquidated loans. As a result, the CULPB and realized loss components, which are used in extrapolating the estimated repurchase obligation, do not precisely correspond to each sponsors contractual repurchase obligation as
defined in the transaction documents. Nonetheless, the CULPB and realized loss components are provided through trustee reports we receive in the normal course of our surveillance of these transactions and is the best information we have available to
estimate the sponsors



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



repurchase obligation under the random sample approach. Third, a realization factor (which incorporates Ambacs views about the uncertainties surrounding the litigation process and/or
settlement negotiation) was then applied to the estimated repurchase obligation to compute the undiscounted subrogation recovery. The realization factor was developed from a range of realization factors using Ambacs own assumptions about the
likelihood of outcomes based on all the information available to it including (i) discussions with external legal counsel and their views on ultimate settlement, (ii) recent experience with loan put back negotiations where the existence of
a material breach was debated and negotiated at the loan level, and (iii) the pervasiveness of the breach rates. Finally, a discount factor was applied (using the assumptions discussed in the paragraph subsequent to the next table below) to the
undiscounted subrogation recovery to compute the estimated subrogation recovery.

Due to the nature of the sampling
methodology used, the subrogation recovery estimate Ambac has recorded based on the above-described random sample approach includes all breached loans which Ambac believes the sponsor is contractually required to repurchase, including extrapolation
to a loan pool which includes loans which have not defaulted, and, in fact, may not default in the future (i.e. performing loans). In theory, a loan that continues to perform in accordance with its terms through repayment should have little or no
effect on Ambacs anticipated claim payments, regardless of whether or not the sponsor repurchases the loan. In other words, since there will be sufficient cash flows to service the notes in either situation (i.e. whether cash is received from
a sponsor loan repurchase or whether cash is received from the underlying performing loan), there should be no claim payment under Ambacs insurance policy in respect of such loans. Nonetheless, Ambac may have recorded a subrogation recovery
for certain performing loans because it believes the breaches of representations and warranties are so pervasive that a court would deem it impractical to have the sponsor re-underwrite every loan in a given transaction and repurchase only
individual loans that have breached. Rather, Ambac believes there is precedent for the utilization of a statistical sampling and extrapolation methodology across a population to prove liability and damages where it would be impractical to make a
determination on an individual loan basis. Ambac believes a court would likely award damages based on a reasonable methodology, such as our random sample approach, which damages would be either remitted directly to Ambac, placed in the
securitization trust, or otherwise held under an arrangement for the benefit of the securitization trust; however, Ambac believes that under such an approach individual loans would not be repurchased from the trust. In either case, Ambac believes
those damages would compensate Ambac for past and future claim payments. Consequently, since the sponsor is contractually obligated to repurchase those loans which breach representations and warranties regardless of whether they are current or
defaulted, Ambac believes the appropriate measure in estimating subrogation recoveries is to apply the breach rate to both performing and defaulted loans.

The adverse sample approach to estimate subrogation recoveries was based on a sample taken from those loans in the pool that were impaired, meaning loans greater than 90 days past due, charged-off, in
foreclosure, REO or bankruptcy. The estimated subrogation recovery under this approach represents 100% of the original principal balance of those specific loans identified as having not met the underwriting criteria or otherwise breaching
representations and warranties (i.e. the adverse loans), multiplied by a discount factor using the same assumptions used for the discount factor in the random sample approach. For transactions subject to the adverse sample approach, given
Ambacs limitations in developing a statistically valid random sample and its belief that the subrogation estimate under this approach is inherently conservative (for reasons discussed below), Ambac did not attempt to develop
probability-weighted alternative cash flow scenarios as it believes such results would not be meaningful. The three primary differences between this adverse sample approach and the random sample approach, discussed in the previous paragraph, are as
follows:



| | (i) | There is no extrapolation to the CULPB and realized losses under the adverse sample approach. At September 30, 2010, the adverse sample approach
is used for 15 transactions that are with the same sponsor, who has limited our access to the underlying loan files and, therefore, a
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



| | statistically valid random sample from the entire loan pool cannot be selected. This is in contrast to the transactions subject to the random sample approach where Ambacs access to
individual loan files has not been limited and the Company, therefore, has been able to develop a statistically valid representative sample.
| | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | The adverse sample approach is only based on the original principal balance rather than the principal balance at the time of default and liquidation or charge-off.
Furthermore, it does not include other components of the sponsors contractual repurchase obligation where the sponsor is also obligated to repay accrued interest, servicer advances and/or trustee expenses. The adverse sample approach relies on
individual loan level data where all of the components of the sponsors buyback obligation have not been specifically provided by the sponsor nor is easily estimable. For example, home equity lines of credit (HELOCs) are revolving loans whose
principal balances may be higher or lower at the time of default and liquidation or charge-off than at the time of origination. However, given the limited information available to Ambac in estimating such principal balances at the time of
liquidation or charge-off, the original principal balance must be used in calculating subrogation recoveries. Another example is closed-end second lien RMBS where the interest due on a particular loan will be a function of the length of time of
delinquency prior to liquidation or charge-off, and cannot be readily estimated. Incremental costs, including fees and servicer advances for such items as property taxes and maintenance, are likewise not readily estimated.
| | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | Unlike the random sample approach, for the adverse sample approach Ambac did not apply a realization factor to the estimated repurchase obligation for the adverse loans
related to uncertainties surrounding settlement negotiation or litigation processes given that the adverse loans selected represent only approximately 35% of the value of the impaired population of loans, only approximately 4% of the value of the
original loans in the pool, and the breach rate in the sample was pervasive. In other words, because the adverse loans selected represent only a fraction of the population of impaired loans and a very small proportion of the original loans in the
pools, Ambac believes there is an ample population of additional impaired loans where breaches of representations and warranties exist that could potentially replace any adverse loans it already identified that might be successfully challenged in
negotiations or litigation.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Ambac has updated
its estimated subrogation recoveries from $2,046,788 ($2,026,266 net of reinsurance) at December 31, 2009 to $2,421,298 ($2,395,456 net of reinsurance) at September 30, 2010. The balance of subrogation recoveries and the related claim
liabilities at September 30, 2010 and December 31, 2009 are as follows:



|                |  |                    |    |     |     |  |           |             |  |  |            |   |  |  |          |  
|--------------- |  | ------------------ | -- | --- | --- |  | --------- | ----------- |  |  | ---------- | - |  |  | -------- | -
|                |  | September 30, 2010 |   
|Method          |  | Count              |    |     | GCL |  |           | Subrogation |  |  | GCL After  |  
|Adverse samples |  |                    | 15 | (2) |     |  | 1,587,749 |             |  |  | (708,518   | ) |  |  | 879,231  |  
|Random samples  |  |                    | 12 | (3) |     |  | 958,152   |             |  |  | (1,712,780 | ) |  |  | (754,628 | )
|                |  |                    |    |     |     |  |           |             |  |  |            |   |  |  |          |  
|Totals          |  |                    | 27 |     |     |  | 2,545,901 |             |  |  | (2,421,298 | ) |  |  | 124,603  |  
|                |  |                    |    |     |     |  |           |             |  |  |            |   |  |  |          |  



|                |  |                   |    |  |     |  |           |             |  |  |            |   |  |  |          |  
|--------------- |  | ----------------- | -- |  | --- |  | --------- | ----------- |  |  | ---------- | - |  |  | -------- | -
|                |  | December 31, 2009 |   
|Method          |  | Count             |    |  | GCL |  |           | Subrogation |  |  | GCL After  |  
|Adverse samples |  |                   | 10 |  |     |  | 759,369   |             |  |  | (460,617   | ) |  |  | 298,752  |  
|Random samples  |  |                   | 9  |  |     |  | 937,272   |             |  |  | (1,586,171 | ) |  |  | (648,899 | )
|                |  |                   |    |  |     |  |           |             |  |  |            |   |  |  |          |  
|Totals          |  |                   | 19 |  |     |  | 1,696,641 |             |  |  | (2,046,788 | ) |  |  | (350,147 | )
|                |  |                   |    |  |     |  |           |             |  |  |            |   |  |  |          |  



|(1) | The amount of recorded subrogation recoveries related to each securitization is limited to ever-to-date paid losses plus the present value of projected future paid
losses for each policy. To the extent significant losses have been paid but not yet recovered, the recorded amount of subrogation recoveries may exceed the projected future paid losses for a given policy. The net cash inflow for these policies is
recorded as a Subrogation recoverable asset. For those transactions where the subrogation recovery is less than projected future paid losses, the net cash outflow for these policies is recorded as a Loss and loss expense
reserve liability. Of the $2,421,298 of subrogation recoveries recorded at September 30, 2010, $1,742,081 was included in Subrogation recoverable and $679,217 was included in Loss and loss expense reserves.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Of these 15 transactions, 10 contractually require the sponsor to repurchase loans at the unpaid principal balance and 5 contractually require the sponsor to repurchase
loans at unpaid principal plus accrued interest. However, for reasons discussed above in the description of the adverse sample approach, our estimated subrogation recovery for these transactions may not include all the components of the
sponsors contractual repurchase obligation.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Of these 12 transactions, 3 contractually require the sponsor to repurchase loans at unpaid principal plus accrued interest and 9 contractually require the sponsor to
repurchase loans at unpaid principal plus accrued interest plus servicer advances/expense and/or trustee expenses. However, for reasons discussed above in the description of the random sample approach, our estimated subrogation recovery for these
transactions may not include all the components of the sponsors contractual repurchase obligation.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

While
the obligation by sponsors to repurchase loans with material breaches is clear, generally the sponsors have not yet honored those obligations. Ambacs approach to resolving these disputes has included negotiating with individual sponsors at the
transaction level and in some cases at the individual loan level and has resulted in the repurchase of some loans. Ambac has utilized the results of the above described loan file examinations to make demands for loan repurchases from sponsors or
their successors and, in certain instances, as a part of the basis for litigation filings. Ambac has initiated and will continue to initiate lawsuits seeking compliance with the repurchase obligations in the securitization documents. Ambac estimates
that it will take approximately three years from the initiation of litigation with the



38



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



sponsor to ultimate resolution. Based on this estimate as a basis for projecting the future subrogation cash flows, Ambac assumes, on average, approximately three and a half years to collect
recoveries, discounted at a risk-free rate of 1.8%. Estimated recoveries will continue to be revised and supplemented as the scrutiny of the mortgage loan pools progresses.

We have performed the above-mentioned, detailed examinations on a variety of second-lien transactions and five first-lien transactions that have experienced exceptionally poor performance. However, the
loan file examinations and related estimated recoveries we have reviewed and recorded to date have been limited to only those transactions whose sponsors (or their successors) are subsidiaries of large financial institutions, all of which carry an
investment grade rating from at least one nationally recognized rating agency. A total of seven sponsors represent the 27 transactions which have been reviewed as of September 30, 2010. While our contractual recourse is generally to the
sponsor/subsidiary, rather than to the financial institutional parent, each of these financial institutions has significant financial resources and an ongoing interest in mortgage finance, and we therefore believe that the financial
institution/parent would not seek to disclaim financial responsibility for these obligations if the sponsor/subsidiary is unable to honor its contractual obligations or pay a judgement that we may obtain in litigation. Additionally, in the case of
successor institutions, we are not aware of any provisions that explicitly preclude or limit the successors obligations to honor the obligations of the original sponsor. As a result, we did not make any significant adjustments to our estimated
subrogation recoveries with respect to the credit risk of these sponsors or their successors. We believe that focusing our loan remediation efforts on large financial institutions first will provide the greatest economic benefit to Ambac. Ambac
retains the right to review all RMBS transactions for representations and warranties breaches. Since a significant number of other second-lien and first-lien transactions are also experiencing poor performance, management is considering expanding
the scope of this effort.

Below is the rollforward of RMBS subrogation for the period December 31, 2009 through
September 30, 2010:



|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|-------------------------------------------------------------- |  | ------------- | --------- |  | --------- |  | --- | ------------- |  | - | --------- | - |  |  | --- | 
|                                                               |  | Random sample |           |  | # ofdeals |  |     | AdverseSample |  |   | # ofdeals |  
|Rollforward:                                                   |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Discounted RMBS subrogation (gross of reinsurance) at 12/31/09 |  | $             | 1,586,171 |  |           |  | 9   |               |  | $ | 460,617   |   |  |  | 10  | 
|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Changes recognized in 2010:                                    |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Additional transactions reviewed                               |  |               | 126,184   |  |           |  | 3   |               |  |   | 193,860   |   |  |  | 5   | 
|Additional adverse sample loans reviewed                       |  |               |          |  |           |  | n/a |               |  |   | 59,461    |   |  |  | n/a | 
|Loans repurchased by the sponsor                               |  |               |          |  |           |  | n/a |               |  |   | (23,882   | ) |  |  | n/a | 
|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Subtotal of changes recognized in current period               |  |               | 126,184   |  |           |  | 3   |               |  |   | 229,439   |   |  |  | 5   | 
|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Changes from re-estimation of opening balance:                 |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Change in pre-recovery loss reserves                           |  |               | 425       |  |           |  | n/a |               |  |   | 19,813    |   |  |  | n/a | 
|Other                                                          |  |               |          |  |           |  | n/a |               |  |   | (1,351    | ) |  |  | n/a | 
|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Subtotal of changes from re-estimation of opening balance      |  |               | 425       |  |           |  |    |               |  |   | 18,462    |   |  |  |    | 
|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 
|Discounted RMBS subrogation (gross of reinsurance) at 9/30/10  |  | $             | 1,712,780 |  |           |  | 12  |               |  | $ | 708,518   |   |  |  | 15  | 
|                                                               |  |               |           |  |           |  |     |               |  |   |           |   |  |  |     | 

As a consequence of the Segregated Account Rehabilitation Proceedings, the rehabilitator retains operational
control and decision-making authority with respect to all matters related to the Segregated Account, including surveillance, remediation and loss mitigation. As noted in Item 1 Recent Developments, all RMBS policies were allocated
to the Segregated Account and as such, the foregoing discussion of Ambacs risk management practices is qualified by reference to the rehabilitators exercise of its discretion to alter or eliminate the above risk management practices
relating to representation and warranty breaches by RMBS transaction sponsors.



39



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Our ability to
recover the RMBS subrogation recoveries is subject to significant uncertainty, including risks inherent in litigation, collectability of such amounts from counterparties (and/or their respective parents and affiliates), timing of receipt of any such
recoveries, regulatory intervention which could impede our ability to take actions required to realize such recoveries and uncertainty inherent in the assumptions used in estimating such recoveries. Our current estimate considers that we will
receive subrogation recoveries of $903,846 and $1,599,523 in 2011 and 2013, respectively. The amount of these subrogation recoveries is significant and if were unable to recover any amounts our future available liquidity to pay claims would be
reduced and our stockholders deficit as of September 30, 2010 would increase from $1,217,580 to $3,613,036.

The
following table summarizes the changes in the total net loss reserves for the nine months ended September 30, 2010:



|                                                                                            |  |                                     |           |  
|------------------------------------------------------------------------------------------- |  | ----------------------------------- | --------- | -
|($ in millions)                                                                             |  | Nine Months EndedSeptember 30, 2010 |          
|Loss reserves at December 31, 2009, net of subrogation recoverable and reinsurance          |  | $                                   | 3,777,321 |  
|Impact of adopting ASU 2009-17(1)                                                           |  |                                     | (503,887  | )
|                                                                                            |  |                                     |           |  
|Beginning balance of net loss reserves, net of subrogation recoverable and reinsurance      |  |                                     | 3,273,434 |  
|                                                                                            | 
|Changes in the loss reserves due to:                                                        |  |                                     |           |  
|Current year:                                                                               |  |                                     |           |  
|Establishment of new loss reserves, gross of subrogation and net of reinsurance             |  |                                     | 335,562   |  
|Claim payments, net of subrogation and reinsurance                                          |  |                                     | 7,790     |  
|Establishment of subrogation recoveries, net of reinsurance                                 |  |                                     | (315,814  | )
|                                                                                            |  |                                     |           |  
|Total current year                                                                          |  |                                     | 27,538    |  
|Prior year:                                                                                 |  |                                     |           |  
|Change in previously established loss reserves, gross of subrogation and net of reinsurance |  |                                     | 614,747   |  
|Change in previously established subrogation recoveries, net of reinsurance                 |  |                                     | (53,380   | )
|Claim payments, net of subrogation recoverable and reinsurance                              |  |                                     | (262,899  | )
|                                                                                            |  |                                     |           |  
|Total prior year                                                                            |  |                                     | 298,468   |  
|Changes in loss reserves                                                                    |  |                                     | 326,006   |  
|Deconsolidation of certain VIEs(1)                                                          |  |                                     | 546,690   |  
|                                                                                            |  |                                     |           |  
|Ending loss reserves, net of subrogation recoverable and reinsurance                        |  | $                                   | 4,146,130 |  
|                                                                                            |  |                                     |           |  



|(1) | Refer to Note 3 of this Unaudited Consolidated Financial Statements for discussion of ASU 2009-17.
|--- | --------------------------------------------------------------------------------------------------

(6) Derivative Contracts

ASC Topic 815, Derivatives and Hedging, establishes accounting and reporting standards for derivative instruments. All derivatives,
whether designated for hedging relationships or not, are required to be recorded on the Consolidated Balance Sheets at fair value. Methodologies used to determine fair value of derivative contracts, including model inputs and assumptions where
applicable, are described further in Note 11, Fair Value Measurements. ASC Topic 815 requires qualitative disclosures about objectives and strategies for using derivatives, quantitative disclosures about fair value amounts of gains and losses on
derivative instruments, and disclosures about credit-risk-related contingent features in derivative agreements. These disclosures have been included in the discussion below.

The Company entered into derivative contracts both for trading purposes and to hedge certain economic risks inherent in its financial asset and liability portfolios. Derivatives for trading include credit
derivatives issued as a form of financial guarantee, certain interest rate and currency swaps and futures



40



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



contracts. Credit derivatives had also been purchased to mitigate portions of the risks assumed under written credit derivative contracts. All purchased credit derivatives have been settled prior
to September 30, 2010. See Derivative Contracts Classified as Held for Trading Purposes below for further discussion of these products. Interest rate and currency swaps are also used to manage the risk of changes in fair
value or cash flows caused by variations in interest rates and foreign currency exchange rates. Certain of these transactions had been designated as fair value hedges or cash flow hedges under ASC Topic 815. See Derivative Contracts used
for Non-Trading and Hedging Purposes below for further discussion of derivatives used for risk management purposes.

Upon the adoption of ASU 2009-17 at January 1, 2010, Ambac was required to recognize the derivative assets and liabilities of the
VIEs at fair value. Refer to Notes 3 and 11 for further information related to the VIE consolidation and fair value measurements, respectively.

All derivative contracts are recorded on the Consolidated Balance Sheets at fair value on a gross basis; assets and liabilities are netted by customer only when a legal right of offset exists. Ambac
elects to not offset fair value amounts recognized for the right to reclaim cash collateral or futures margin or the obligation to return cash collateral against fair value amounts recognized for derivative instruments executed with the same
counterparty under the same master netting arrangement. The amounts representing the right to reclaim cash collateral and posted margin, recorded in Other assets were $106,806 and $119,456 as of September 30, 2010 and
December 31, 2009, respectively. The amounts representing the obligation to return cash collateral, recorded in Other liabilities were $9,440 and $90,009 as of September 30, 2010 and December 31, 2009, respectively. The
following tables summarize the location and fair values of individual derivative instruments reported in the Consolidated Balance Sheets as of September 30, 2010 and December 31, 2009. Amounts are presented gross of the effect of
offsetting balances even where a legal right of offset exists:



41



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|--------------------------------------------------------------------------------------- |  | ---------------------- | ---------------------- |  | -------------------- | - | ------- | ---------------------- |  |  | ---------------------- |  |  | - | --------- | 
|Fair Values of Derivative Instruments                                                   | 
|                                                                                        |  |                       
|                                                                                        |  | Derivative Asset       |                        |  | Derivative Liability |  
|                                                                                        |  | Balance Sheet Location |                        |  | Fair Value           |   |         | Balance Sheet Location |  |  | Fair value             | 
|September 30, 2010:                                                                     |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Derivatives held for trading                                                            |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Credit derivatives                                                                      |  |                        | Derivative assets      |  |                      | $ |        |                        |  |  | Derivative liabilities |  |  | $ | 232,528   | 
|Interest rate swaps                                                                     |  |                        | Derivative assets      |  |                      |   | 455,429 |                        |  |  | Derivative liabilities |  |  |   | 245,046   | 
|                                                                                        |  |                        | Derivative liabilities |  |                      |   | 2,144   |                        |  |  | Derivative assets      |  |  |   | 156,672   | 
|Currency swaps                                                                          |  |                        | Derivative assets      |  |                      |   |        |                        |  |  | Derivative liabilities |  |  |   | 7,842     | 
|                                                                                        |  |                        | Derivative liabilities |  |                      |   |        |                        |  |  | Derivative assets      |  |  |   |          | 
|Futures contracts                                                                       |  |                        | Derivative assets      |  |                      |   |        |                        |  |  | Derivative liabilities |  |  |   | 3,317     | 
|Other contracts                                                                         |  |                        | Derivative assets      |  |                      |   |        |                        |  |  | Derivative liabilities |  |  |   | 289       | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Total derivatives held for trading                                                      |  |                        |                        |  |                      |   | 457,573 |                        |  |  |                        |  |  |   | 645,694   | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Total derivatives                                                                       |  |                        |                        |  |                      | $ | 457,573 |                        |  |  |                        |  |  | $ | 645,694   | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Variable Interest Entities                                                              |  |                        | Derivative assets      |  |                      | $ | 4,362   |                        |  |  | Derivative liabilities |  |  | $ | 1,581,681 | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|                                                                                        |  |                        |                        | 
|December 31, 2009:                                                                      |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Derivatives held for trading                                                            |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Credit derivatives                                                                      |  |                        | Derivative assets      |  |                      | $ | 212,402 |                        |  |  | Derivative liabilities |  |  | $ | 3,251,893 | 
|Interest rate swaps                                                                     |  |                        | Derivative assets      |  |                      |   | 217,855 |                        |  |  | Derivative liabilities |  |  |   | 320,766   | 
|                                                                                        |  |                        | Derivative liabilities |  |                      |   | 121,914 |                        |  |  | Derivative assets      |  |  |   | 14,013    | 
|Currency swaps                                                                          |  |                        | Derivative assets      |  |                      |   | 76,347  |                        |  |  | Derivative liabilities |  |  |   | 85,396    | 
|                                                                                        |  |                        | Derivative liabilities |  |                      |   |        |                        |  |  | Derivative assets      |  |  |   | 18,574    | 
|Futures contracts                                                                       |  |                        | Derivative assets      |  |                      |   | 10,125  |                        |  |  | Derivative liabilities |  |  |   |          | 
|Other contracts                                                                         |  |                        | Derivative assets      |  |                      |   |        |                        |  |  | Derivative liabilities |  |  |   | 717       | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Total derivatives held for trading                                                      |  |                        |                        |  |                      |   | 638,643 |                        |  |  |                        |  |  |   | 3,691,359 | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Non-trading derivatives not designated as hedging instruments under ASC Topic 815       |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Interest rate swaps                                                                     |  |                        | Derivative assets      |  |                      |   | 12,352  |                        |  |  | Derivative liabilities |  |  |   |          | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Total non-trading derivatives not designated as hedging instruments under ASC Topic 815 |  |                        |                        |  |                      |   | 12,352  |                        |  |  |                        |  |  |   |          | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Total derivatives                                                                       |  |                        |                        |  |                      | $ | 650,995 |                        |  |  |                        |  |  | $ | 3,691,359 | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 
|Variable Interest Entities                                                              |  |                        | Derivative assets      |  |                      | $ | 109,411 |                        |  |  | Derivative liabilities |  |  | $ |          | 
|                                                                                        |  |                        |                        |  |                      |   |         |                        |  |  |                        |  |  |   |           | 

Derivative Contracts Classified as Held for Trading Purposes:

Financial Guarantee Credit Derivatives:

Until the third quarter of 2007, Ambacs subsidiary, Ambac Credit Products (ACP) sold credit protection by entering into credit derivatives, primarily in the form of credit default swap
contracts (CDS contracts), with various financial institutions. In a limited number of contracts, the Company purchased credit protection on a portion of the risk written from reinsurance companies or other financial companies, all of
which have been settled prior to September 30, 2010. Credit derivative assets included in the Consolidated Balance Sheets as of December 31, 2009 arose from such purchased credit default swaps. There were no purchased credit derivative
transactions remaining in the portfolio as of September 30, 2010.

These credit derivatives, which are privately
negotiated contracts, provide the counterparty with credit protection against the occurrence of a specific event such as a payment default or bankruptcy relating to an underlying obligation. Upon a credit event, ACP is generally required to make
payments equal to the difference between the scheduled debt service payment and the actual payment made by the issuer. The majority of our credit derivatives are written on a pay-as-you-go basis. Similar to an insurance policy execution,
pay-as-you-go provides that Ambac pays interest shortfalls on the referenced transaction as they are incurred on each scheduled payment date, but only pays principal shortfalls upon the earlier of (i) the date on which the assets designated to
fund the referenced obligation have been disposed of and (ii) the legal final maturity date of the referenced obligation.



42



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





In a small number
of transactions, ACP is required to (i) make a payment equal to the difference between the par value and market value of the underlying obligation or (ii) purchase the underlying obligation at its par value and a loss is realized for the
difference between the par and market value of the underlying obligation. There are 21 transactions, which are not pay-as-you-go, with a combined notional of approximately $1,777,834 and a net liability fair value of $9,173 as of
September 30, 2010. All except one deal carry an internal rating of A or better. These transactions are primarily in the form of CLOs written between 2002 and 2005.

Substantially all of ACPs credit derivative contracts relate to structured finance transactions. Credit derivatives issued by ACP
are insured by Ambac Assurance. None of our outstanding credit derivative transactions at September 30, 2010 include ratings based collateral-posting triggers or otherwise require Ambac to post collateral regardless of Ambacs ratings or
the size of the mark to market exposure to Ambac.

Ambac maintains internal credit ratings on its guaranteed obligations,
including credit derivative contracts, solely to indicate managements view of the underlying credit quality of the guaranteed obligations. Independent rating agencies may have assigned different ratings on the credits in Ambacs portfolio
than Ambacs internal ratings. Ambacs BBB internal rating reflects bonds which are of medium grade credit quality with adequate capacity to pay interest and repay principal. Certain protective elements and margins may weaken under adverse
economic conditions and changing circumstances. These bonds are more likely than higher rated bonds to exhibit unreliable protection levels over all cycles. Ambacs below investment grade (BIG) internal ratings reflect bonds which
are of speculative grade credit quality with the adequacy of future margin levels for payment of interest and repayment of principal potentially adversely affected by major ongoing uncertainties or exposure to adverse conditions.

The following table summarizes the net par outstanding for CDS contracts, by Ambac rating, for each major category as of
September 30, 2010:



|                       |  |     |            |  |          |   |           |       |  |   |            | 
|---------------------- |  | --- | ---------- |  | -------- | - | --------- | ----- |  | - | ---------- | 
|Ambac Rating           |  | CLO |            |  | Other(1) |   |           | Total | 
|AAA                    |  | $   | 447,840    |  |          | $ | 3,156,934 |       |  | $ | 3,604,774  | 
|AA                     |  |     | 8,953,933  |  |          |   | 1,182,635 |       |  |   | 10,136,568 | 
|A                      |  |     | 2,804,310  |  |          |   | 2,928,219 |       |  |   | 5,732,529  | 
|BBB                    |  |     | 40,332     |  |          |   | 594,477   |       |  |   | 634,809    | 
|Below investment grade |  |     |           |  |          |   | 263,961   |       |  |   | 263,961    | 
|                       |  |     |            |  |          |   |           |       |  |   |            | 
|                       |  | $   | 12,246,415 |  |          | $ | 8,126,226 |       |  | $ | 20,372,641 | 
|                       |  |     |            |  |          |   |           |       |  |   |            | 



|(1) | Other CDS contracts include primarily Market Value CDOs, CDO of ABS containing less than 25% MBS and various other asset classes.
|--- | ---------------------------------------------------------------------------------------------------------------------------------



43



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The tables below
summarize information by major category as of September 30, 2010 and December 31, 2009:

September 30,
2010



|                                                                   |  |     |            |   |       |   |           |       |  |   |            |  
|------------------------------------------------------------------ |  | --- | ---------- | - | ----- | - | --------- | ----- |  | - | ---------- | -
|                                                                   |  | CLO |            |   | Other |   |           | Total | 
|Number of CDS transactions                                         |  |     | 60         |   |       |   | 32        |       |  |   | 92         |  
|Remaining expected weighted-average life of obligations (in years) |  |     | 3.5        |   |       |   | 4.2       |       |  |   | 3.8        |  
|Gross principal notional outstanding                               |  | $   | 12,246,415 |   |       | $ | 8,126,226 |       |  | $ | 20,372,641 |  
|Gross and net derivative liabilities at fair value                 |  | $   | (81,110    | ) |       | $ | (151,418  | )     |  | $ | (232,528   | )

December 31,
2009



|                                                                   |  |            |            |   |     |   |            |       |  |   |           |   |  |   |            |  
|------------------------------------------------------------------ |  | ---------- | ---------- | - | --- | - | ---------- | ----- |  | - | --------- | - |  | - | ---------- | -
|                                                                   |  | CDO of ABS |            |   | CLO |   |            | Other |  |   | Total     |  
|Number of CDS transactions                                         |  |            | 19         |   |     |   | 76         |       |  |   | 37        |   |  |   | 132        |  
|Remaining expected weighted-average life of obligations (in years) |  |            | 25.3       |   |     |   | 4.2        |       |  |   | 4.8       |   |  |   | 12.5       |  
|Gross principal notional outstanding                               |  | $          | 17,052,686 |   |     | $ | 17,774,666 |       |  | $ | 8,783,969 |   |  | $ | 43,611,321 |  
|Hedge principal notional outstanding                               |  | $          | 335,000    |   |     | $ |           |       |  | $ |          |   |  | $ | 335,000    |  
|Net derivative liabilities at fair value                           |  | $          | (2,253,341 | ) |     | $ | (381,707   | )     |  | $ | (404,443  | ) |  | $ | (3,039,491 | )

The maximum potential
amount of future payments under Ambacs credit derivative contracts written on a pay-as-you-go basis is generally the gross principal notional outstanding amount included in the above table plus future interest payments payable by
the derivative reference obligations. For contracts that are not written with pay-as-you-go terms, the maximum potential future payment is represented by the principal notional only. Since Ambacs credit derivatives typically reference
obligations of or assets held by SPEs that meet the definition of a VIE, the amount of maximum potential future payments for credit derivatives is included in the table in Note 3, Application of the New Consolidation Accounting Standard on Special
Purpose Entities, including Variable Interest Entities.

Amounts paid under our written credit derivative contracts may be
recoverable as a result of future payments of previously missed principal or interest payments by the reference obligation payor or purchased credit derivatives that hedge Ambacs gross exposure to a written contract or future recoveries from
reference obligation collateral acquired in connection with credit derivative settlements. Such collateral typically comprises securities and/or loans owned or referenced in the securitization structure on which Ambac provided senior credit
protection. The fair value of purchased credit derivatives included in net fair value of credit derivatives was $0 and $212,402 at September 30, 2010 and December 31, 2009, respectively. In August 2010, Ambac Assurance settled all of its
remaining hedge contracts on certain of the companys written credit derivative exposures that were commuted under the Settlement Agreement as further described in Note 1.

Ambacs credit derivative contracts are accounted for at fair value since they do not qualify for the financial guarantee scope
exception under ASC Topic 815. Changes in fair value are recorded in Net change in fair value of credit derivatives on the Consolidated Statements of Operations. The Realized gains and losses and other settlements component
of this income statement line includes (i) premiums received and accrued on written credit derivative contracts, (ii) premiums paid and accrued on purchased credit derivative contracts, (iii) losses paid and payable on written credit
derivative contracts and (iv) paid losses recovered and recoverable on purchased credit derivative contracts for the appropriate accounting period. Losses paid and payable and losses recovered and recoverable reported in Realized gains
and losses and other settlements include those arising after a credit event that requires a payment under the



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



contract terms has occurred or in connection with a negotiated termination of a contract. Paid losses included in realized gains and losses and other settlements were $0 and $2,994,532 for the
three and nine months ended September 30, 2010, respectively, and $745,672 and $769,456 for the three and nine months ended September 30, 2009, respectively. The Unrealized gains (losses) component of this income statement line
includes all other changes in fair value, including reductions in the fair value of liabilities as they are paid or settled. Refer to Note 11 for a detailed description of the components of our credit derivative contracts fair value.

Although CDS contracts are accounted for at fair value in accordance with ASC Topic 815, they are surveilled similar to
non-derivative financial guarantee contracts. As with financial guarantee insurance policies, Ambacs surveillance group tracks credit migration of CDS contracts reference obligations from period to period. Adversely classified credits
are assigned risk classifications by the surveillance group using the guidelines described in Note 5. As a result of the Settlement Agreement described in Note 1, there are no CDS contracts on Ambacs adversely classified credit listing as of
September 30, 2010.

Financial Services Derivative Products:

Ambac, through its subsidiary Ambac Financial Services, provided interest rate and currency swaps to states, municipalities and their
authorities, asset-backed issuers and other entities in connection with their financings. The interest rate swaps provided typically require Ambac Financial Services to receive a fixed rate and pay either a tax-exempt index rate or an issue-specific
bond rate on a variable-rate bond. Ambac Financial Services manages its interest rate swaps business with the goal of being market neutral to changes in benchmark interest rates while retaining some basis risk and some excess interest rate
sensitivity as an economic hedge against the effects of rising interest rates on Ambacs financial guarantee exposures. Within the trading derivatives portfolio, Ambac Financial Services enters into interest rate and currency swaps with
professional counterparties and uses exchange traded U.S. Treasury futures with the objective of managing overall exposure to benchmark interest rates and currency risk exposure. Basis risk in the portfolio arises primarily from (i) variability
in the ratio of benchmark tax-exempt to taxable interest rates, (ii) potential changes in the counterparty bond issuers bond-specific variable rates relative to taxable interest rates, and (iii) variability between Treasury and swap
rates. The derivative portfolio also includes an unhedged Sterling-denominated exposure to Consumer Price Inflation in the United Kingdom. Ambac has economically hedged the risk of interest rate increases through Ambac Financial Services
trading derivatives portfolio to mitigate floating rate obligations elsewhere in the Company, including in the credit derivative portfolio.

The notional amounts of Ambac Financial Services trading derivative products at September 30, 2010 and December 31, 2009 are as follows:



|                                               |  |                               |           |  |                              |   |           | 
|---------------------------------------------- |  | ----------------------------- | --------- |  | ---------------------------- | - | --------- | 
|Type of derivative                             |  | Notional atSeptember 30, 2010 |           |  | Notional atDecember 31, 2009 |  
|Interest rate swapsreceive-fixed/pay-variable |  | $                             | 1,676,142 |  |                              | $ | 2,040,984 | 
|Interest rate swapspay-fixed/receive-variable |  |                               | 3,497,174 |  |                              |   | 2,862,866 | 
|Interest rate swapsbasis swaps                |  |                               | 231,250   |  |                              |   | 641,370   | 
|Currency swaps                                 |  |                               | 41,731    |  |                              |   | 1,165,213 | 
|Futures contracts                              |  |                               | 290,000   |  |                              |   | 394,200   | 
|Other contracts                                |  |                               | 154,260   |  |                              |   | 241,641   | 

Ambac, through its
subsidiary Ambac Capital Services, entered into total return swap contracts with professional counterparties. These contracts required Ambac Capital Services to pay a specified spread in excess of LIBOR in exchange for receiving the total return of
an underlying fixed income



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



obligation over a specified period of time. The referenced fixed income obligations met Ambac Assurances financial guarantee credit underwriting criteria at the time of the transactions. In
2009, all remaining total return swaps were terminated and settled.

The following table summarizes the location and amount of
gains and losses of derivative contracts held for trading purposes in the Consolidated Statements of Operations for the three and nine months ended September 30, 2010:



|                                                     |  |                                                                             |  |                                                                                                               |         |   |                                                                                                              |   |          |  
|---------------------------------------------------- |  | --------------------------------------------------------------------------- |  | ------------------------------------------------------------------------------------------------------------- | ------- | - | ------------------------------------------------------------------------------------------------------------ | - | -------- | -
|                                                     |  | Location of Gain or (Loss)Recognized in ConsolidatedStatement of Operations |  | Amount of Gain or(Loss) Recognizedin ConsolidatedStatement
ofOperations  Threemonths endedSeptember 30, 2010 |         |   | Amount of Gain or(Loss) Recognizedin ConsolidatedStatement
ofOperations  Ninemonths endedSeptember 30, 2010 |  
|Financial Guarantee:                                 |  |                                                                             |  |                                                                                                               |         |   |                                                                                                              |   |          |  
|Credit derivatives                                   |  | Net change in fair value of credit derivatives                              |  | $                                                                                                             | 9,412   |   |                                                                                                              | $ | 44,454   |  
|Financial Services derivatives products:             |  |                                                                             |  |                                                                                                               |         |   |                                                                                                              |   |          |  
|Interest rate swaps                                  |  | Derivative products                                                         |  |                                                                                                               | (66,047 | ) |                                                                                                              |   | (81,754  | )
|Currency swaps                                       |  | Derivative products                                                         |  |                                                                                                               | (464    | ) |                                                                                                              |   | (70,702  | )
|Futures contracts                                    |  | Derivative products                                                         |  |                                                                                                               | (12,614 | ) |                                                                                                              |   | (56,038  | )
|Other derivatives                                    |  | Derivative products                                                         |  |                                                                                                               | 581     |   |                                                                                                              |   | 683      |  
|                                                     |  |                                                                             |  |                                                                                                               |         |   |                                                                                                              |   |          |  
|Total Financial Services derivative products         |  |                                                                             |  |                                                                                                               | (78,544 | ) |                                                                                                              |   | (207,811 | )
|                                                     |  |                                                                             |  |                                                                                                               |         |   |                                                                                                              |   |          |  
|Total derivative contracts held for trading purposes |  |                                                                             |  | $                                                                                                             | (69,132 | ) |                                                                                                              | $ | (163,357 | )
|                                                     |  |                                                                             |  |                                                                                                               |         |   |                                                                                                              |   |          |  

The following table summarizes the location and amount of gains and losses of derivative contracts held for
trading purposes in the Consolidated Statements of Operations for the three and nine months ended September 30, 2009:



|                                                     |  |                                                                              |  |                                                                                                               |           |   |                                                                                                              |   |           |  
|---------------------------------------------------- |  | ---------------------------------------------------------------------------- |  | ------------------------------------------------------------------------------------------------------------- | --------- | - | ------------------------------------------------------------------------------------------------------------ | - | --------- | -
|                                                     |  | Location of Gain or (Loss)Recognized in Consolidated
Statement of Operations |  | Amount of Gain or(Loss) Recognizedin ConsolidatedStatement ofOperations
 Threemonths endedSeptember 30, 2009 |           |   | Amount of Gain or(Loss) Recognizedin ConsolidatedStatement ofOperations 
Ninemonths endedSeptember 30, 2009 |  
|Financial Guarantee:                                 |  |                                                                              |  |                                                                                                               |           |   |                                                                                                              |   |           |  
|Credit derivatives                                   |  | Net change in fair value of credit derivatives                               |  | $                                                                                                             | 2,132,904 |   |                                                                                                              | $ | 3,679,717 |  
|Financial Services derivatives products:             |  |                                                                              |  |                                                                                                               |           |   |                                                                                                              |   |           |  
|Interest rate swaps                                  |  | Derivative products                                                          |  |                                                                                                               | (188,817  | ) |                                                                                                              |   | (251,887  | )
|Currency swaps                                       |  | Derivative products                                                          |  |                                                                                                               | (8,294    | ) |                                                                                                              |   | (13,132   | )
|Total return swaps                                   |  | Net change in fair value of total return swap contracts                      |  |                                                                                                               | 6,902     |   |                                                                                                              |   | 18,573    |  
|Futures contracts                                    |  | Derivative products                                                          |  |                                                                                                               | (25,635   | ) |                                                                                                              |   | (17,175   | )
|Other derivatives                                    |  | Derivative products                                                          |  |                                                                                                               | 274       |   |                                                                                                              |   | 953       |  
|                                                     |  |                                                                              |  |                                                                                                               |           |   |                                                                                                              |   |           |  
|Total Financial Services derivative products         |  |                                                                              |  |                                                                                                               | (215,570  | ) |                                                                                                              |   | (262,668  | )
|                                                     |  |                                                                              |  |                                                                                                               |           |   |                                                                                                              |   |           |  
|Total derivative contracts held for trading purposes |  |                                                                              |  | $                                                                                                             | 1,917,334 |   |                                                                                                              | $ | 3,417,049 |  
|                                                     |  |                                                                              |  |                                                                                                               |           |   |                                                                                                              |   |           |  

Derivative Contracts used for Non-Trading and Hedging Purposes:

Interest rate and currency swaps are used to manage the risk of changes in fair value or cash flows caused by variations in interest rates
and foreign currency exchange rates. These risks exist within the investment agreement business primarily related to differences in coupon interest terms between investment agreement contracts and invested assets that support those contracts. In
order to qualify for hedge accounting, a derivative must be considered highly effective at reducing the risk associated with the exposure being hedged. Each derivative must be designated as a hedge, with documentation of the risk



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



management objective and strategy, including identification of the hedging instrument, the hedged item, the risk exposure, and how effectiveness will be assessed prospectively and
retrospectively. The extent to which a hedging instrument is effective at achieving offsetting changes in fair values or cash flows must be assessed at least quarterly. Any ineffectiveness must be reported in net income. Derivatives may be used for
non-trading and hedging purposes, even if they do not meet the technical requirements for hedge accounting under ASC Topic 815. The number of designated hedges under ASC Topic 815 has been declining with the runoff of the investment agreement
portfolio and, as of December 31, 2009, no accounting hedges remain in the companys portfolio. In the second quarter 2010, all remaining derivatives of the investment agreement business were terminated.

The notional amounts of Ambacs derivative contracts used for non-trading and hedging purposes at September 30, 2010 and
December 31, 2009 are as follows:



|                                                                                     |  |                               |   |  |                              |   |         | 
|------------------------------------------------------------------------------------ |  | ----------------------------- | - |  | ---------------------------- | - | ------- | 
|                                                                                     |  | Notional
atSeptember 30, 2010 |   |  | Notional atDecember 31, 2009 |  
|Derivatives not designated or qualifying as hedging instruments under ASC Topic 815: |  |                               |   |  |                              |  
|Interest rate swaps                                                                  |  | $                             |  |  |                              | $ | 150,982 | 

Interest rate and
currency swaps are utilized to hedge exposure to changes in fair value of assets or liabilities resulting from changes in interest rates and foreign exchange rates, respectively. These interest rate and currency swap hedges are referred to as
fair value hedges. If the provisions of the derivative contract meet the technical requirements for fair value hedge accounting under ASC Topic 815, the change in fair value of the derivative contract, excluding accrued interest, is
recorded as a component of Net mark-to-market (losses) gains on non-trading derivative contracts in the Consolidated Statements of Operations. The change in fair value of the hedged asset or liability attributable to the hedged risk
adjusts the carrying amount of the hedged item and is recorded as a component of Net mark-to-market (losses) gains on non-trading derivative contracts. Changes in the accrued interest component of the derivative contract are recorded as
an offset to changes in the accrued interest component of the hedged item. As noted above, all designated hedge relationships under ASC Topic 815 were terminated by December 31, 2009. There were no designated accounting hedges in 2010.



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
table summarizes the location and amount of gains and losses of fair value hedges designated under ASC Topic 815 and related hedge item reported in the Consolidated Statements of Operations for the three and nine months ended September 30,
2009:

Three months ended September 30, 2009:



|                                                             |  |                                                                               |  |                                                 |         |   |                                                 |   |        |                                                                                       |  |   |        |  
|------------------------------------------------------------ |  | ----------------------------------------------------------------------------- |  | ----------------------------------------------- | ------- | - | ----------------------------------------------- | - | ------ | ------------------------------------------------------------------------------------- |  | - | ------ | -
|Derivatives in ASC Topic 815 Fair ValueHedging
Relationships |  | Location of Gain or (Loss)
Recognized in
Consolidated Statement of Operations |  | Amount of Gainor
(Loss)Recognized onDerivatives |         |   | Amount of Gainor
(Loss)Recognized onHedged Item |   |        | Net Gain or (Loss)Recognized
inIncome Related
toHedge Terminationsand Ineffectiveness | 
|Interest rate swaps                                          |  | Net mark-to-market gains (losses) on non-trading derivative contracts         |  | $                                               | (1,280  | ) |                                                 | $ | 1,062  |                                                                                       |  | $ | (218   | )
|                                                             |  | Financial Services: Interest from investment and payment agreements           |  |                                                 | 1,423   |   |                                                 |   | (2,849 | )                                                                                     |  |   | (1,426 | )
|Currency swaps                                               |  | Net mark-to-market gains (losses) on non-trading derivative contracts         |  |                                                 |        |   |                                                 |   |       |                                                                                       |  |   |       |  
|                                                             |  | Financial Services: Interest from investment and payment agreements           |  |                                                 |        |   |                                                 |   |       |                                                                                       |  |   |       |  
|                                                             |  |                                                                               |  |                                                 |         |   |                                                 |   |        |                                                                                       |  |   |        |  
|Total                                                        |  |                                                                               |  | $                                               | 143     |   |                                                 | $ | (1,787 | )                                                                                     |  | $ | (1,644 | )
|                                                             |  |                                                                               |  |                                                 |         |   |                                                 |   |        |                                                                                       |  |   |        |  
|                                                            
|Nine months ended September 30, 2009:                        | 
|                                                             |  |                                                                               |  |                                                
|Interest rate swaps                                          |  | Net mark-to-market gains (losses) on non-trading derivative contracts         |  | $                                               | (65,375 | ) |                                                 | $ | 66,011 |                                                                                       |  | $ | 636    |  
|                                                             |  | Financial Services: Interest from investment and payment agreements           |  |                                                 | 6,691   |   |                                                 |   | (8,403 | )                                                                                     |  |   | (1,712 | )
|Currency swaps                                               |  | Net mark-to-market gains (losses) on non-trading derivative contracts         |  |                                                 | (94     | ) |                                                 |   | 92     |                                                                                       |  |   | (2     | )
|                                                             |  | Financial Services: Interest from investment and payment agreements           |  |                                                 | 35      |   |                                                 |   | (54    | )                                                                                     |  |   | (19    | )
|                                                             |  |                                                                               |  |                                                 |         |   |                                                 |   |        |                                                                                       |  |   |        |  
|Total                                                        |  |                                                                               |  | $                                               | (58,743 | ) |                                                 | $ | 57,646 |                                                                                       |  | $ | (1,097 | )
|                                                             |  |                                                                               |  |                                                 |         |   |                                                 |   |        |                                                                                       |  |   |        |  

Interest rate swaps are also utilized to hedge the exposure to changes in cash flows caused by variable
interest rates of assets or liabilities. These interest rate swap hedges are referred to as cash flow hedges. The effective portion of the gains and losses on interest rate swaps that meet the technical requirements for cash flow hedge
accounting under ASC Topic 815 is reported in Accumulated Other Comprehensive Loss in Stockholders Deficit. If the cumulative change in fair value of the derivative contract exceeds the cumulative change in fair value of the hedged
item, ineffectiveness is required to be recorded in net income. All designated hedge relationships under ASC Topic 815 were terminated by December 31, 2009. There were no designated accounting hedges in 2010. In the first quarter of 2010, all
remaining deferred gains on derivative instruments previously reported in Accumulated Other Comprehensive Loss have been reclassified to net income resulting in a gain of $1,156, included in Net mark-to-market gains (losses) on non-trading
derivative contracts for the nine months ended September 30, 2010.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
table summarizes the location and amount of gains and losses of cash flow hedges reported in the Consolidated Statements of Operations for the three and nine month periods ended September 30, 2009:

Three months ended September 30, 2009:



|                                                           |  |                                                                        |      |   |                                                                                |                                       |                                                                          |   |     |                                                                       |  |                                                                       |  |   |    | 
|---------------------------------------------------------- |  | ---------------------------------------------------------------------- | ---- | - | ------------------------------------------------------------------------------ | ------------------------------------- | ------------------------------------------------------------------------ | - | --- | --------------------------------------------------------------------- |  | --------------------------------------------------------------------- |  | - | -- | 
|Derivatives in ASC Topic 815 Cash
Flow Hedge Relationships |  | Amount of Gain(Loss)
Recognizedin OCI onDerivatives(Effective
Portion) |      |   | Location of Gain
(Loss) Reclassified from AOCI into Income (Effective
Portion) |                                       | Amount of Gain(Loss)
Reclassifiedfrom AOCI intoIncome
(EffectivePortion) |   |     | Location of Gain or
(Loss) Recognized in Income (Ineffective Portion) |  | Amount of
Gain(Loss) Recognized inIncome (IneffectivePortion)         | 
|Interest rate swaps                                        |  | $                                                                      | (370 | ) |                                                                                | Financial Services: Investment income |                                                                          | $ | 481 |                                                                       |  | Net mark-to-market gains (losses) on non-trading derivative contracts |  | $ | 19 | 

Nine months ended
September 30, 2009:



|                                                           |  |                                                                        |        |   |                                                                                |                                       |                                                                          |   |       |                                                                       |  |                                                                       |  |   |    | 
|---------------------------------------------------------- |  | ---------------------------------------------------------------------- | ------ | - | ------------------------------------------------------------------------------ | ------------------------------------- | ------------------------------------------------------------------------ | - | ----- | --------------------------------------------------------------------- |  | --------------------------------------------------------------------- |  | - | -- | 
|Derivatives in ASC Topic 815 Cash
Flow Hedge Relationships |  | Amount of Gain(Loss)
Recognizedin OCI onDerivatives(Effective
Portion) |        |   | Location of Gain
(Loss) Reclassified from AOCI into Income (Effective
Portion) |                                       | Amount of Gain(Loss)
Reclassifiedfrom AOCI intoIncome
(EffectivePortion) |   |       | Location of Gain or
(Loss) Recognized in Income (Ineffective Portion) |  | Amount of
Gain(Loss) Recognized inIncome (IneffectivePortion)         | 
|Interest rate swaps                                        |  | $                                                                      | (1,427 | ) |                                                                                | Financial Services: Investment income |                                                                          | $ | 2,196 |                                                                       |  | Net mark-to-market gains (losses) on non-trading derivative contracts |  | $ | 75 | 

Ambac discontinues hedge
accounting prospectively when it is determined that the derivative is no longer effective in offsetting changes in the fair value or cash flows of the hedged item, the derivative or hedged item expires or is sold or the hedge relationship is
re-designated. When hedge accounting is discontinued because the derivative no longer qualifies as an effective fair value hedge, Ambac continues to carry the derivative on the balance sheet at its fair value. The adjustment of the carrying amount
of the hedged asset or liability is accounted for in the same manner as other components of the carrying amount of that asset or liability. The net derivative gain or loss related to a discontinued cash flow hedge (recognized during the period of
hedge effectiveness) will continue to be reported in Accumulated Other Comprehensive Loss and amortized into net income as a yield adjustment to the previously designated asset or liability. If the previously designated asset or
liability is sold or matures, the net derivative gain or loss related to a discontinued cash flow hedge reported in Accumulated Other Comprehensive Loss will be reclassified into net income immediately. All subsequent changes in fair
values of derivatives previously designated as cash flow hedges will be recognized in net income.

Ambacs operating
subsidiaries enter into non-trading derivative contracts for the purpose of economically hedging exposures to fair value or cash flow changes caused by fluctuations in interest rates and foreign currency rates. Such contracts include derivatives
that do not meet the technical requirements for hedging under ASC Topic 815. Net gains (losses) recognized on such contracts recognized as part of net mark-to-market gains (losses) on non-trading derivative contracts was $0 and ($15,451) for the
three and nine months ended September 30, 2010, respectively, and ($6,709) and $1 for the three and nine months ended September 30, 2009, respectively.

Variable interest entities consolidated under ASC Topic 2009-17 use derivative instruments to economically hedge expected cash flow differences from collateral assets and VIE notes. The net gains or
losses on VIE derivatives are included in earnings under Financial Guarantee: (Loss) Income on variable interest entities (refer to Note 3).



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Contingent
Features in Derivatives Related to Ambac Credit Risk:

Ambacs interest rate swaps and currency swaps with
professional swap-dealer counterparties and certain front-end counterparties are generally executed under standardized derivative documents including collateral support and master netting agreements. Under these agreements, Ambac could be required
to post collateral in the event net unrealized losses exceed predetermined threshold levels associated with the credit ratings assigned to Ambac Assurance by designated rating agencies. Additionally, credit rating downgrades below defined levels
generally provide counterparties the right to terminate the swap positions.

As of September 30, 2010, the aggregate fair
value of all derivative instruments with contingent features linked to Ambacs own credit risk that are in a net liability position after considering legal rights of offset was $155,158 related to which Ambac had posted assets as collateral
with a fair value of $282,214. All such ratings-based contingent features have been triggered as of September 30, 2010, requiring maximum collateral levels to be posted by Ambac and allowing counterparties to elect to terminate the contracts.
Assuming all contracts terminated on September 30, 2010, settlement of collateral balances and net derivative liabilities would result in a net receipt of cash and/or securities by Ambac. If counterparties elect to exercise their right to
terminate, the actual termination payment amounts will be determined in accordance with derivative contract terms, which may result in amounts that differ from market values as reported in Ambacs financial statements.

(7) Income Taxes

Ambac
files a consolidated Federal income tax return with its subsidiaries. Ambac and its subsidiaries also file separate or combined income tax returns in various states, local and foreign jurisdictions. The following are the major jurisdictions in which
Ambac and its affiliates operate and the earliest tax years subject to examination:



|               |  |          |      | 
|-------------- |  | -------- | ---- | 
|Jurisdiction   |  | Tax Year |     
|United States  |  |          | 2005 | 
|New York State |  |          | 2008 | 
|New York City  |  |          | 2000 | 
|United Kingdom |  |          | 2005 | 

As of
September 30, 2010 and December 31, 2009, the liability for unrecognized tax benefits is approximately $23,000 and $22,850, respectively. Included in these balances at September 30, 2010 and December 31, 2009 are $23,000 and
$22,850, respectively, of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

Ambac accrues
interest and penalties related to unrecognized tax benefits in the provision for income taxes. During the nine months ended September 30, 2010 and 2009, Ambac recognized interest of approximately $150 and $3,075, respectively. During the three
months ended September 30, 2010 and 2009, Ambac recognized interest of approximately $50 and $1,025, respectively. Ambac had approximately $15,170 and $15,020 for the payment of interest accrued at September 30, 2010 and December 31,
2009, respectively.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





As a result of the
development of additional losses and the related impact on the Companys cash flows, management believes it is more likely than not that the Company will not generate sufficient taxable income to recover the deferred tax operating asset. As of
September 30, 2010 a full valuation allowance of $2,586,833 has been established against the deferred tax asset. As of December 31, 2009, the company had a valuation allowance of $2,701,493.

(8) Investments

ASC
Topic 320, Investment  Debt and Equity Securitiesrequires that all debt instruments and certain equity instruments be classified in Ambacs Consolidated Balance Sheets according to their purpose and, depending on that
classification, be carried at either cost or fair market value. Ambacs investment portfolio is accounted for on a trade-date basis and consists primarily of investments in fixed income securities that are considered available-for-sale as
defined by ASC Topic 320. Available-for-sale securities are reported in the financial statements at fair value with unrealized gains and losses, net of deferred taxes, reflected in Accumulated Other Comprehensive Loss in Stockholders Deficit
and are computed using amortized cost as the basis. Fair value is based primarily on quotes obtained from independent market sources. When quotes are not available, valuation models are used to estimate fair value. These models include estimates,
made by management, which utilize current market information. The quotes received or valuation results from valuation models could differ materially from amounts that would actually be realized in the market. For purposes of computing amortized
cost, premiums and discounts are accounted for using the effective interest method over the remaining term of the securities. Premiums and discounts for bonds that do not have a large number of similar underlying loans to consider estimates of
future principal payments, typically corporate and municipal bonds, are amortized or accreted over the remaining term of the securities even if they are callable. Premiums and discounts on mortgage-backed and asset-backed securities are adjusted for
the effects of actual and anticipated prepayments on a retrospective basis. Certain short-term investments, such as money market funds, are carried at cost, which approximates fair value. Realized gains and losses on the sale of investments are
determined on the basis of specific identification.



51



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





VIE investments in
fixed income securities are carried at fair value under the fair value option in accordance with ASC Topic 825. For additional information about VIE investments, including fair value by asset-type, see Note 3. The amortized cost and estimated fair
value of investments, excluding VIE investments, at September 30, 2010 and December 31, 2009 were as follows:



|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|---------------------------------------------- |  | ------------- | --------- |  | -------------------- | - | ------- | --------------------- |  | - | ------------------- |  |  | --------------------------------------------- | --------- |  |  | - | ------ | 
|                                               |  | AmortizedCost |           |  | GrossUnrealizedGains |   |         | GrossUnrealizedLosses |  |   | EstimatedFair Value |  |  | Non-credit other-than-temporaryImpairments(1) |          
|September 30, 2010
Fixed income securities:    |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Municipal obligations                          |  | $             | 2,064,009 |  |                      | $ | 129,098 |                       |  | $ | 2,607               |  |  | $                                             | 2,190,500 |  |  | $ |       | 
|Corporate obligations                          |  |               | 893,210   |  |                      |   | 63,350  |                       |  |   | 24,812              |  |  |                                               | 931,748   |  |  |   |       | 
|Foreign obligations                            |  |               | 114,125   |  |                      |   | 6,951   |                       |  |   |                    |  |  |                                               | 121,076   |  |  |   |       | 
|U.S. government obligations                    |  |               | 165,291   |  |                      |   | 9,507   |                       |  |   |                    |  |  |                                               | 174,798   |  |  |   |       | 
|U.S. agency obligations                        |  |               | 82,000    |  |                      |   | 8,182   |                       |  |   | 2                   |  |  |                                               | 90,180    |  |  |   |       | 
|Residential mortgage-backed securities         |  |               | 1,236,339 |  |                      |   | 257,430 |                       |  |   | 46,023              |  |  |                                               | 1,447,746 |  |  |   | 2,012  | 
|Collateralized debt obligations                |  |               | 41,534    |  |                      |   | 29      |                       |  |   | 13,353              |  |  |                                               | 28,210    |  |  |   |       | 
|Other asset-backed securities                  |  |               | 1,002,567 |  |                      |   | 35,816  |                       |  |   | 54,621              |  |  |                                               | 983,762   |  |  |   |       | 
|Short-term                                     |  |               | 617,748   |  |                      |   |        |                       |  |   |                    |  |  |                                               | 617,748   |  |  |   |       | 
|Other                                          |  |               | 100       |  |                      |   |        |                       |  |   |                    |  |  |                                               | 100       |  |  |   |       | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|                                               |  |               | 6,216,923 |  |                      |   | 510,363 |                       |  |   | 141,418             |  |  |                                               | 6,585,868 |  |  |   | 2,012  | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Fixed income securities pledged as collateral: |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|U.S. government obligations                    |  |               | 181,403   |  |                      |   | 3,413   |                       |  |   |                    |  |  |                                               | 184,816   |  |  |   |       | 
|U.S. agency obligations                        |  |               |          |  |                      |   |        |                       |  |   |                    |  |  |                                               |          |  |  |   |       | 
|Residential mortgage-backed securities         |  |               | 9,050     |  |                      |   | 521     |                       |  |   |                    |  |  |                                               | 9,571     |  |  |   |       | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Total collateralized investments               |  |               | 190,453   |  |                      |   | 3,934   |                       |  |   |                    |  |  |                                               | 194,387   |  |  |   |       | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Total investments                              |  | $             | 6,407,376 |  |                      | $ | 514,297 |                       |  | $ | 141,418             |  |  | $                                             | 6,780,255 |  |  | $ | 2,012  | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|                                               |  |               |           |  |                     
|December 31, 2009
Fixed income securities:     |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Municipal obligations                          |  | $             | 3,103,761 |  |                      | $ | 117,095 |                       |  | $ | 15,376              |  |  | $                                             | 3,205,480 |  |  | $ |       | 
|Corporate obligations                          |  |               | 859,797   |  |                      |   | 19,003  |                       |  |   | 37,582              |  |  |                                               | 841,218   |  |  |   |       | 
|Foreign obligations                            |  |               | 158,498   |  |                      |   | 10,368  |                       |  |   | 1,215               |  |  |                                               | 167,651   |  |  |   |       | 
|U.S. government obligations                    |  |               | 230,587   |  |                      |   | 3,541   |                       |  |   | 712                 |  |  |                                               | 233,416   |  |  |   |       | 
|U.S. agency obligations                        |  |               | 68,719    |  |                      |   | 4,877   |                       |  |   | 116                 |  |  |                                               | 73,480    |  |  |   |       | 
|Residential mortgage-backed securities         |  |               | 1,644,580 |  |                      |   | 190,273 |                       |  |   | 96,055              |  |  |                                               | 1,738,798 |  |  |   | 17,276 | 
|Collateralized debt obligations                |  |               | 79,135    |  |                      |   | 22      |                       |  |   | 22,706              |  |  |                                               | 56,451    |  |  |   |       | 
|Asset-backed securities                        |  |               | 1,460,488 |  |                      |   | 1,228   |                       |  |   | 205,640             |  |  |                                               | 1,256,076 |  |  |   |       | 
|Short-term                                     |  |               | 962,007   |  |                      |   |        |                       |  |   |                    |  |  |                                               | 962,007   |  |  |   |       | 
|Other                                          |  |               | 1,278     |  |                      |   |        |                       |  |   |                    |  |  |                                               | 1,278     |  |  |   |       | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|                                               |  |               | 8,568,850 |  |                      |   | 346,407 |                       |  |   | 379,402             |  |  |                                               | 8,535,855 |  |  |   | 17,276 | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Fixed income securities pledged as collateral: |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|U.S. government obligations                    |  |               | 122,139   |  |                      |   | 1,688   |                       |  |   | 777                 |  |  |                                               | 123,050   |  |  |   |       | 
|U.S. agency obligations                        |  |               | 16,832    |  |                      |   | 617     |                       |  |   |                    |  |  |                                               | 17,449    |  |  |   |       | 
|Residential mortgage-backed securities         |  |               | 25,385    |  |                      |   | 1,482   |                       |  |   |                    |  |  |                                               | 26,867    |  |  |   |       | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Total collateralized investments               |  |               | 164,356   |  |                      |   | 3,787   |                       |  |   | 777                 |  |  |                                               | 167,366   |  |  |   |       | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 
|Total investments                              |  | $             | 8,733,206 |  |                      | $ | 350,194 |                       |  | $ | 380,179             |  |  | $                                             | 8,703,221 |  |  | $ | 17,276 | 
|                                               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |                                               |           |  |  |   |        | 



|(1) | Represents the amount of cumulative non-credit other-than-temporary impairment losses recognized in accumulated other comprehensive loss on securities that also had a
credit impairment. These losses are included in gross unrealized losses as of September 30, 2010 and December 31, 2009.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Foreign obligations at September 30, 2010 consist primarily of government issued securities which are denominated in Pounds Sterling. All Euro and Australian dollar denominated securities held as of
December 31, 2009 were sold in the first quarter of 2010.



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The amortized cost
and estimated fair value of investments, excluding VIE investments, at September 30, 2010, by contractual maturity, were as follows:



|                                       |  |               |           |  |                     |   |           | 
|-------------------------------------- |  | ------------- | --------- |  | ------------------- | - | --------- | 
|                                       |  | AmortizedCost |           |  | EstimatedFair Value |  
|Due in one year or less                |  | $             | 706,547   |  |                     | $ | 707,361   | 
|Due after one year through five years  |  |               | 871,220   |  |                     |   | 918,180   | 
|Due after five years through ten years |  |               | 774,225   |  |                     |   | 823,905   | 
|Due after ten years                    |  |               | 1,765,894 |  |                     |   | 1,861,520 | 
|                                       |  |               |           |  |                     |   |           | 
|                                       |  |               | 4,117,886 |  |                     |   | 4,310,966 | 
|Residential mortgage-backed securities |  |               | 1,245,389 |  |                     |   | 1,457,317 | 
|Collateralized debt obligations        |  |               | 41,534    |  |                     |   | 28,210    | 
|Other asset-backed securities          |  |               | 1,002,567 |  |                     |   | 983,762   | 
|                                       |  |               |           |  |                     |   |           | 
|                                       |  | $             | 6,407,376 |  |                     | $ | 6,780,255 | 
|                                       |  |               |           |  |                     |   |           | 

Expected maturities will differ from contractual maturities because borrowers may have the right to call or
prepay obligations with or without call or prepayment penalties.

Unrealized Losses:

The following table shows gross unrealized losses and fair values of Ambacs investments, aggregated by investment category and
length of time that the individual securities have been in a continuous unrealized loss position, at September 30, 2010 and December 31, 2009:



|                                       |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|-------------------------------------- |  | ------------------- | ------- |  | ------------------- | - | ------ | ---------- |  | - | ------------------- |  |  | ---------- | ------- |  | ------------------- | - | --------- |  |  | - | ------- | 
|                                       |  | Less Than 12 Months |         |  | 12 Months or More   |   |        | Total      | 
|                                       |  | Fair Value          |         |  | GrossUnrealizedLoss |   |        | Fair Value |  |   | GrossUnrealizedLoss |  |  | Fair Value |         |  | GrossUnrealizedLoss |  
|September 30, 2010:                    |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|Fixed income securities:               |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|Municipal obligations                  |  | $                   | 17,073  |  |                     | $ | 359    |            |  | $ | 35,324              |  |  | $          | 2,248   |  |                     | $ | 52,397    |  |  | $ | 2,607   | 
|Corporate obligations                  |  |                     | 1,195   |  |                     |   | 47     |            |  |   | 209,144             |  |  |            | 24,765  |  |                     |   | 210,339   |  |  |   | 24,812  | 
|Foreign obligations                    |  |                     |        |  |                     |   |       |            |  |   |                    |  |  |            |        |  |                     |   |          |  |  |   |        | 
|U.S. government obligations            |  |                     |        |  |                     |   |       |            |  |   |                    |  |  |            |        |  |                     |   |          |  |  |   |        | 
|U.S. agency obligations                |  |                     | 1,392   |  |                     |   | 2      |            |  |   |                    |  |  |            |        |  |                     |   | 1,392     |  |  |   | 2       | 
|Residential mortgage-backed securities |  |                     | 7,705   |  |                     |   | 2,012  |            |  |   | 125,133             |  |  |            | 44,011  |  |                     |   | 132,838   |  |  |   | 46,023  | 
|Collateralized debt obligations        |  |                     |        |  |                     |   |       |            |  |   | 28,180              |  |  |            | 13,353  |  |                     |   | 28,180    |  |  |   | 13,353  | 
|Other asset-backed securities          |  |                     | 29,404  |  |                     |   | 4,476  |            |  |   | 460,735             |  |  |            | 50,145  |  |                     |   | 490,139   |  |  |   | 54,621  | 
|                                       |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|Total temporarily impaired securities  |  | $                   | 56,769  |  |                     | $ | 6,896  |            |  | $ | 858,516             |  |  | $          | 134,522 |  |                     | $ | 915,285   |  |  | $ | 141,418 | 
|                                       |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|December 31, 2009:                     |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|Fixed income securities:               |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|Municipal obligations                  |  | $                   | 118,770 |  |                     | $ | 4,073  |            |  | $ | 90,775              |  |  | $          | 11,303  |  |                     | $ | 209,545   |  |  | $ | 15,376  | 
|Corporate obligations                  |  |                     | 182,129 |  |                     |   | 9,011  |            |  |   | 188,634             |  |  |            | 28,571  |  |                     |   | 370,763   |  |  |   | 37,582  | 
|Foreign obligations                    |  |                     | 21,037  |  |                     |   | 471    |            |  |   | 4,938               |  |  |            | 744     |  |                     |   | 25,975    |  |  |   | 1,215   | 
|U.S. government obligations            |  |                     | 68,073  |  |                     |   | 1,489  |            |  |   |                    |  |  |            |        |  |                     |   | 68,073    |  |  |   | 1,489   | 
|U.S. agency obligations                |  |                     | 4,345   |  |                     |   | 116    |            |  |   |                    |  |  |            |        |  |                     |   | 4,345     |  |  |   | 116     | 
|Residential mortgage-backed securities |  |                     | 220,419 |  |                     |   | 16,351 |            |  |   | 128,991             |  |  |            | 79,704  |  |                     |   | 349,410   |  |  |   | 96,055  | 
|Collateralized debt obligations        |  |                     | 4,541   |  |                     |   | 3,716  |            |  |   | 51,888              |  |  |            | 18,990  |  |                     |   | 56,429    |  |  |   | 22,706  | 
|Other asset-backed securities          |  |                     | 380,426 |  |                     |   | 43,029 |            |  |   | 735,190             |  |  |            | 162,611 |  |                     |   | 1,115,616 |  |  |   | 205,640 | 
|                                       |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 
|Total temporarily impaired securities  |  | $                   | 999,740 |  |                     | $ | 78,256 |            |  | $ | 1,200,416           |  |  | $          | 301,923 |  |                     | $ | 2,200,156 |  |  | $ | 380,179 | 
|                                       |  |                     |         |  |                     |   |        |            |  |   |                     |  |  |            |         |  |                     |   |           |  |  |   |         | 

Ambac has a formal impairment review process for all securities in its investment portfolio. Ambac conducts
a review each quarter to identify and evaluate investments that have indications of possible other than temporary impairment, including substantial or continuous declines in fair value below amortized cost or declines in external credit ratings from
the time the securities were purchased.



53



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



Management has determined that the unrealized losses reflected in the table above are temporary in nature as of September 30, 2010 and December 31, 2009 based upon (i) no
unexpected principal and interest payment defaults on these securities; (ii) analysis of the creditworthiness of the issuer and financial guarantor, as applicable, and analysis of projected defaults on the underlying collateral;
(iii) management has no intent to sell these investments in debt securities; and (iv) it is not more likely than not that Ambac will be required to sell these debt securities before the anticipated recovery of its amortized cost basis. The
assessment under (iv) is based on a comparison of future available liquidity from the fixed income investment portfolio against the projected net cash outflow from operating activities and debt service. For purposes of this assessment,
available liquidity from the fixed income investment portfolio is comprised of the fair value of securities for which management has asserted its intent to sell plus the scheduled maturities and interest payments from the remaining securities in the
portfolio. To the extent that securities that management intends to sell are in an unrealized loss position, they would have already been considered other-than-temporarily impaired with the amortized cost written down to fair value. As of
September 30, 2010, management has not asserted an intent to sell any securities from its portfolio, which would be considered immediately available for liquidity needs in our analysis. Because the above-described assessment indicates that
future available liquidity exceeds projected net cash outflow, it is not more likely than not that we would be required to sell securities before the recovery of their amortized cost basis. In the liquidity assessment described above, principal
payments on securities pledged as collateral are not considered to be available for other liquidity needs until the collateralized positions are projected to be settled. Projected interest receipts on securities pledged as collateral generally
belong to Ambac and are considered to be sources of available liquidity from the investment portfolio. As of September 30, 2010, for securities that have indications of possible other-than-temporary impairment but which management does not
intend to sell and will not more likely than not be required to sell, management compared the present value of cash flows expected to be collected to the amortized cost basis of the securities to assess whether the amortized cost will be recovered.
Cash flows were discounted at the effective interest rate implicit in the security at the date of acquisition. For floating rate securities, future cash flows and the discount rate used were both adjusted to reflect changes in the index rate
applicable to each security as of the evaluation date.

Of the securities that were in a gross unrealized loss position at
September 30, 2010, $114,643 of the total fair value and $37,985 of the unrealized loss related to below investment grade securities and non-rated securities. These included residential mortgage-backed securities that were rated below
investment grade which had a total fair value of $81,416 and unrealized loss balance of $29,303. Of the securities that were in a gross unrealized loss position at December 31, 2009, $114,391 of the total fair value and $34,987 of the
unrealized loss related to below investment grade securities and non-rated securities. These included residential mortgage-backed securities that were rated below investment grade which had a total fair value of $63,088 and unrealized loss balance
of $16,343.

Corporate obligations:

The decrease in gross unrealized losses on corporate obligations during the nine months ended September 30, 2010 is primarily the result of lower interest rates. Of the $24,765 of unrealized losses
on corporate obligations greater than 12 months, one security comprises $14,755 of the total. This security, which was purchased in multiple lots, is a closed-block life insurance issuance that is insured by Assured Guaranty Municipal Corporation,
has been in an unrealized loss position for 14-33 months. The unrealized loss on this security is the result of general credit spread widening on life insurers. Given the insured rating of AA- and Investment Grade underlying rating, management
believes that timely receipt of all principal and interest is probable.



54



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Residential
mortgage-backed securities:

The gross unrealized loss on mortgage-backed securities as of September 30, 2010 is
primarily related to Alt-A residential mortgage-backed securities. Of the $44,011 of unrealized losses on mortgage-backed securities for greater than 12 months, $43,900 or 99.7%, is attributable to 16 individual Alt-A securities. These individual
securities have been in an unrealized loss position for 33 months. Each of these Alt-A securities have very similar characteristics such as vintage of the underlying collateral (2004-2007) and placement in the structure (generally class-A tranche
rated triple-A at issuance). The significant declines in fair value relate to the actual and potential effects of declining U.S. housing prices, recent recession and weak economic conditions in general on the performance of collateral underlying
residential mortgage backed securities. This has been reflected in decreased liquidity for RMBS securities and increased risk premiums demanded by investors resulting in a required return on investment that is significantly higher than at the time
the securities were purchased.

As part of the quarterly impairment review process, management has analyzed the cash flows of
all Alt-A RMBS securities held based on the default, prepayment and severity loss assumptions specific to each securitys underlying collateral. Management has contracted consultants to model each of the securities in our portfolio. The cash
flow model incorporates actual cash flows on the mortgage loans through the current period, and then projects remaining cash flows using a number of loan-specific assumptions, including default rates, prepayment rates, and recovery rates. The model
then distributes those cash flows to various tranches of securities, considering the transaction structure and any subordination and credit enhancements that exist in that structure. Management considered this analysis in making our determination
that non-receipt of contractual cash flows is not probable on these transactions.

Other asset-backed securities:

The decrease in gross unrealized losses on other asset-backed securities during the nine months ended
September 30, 2010 is the result of sales of other asset-backed securities as well as the effect of improved market liquidity for certain higher quality, shorter term consumer asset-backed securities. As part of the quarterly impairment review
process, management monitors each deals performance metrics and other available qualitative and fundamental information in developing an analytical opinion. Ambac determined that there is sufficient credit enhancement to mitigate recent market
stresses. Management believes that the timely receipt of all principal and interest from other asset-backed securities is probable.



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Realized
Gains and Losses and Other-Than-Temporary Impairments:

The following table details amounts included in net realized
investment gains and losses and other-than-temporary impairments included in earnings for the three and nine months ended September 30, 2010 and 2009:



|                                                                                   |  |                                 |        |   |                                |   |         |      |  |   |         |   |  |   |            |  
|---------------------------------------------------------------------------------- |  | ------------------------------- | ------ | - | ------------------------------ | - | ------- | ---- |  | - | ------- | - |  | - | ---------- | -
|                                                                                   |  | Three months
endedSeptember 30, |        |   | Nine months
endedSeptember 30, |  
|                                                                                   |  | 2010                            |        |   | 2009                           |   |         | 2010 |  |   | 2009    |  
|Gross realized gains on securities                                                 |  | $                               | 1,407  |   |                                | $ | 116,084 |      |  | $ | 154,060 |   |  | $ | 164,417    |  
|Gross realized losses on securities                                                |  |                                 | (631   | ) |                                |   | (1,201  | )    |  |   | (86,501 | ) |  |   | (53,089    | )
|NCFE recoveries                                                                    |  |                                 |       |   |                                |   |        |      |  |   |        |   |  |   | 13         |  
|Net gain on investment agreement terminations                                      |  |                                 |       |   |                                |   | 96      |      |  |   | 73,516  |   |  |   | 120,911    |  
|Foreign exchange gains                                                             |  |                                 | 1,220  |   |                                |   | 46      |      |  |   | 1,583   |   |  |   | 3,201      |  
|                                                                                   |  |                                 |        |   |                                |   |         |      |  |   |         |   |  |   |            |  
|Net realized gains, excluding other-than-temporary impairments                     |  |                                 | 1,996  |   |                                |   | 115,025 |      |  |   | 142,658 |   |  |   | 235,453    |  
|Net other-than-temporary impairments(1)                                            |  |                                 | (6,584 | ) |                                |   | (44,189 | )    |  |   | (48,499 | ) |  |   | (1,736,522 | )
|Gain on extinguishment of debt                                                     |  |                                 |       |   |                                |   |        |      |  |   | 10,693  |   |  |   |           |  
|                                                                                   |  |                                 |        |   |                                |   |         |      |  |   |         |   |  |   |            |  
|Total net realized gains and other-than-temporary impairments included in earnings |  | $                               | (4,588 | ) |                                | $ | 70,836  |      |  | $ | 104,852 |   |  | $ | (1,501,069 | )
|                                                                                   |  |                                 |        |   |                                |   |         |      |  |   |         |   |  |   |            |  



|(1) | Other-than-temporary impairments since April 1, 2009 exclude impairment amounts recorded in other comprehensive income under ASC Paragraph 320-10-65-1, which
comprise non-credit related amounts on securities that are credit impaired but which management does not intend to sell and it is not more likely than not that the company will be required to sell before recovery of the amortized cost basis.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Other-than-temporary impairment charges to earnings for the three and nine months ended September 30, 2010
included $6,584 and $31,352, respectively, in credit losses on securities guaranteed by Ambac Assurance. Additionally, other-than-temporary impairments for the three and nine months ended September 30, 2010 included charges of $0 and $17,147,
respectively, to write-down the amortized cost basis of tax-exempt municipal bonds and student loan securities to fair value at their respective impairment dates as a result of managements previous intent to sell securities in connection with
plans to reposition the investment portfolio and to meet general liquidity needs, including amounts needed under the Settlement Agreement with CDS counterparties. As further described in Note 1, on March 24, 2010, the OCI commenced Segregated
Account Rehabilitation Proceedings in order to permit the OCI to facilitate an orderly run-off and/or settlement of the liabilities allocated to the Segregated Account. As a result of actions taken by OCI, financial guarantee payments on securities
guaranteed by Ambac Assurance which have been placed in the Segregated Account are no longer under the control of Ambac management. Accordingly, estimated cash flows on such securities have been adversely impacted resulting in credit losses.
Other-than-temporary impairment charges were $44,189 and $1,736,522 for the three and nine months ended September 30, 2009, respectively. Charges in 2009 included $0 and $9,900 for the three and nine months ended September 30,
respectively, related to write-downs of certain securities that were believed to be credit impaired and $44,189 and $1,726,622 for the three and nine months ended September 30, 2009, respectively, related to securities that management had the
intent to sell primarily to meet financial services liquidity needs at that time.

Credit losses on Ambac-guaranteed
securities which are included in other-than-temporary impairments for the three and nine months ended September 30, 2010 were estimated using market accepted cash flow models and inputs consistent with those used to develop loss reserves
described in Note 5. These credit losses relate primarily to Ambac-guaranteed RMBS senior bonds collateralized by either first or second-lien mortgage products. Pool cash flows are run through a market accepted deal model library based on either
loan level or pool level assumptions for underlying collaterals to project



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



cash flows on the bond level. Each RMBS transaction structural features are modeled, including loss allocations, triggers, prepayment penalty allocations, and interest-rate hedges. Through the
deal model waterfalls we generate principal and interest cash flow vectors for each tranche in the portfolio. For investments collateralized by first-lien mortgages, we employ a loan-level model which uses regression analysis derived from a subset
of two million mortgages to estimate the effect of projected Home Price Appreciation, unemployment, and interest rates on individual mortgages based on their individual characteristics. Variable values and loan conditions are updated monthly. The
model runs 300 simulations for each transaction. The heart of the framework, the discrete choice credit module, estimates the probability of monthly loan level credit performance evolutions through time across eight possible status states (current,
30 day delinquent, 60 day delinquent, 90 + day delinquent, foreclosure, REO, prepay, and default). Specific inputs used include: property type; occupancy; purpose; documentation; lien type; time to payment shock; effective LTV; change of monthly
LTV; FICO score; debt to income ratio; mortgage rate; initial spread; loan age; delinquency history; and macroeconomic factors including interest rates, unemployment rate, HPA rate, loan modification program and government rescue plan. Our loss
estimates for the second lien products in the RMBS portfolio were based on pool level assumptions. A monthly roll-rate methodology was applied to project future prepayment, default, and severity vectors on a pool-specific basis. We examined the
historical rate at which delinquent loans in each transaction rolled into later delinquency categories (i.e. 30-59 days, 60-89 days, 90+ days, and default) and used this data along with the most recent delinquency information to project a default
curve for the life of the transaction. Lifetime prepayment and loss severity factors were also projected by examining historical data. Specific inputs we used were: roll rates; initial delinquencies; prepayment rates; loss severity and burnout.
These modeling results on the underlying bonds are used along with assumptions about future guarantor claim payments as described below to determine credit losses.

Under the Segregated Account Rehabilitation Plan filed on October 8, 2010, future claim payments made by Ambac Assurance on these securities are expected to be 25% in cash and 75% in surplus notes.
All future cash payments on the surplus notes are subject to approval of OCI. The calculation of partial cash payments by Ambac Assurance is highly subjective and not readily available through market standard cash flow tools. To consider the
uncertainty of guarantor cash payments, particularly on the surplus notes, our analysis of credit impairment of Ambac-guaranteed securities in our investment portfolio reflects a weighted average of estimated future cash flows under two scenarios:
(i) the with guarantor scenario in which Ambac Assurance pays 100% of its claims in cash (weighted 30%) and (ii) the without guarantor scenario that fully excludes payments from Ambac Assurance (weighted 70%).
Although the Segregated Account Rehabilitation Plan contemplates payments of 25% of claims in cash, we have applied 30% weight to the with guarantor scenario to reflect assumed market participants expectations of future cash
payments from the surplus notes.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
table presents a roll-forward of Ambacs cumulative credit impairments that were recognized in earnings on securities held as of September 30, 2010:



|                                                            |  |                  |         |  
|----------------------------------------------------------- |  | ---------------- | ------- | -
|                                                            |  | CreditImpairment |        
|Balance as of January 1, 2010                               |  | $                | 98,654  |  
|Additions for credit impairments recognized on(1):          |  |                  |         |  
|Securities not previously impaired                          |  |                  | 16,688  |  
|Securities previously impaired                              |  |                  | 14,663  |  
|Reductions for credit impairments previously recognized on: |  |                  |         |  
|Securities that matured or were sold during the period      |  |                  | (1,296  | )
|                                                            |  |                  |         |  
|Balance as of September 30, 2010                            |  | $                | 128,709 |  
|                                                            |  |                  |         |  



|(1) | These additions are included in the Financial Guarantee net other-than-temporary impairment losses recognized in earnings of $48,499 in the Consolidated Statements of
Operations, as well as impairments on securities for which Ambac intended to sell.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Collateral and
Deposits with Regulators:

Ambac routinely pledges and receives collateral related to certain business lines and/or
transactions. The following is a description of those arrangements by collateral source:



| | (1) | Cash and securities held in Ambacs investment portfolio  Ambac pledges assets it holds in its investment portfolio to (a) investment and payment
agreement counterparties; and (b) derivative counterparties. Securities pledged to investment and payment agreement counterparties may not then be re-pledged to another entity. Ambacs counterparties under derivative agreements have the
right to pledge or rehypothecate the securities and as such, pledged securities are separately classified on the Consolidated Balance Sheets as Fixed income securities pledged as collateral, at fair value.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) | Cash and securities pledged to Ambac under derivative agreements  Ambac may repledge securities it holds from certain derivative counterparties to other
derivative counterparties in accordance with its rights and obligations under those agreements.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
table presents (i) the sources of collateral either received from various counterparties where Ambac is permitted to sell or re-pledge or directly held in the investment portfolio and (ii) how that collateral was pledged to various
investment and payment agreement, derivative and repurchase agreement counterparties at September 30, 2010 and December 31, 2009:



|                                                                   |  |                                           |           |  |                                                                                         |   |           |                                                                   |  |   |         | 
|------------------------------------------------------------------ |  | ----------------------------------------- | --------- |  | --------------------------------------------------------------------------------------- | - | --------- | ----------------------------------------------------------------- |  | - | ------- | 
|                                                                   |  | Fair Value ofCash andUnderlyingSecurities |           |  | Fair Value of Cashand SecuritiesPledged toInvestment
andPayment AgreementCounterparties |   |           | Fair Value ofCash andSecuritiesPledged toDerivativeCounterparties | 
|September 30, 2010:                                                |  |                                           |           |  |                                                                                         |   |           |                                                                   |  |   |         | 
|Sources of Collateral:                                             |  |                                           |           |  |                                                                                         |   |           |                                                                   |  |   |         | 
|Cash and securities pledged directly from the investment portfolio |  | $                                         | 1,256,507 |  |                                                                                         | $ | 964,754   |                                                                   |  | $ | 291,753 | 
|                                                                   |  |                                           |          
|Cash and securities pledged from its derivative counterparties     |  |                                           | 9,440     |  |                                                                                         |   |          |                                                                   |  |   | 9,440   | 
|                                                                   |  |                                           |          
|December 31, 2009:                                                 |  |                                           |           |  |                                                                                         |   |           |                                                                   |  |   |         | 
|Sources of Collateral:                                             |  |                                           |           |  |                                                                                         |   |           |                                                                   |  |   |         | 
|                                                                   |  |                                           |          
|Cash and securities pledged directly from the investment portfolio |  | $                                         | 1,322,341 |  |                                                                                         | $ | 1,125,528 |                                                                   |  | $ | 196,813 | 
|                                                                   |  |                                           |          
|Cash and securities pledged from its derivative counterparties     |  |                                           | 90,009    |  |                                                                                         |   |          |                                                                   |  |   | 90,009  | 

Securities carried at
$6,570 and $7,069 at September 30, 2010 and December 31, 2009, respectively, were deposited by Ambac Assurance and Everspan with governmental authorities or designated custodian banks as required by laws affecting insurance companies.

(9) Stockholders Equity

Stockholders Equity includes non-controlling interests primarily related to the preferred stock of Ambac Assurance. In the first nine months of 2009, Ambac Assurance sold an additional $100,000 of
preferred stock. Also, in the first nine months of 2009, Ambac Assurance retired 5,589 shares of preferred stock for $11,178; 4,686 of these shares were acquired in connection with a CDO commutation in July 2009. The retirement of the preferred
stock resulted in an increase in equity attributed to Ambac Financial Group, Inc. of $107,778 and $128,547 for the three and nine months ended September 30, 2009.



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
schedule presents the effects of changes in Ambac Financial Group, Inc.s ownership interest in Ambac Assurance on the equity attributable to Ambac Financial Group, Inc.:

Net Income Attributable to Ambac Financial Group, Inc.

Transfers (to)
from the noncontrolling interest



|                                                                                                                              |  |                                 |        |  |                                |   |           |      |  |   |          |   |  |   |          |  
|----------------------------------------------------------------------------------------------------------------------------- |  | ------------------------------- | ------ |  | ------------------------------ | - | --------- | ---- |  | - | -------- | - |  | - | -------- | -
|                                                                                                                              |  | Three Months
EndedSeptember 30, |        |  | Nine Months
EndedSeptember 30, |  
|                                                                                                                              |  | 2010                            |        |  | 2009                           |   |           | 2010 |  |   | 2009     |  
|Net income attributable to Ambac Financial Group, Inc.                                                                        |  | $                               | 76,006 |  |                                | $ | 2,188,257 |      |  | $ | (671,604 | ) |  | $ | (572,724 | )
|Transfers (to) from the noncontrolling interest:                                                                              |  |                                 |        |  |                                |   |           |      |  |   |          |   |  |   |          |  
|Increase in Ambac Financial Group, Incs paid-in-capital from retirement of 4,686 and 5,589 shares of preferred stock in
2009 |  |                                 |       |  |                                |   | 107,778   |      |  |   |         |   |  |   | 128,547  |  
|                                                                                                                              |  |                                 |        |  |                                |   |           |      |  |   |          |   |  |   |          |  
|Change from net income attributable to Ambac Financial Group, Inc. and transfers (to) from noncontrolling
interest            |  | $                               | 76,006 |  |                                | $ | 2,296,035 |      |  | $ | (671,604 | ) |  | $ | (444,177 | )
|                                                                                                                              |  |                                 |        |  |                                |   |           |      |  |   |          |   |  |   |          |  

In June 2010, Ambac entered into a series of debt for equity exchanges with certain holders of Ambacs
9.375% debentures, due August 2011. Ambac has issued an aggregate of 13,638,482 shares of its common stock in exchange for $20,311 in aggregate principal amount of the 2011 debentures. Ambac recognized a gain on the extinguishment of these
debentures in the amount of $10,693, which was the difference between the fair value of the new shares issued less than the net carrying value of the debentures.

(10) Segment Information

Ambac has two reportable segments, as follows:
(1) Financial Guarantee, which provided financial guarantees (including credit derivatives) for public finance, structured finance and other obligations; and (2) Financial Services, which provided investment agreements, funding conduits,
interest rate and currency swaps, principally to clients of the financial guarantee business, which includes municipalities and other public entities, health care organizations, investor-owned utilities and asset-backed issuers. Ambacs
reportable segments were strategic business units that offered different products and services. They are managed separately because each business required different marketing strategies, personnel skill sets and technology.

Transactions between the financial guarantee and financial services segment include (i) premiums for Ambac Assurances
financial guarantee of the swap and investment agreement obligations of its Financial Services subsidiaries; (ii) interest on loans that Ambac Assurance provides to the Financial Services businesses; (iii) interest rate swaps between the
Financial Guarantee Segment and the Financial Services Segment; (iv) interest rate swaps between consolidated VIEs and the Financial Services business; and (v) fees relating to advisory services provided by RangeMark to Ambac Assurance
(prior to the sale of RangeMark in July 2010).

Information provided below for Corporate and Other relates to
(i) investment advisory services to the structured credit markets prior to the sale of RangeMark in July 2010 and (ii) corporate activities, including interest expense on debentures. Corporate and other revenue from unaffiliated customers
consists primarily of income from investments. Inter-segment revenues consist of dividends received.



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
table is a summary of financial information by reportable segment as of and for the three and nine months ended September 30, 2010 and 2009:



|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|-------------------------------- |  | ------------------ | ---------- | - | ----------------- | - | --------- | ------------------ |  | - | ------------------------- | - |  | ------------ | --- | - |  | - | ---------- | 
|Three months ended September 30, |  | FinancialGuarantee |            |   | FinancialServices |   |           | Corporateand Other |  |   | Inter-segmentEliminations |   |  | Consolidated |    
|2010:                            |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Revenues:                        |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Unaffiliated customers           |  | $                  | 431,042    |   |                   | $ | (69,479   | )                  |  | $ | (407                      | ) |  | $            |    |   |  | $ | 361,156    | 
|Inter-segment                    |  |                    | (91,284    | ) |                   |   | 91,372    |                    |  |   |                          |   |  |              | (88 | ) |  |   |           | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Total revenues                   |  | $                  | 339,758    |   |                   | $ | 21,893    |                    |  | $ | (407                      | ) |  | $            | (88 | ) |  | $ | 361,156    | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Income before income taxes:      |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Unaffiliated customers           |  | $                  | 196,954    |   |                   | $ | (76,890   | )                  |  | $ | (43,980                   | ) |  | $            |    |   |  | $ | 76,084     | 
|Inter-segment                    |  |                    | (91,536    | ) |                   |   | 92,926    |                    |  |   | (1,390                    | ) |  |              |    |   |  |   |           | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Total income before income taxes |  | $                  | 105,418    |   |                   | $ | 16,036    |                    |  | $ | (45,370                   | ) |  | $            |    |   |  | $ | 76,084     | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Total assets                     |  | $                  | 29,521,319 |   |                   | $ | 1,741,540 |                    |  | $ | 65,380                    |   |  | $            |    |   |  | $ | 31,328,239 | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|2009:                            |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Revenues:                        |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Unaffiliated customers           |  | $                  | 2,873,269  |   |                   | $ | (187,552  | )                  |  | $ | 1,109                     |   |  | $            |    |   |  | $ | 2,686,826  | 
|Inter-segment                    |  |                    | (64,775    | ) |                   |   | 64,605    |                    |  |   |                          |   |  |              | 170 |   |  |   |           | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Total revenues                   |  | $                  | 2,808,494  |   |                   | $ | (122,947  | )                  |  | $ | 1,109                     |   |  | $            | 170 |   |  | $ | 2,686,826  | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Income before income taxes:      |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Unaffiliated customers           |  | $                  | 2,386,044  |   |                   | $ | (197,301  | )                  |  | $ | (34,784                   | ) |  | $            |    |   |  | $ | 2,153,959  | 
|Inter-segment                    |  |                    | (69,644    | ) |                   |   | 69,119    |                    |  |   | (301                      | ) |  |              | 826 |   |  |   |           | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Total income before income taxes |  | $                  | 2,316,400  |   |                   | $ | (128,182  | )                  |  | $ | (35,085                   | ) |  | $            | 826 |   |  | $ | 2,153,959  | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 
|Total assets                     |  | $                  | 15,191,745 |   |                   | $ | 2,707,116 |                    |  | $ | 200,195                   |   |  | $            |    |   |  | $ | 18,099,056 | 
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |     |   |  |   |            | 



|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|-------------------------------- |  | ------------------ | ---------- | - | ----------------- | - | --------- | ------------------ |  | - | ------------------------- | - |  | ------------ | ------ | - |  | - | ---------- | -
|Nine months ended September 30,  |  | FinancialGuarantee |            |   | FinancialServices |   |           | Corporateand Other |  |   | Inter-segmentEliminations |   |  | Consolidated |       
|2010:                            |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Revenues:                        |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Unaffiliated customers           |  | $                  | 362,106    |   |                   | $ | (130,666  | )                  |  | $ | 11,747                    |   |  | $            |       |   |  | $ | 243,187    |  
|Inter-segment                    |  |                    | (277,380   | ) |                   |   | 277,659   |                    |  |   | 2,808                     |   |  |              | (3,087 | ) |  |   |           |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Total revenues                   |  | $                  | 84,726     |   |                   | $ | 146,993   |                    |  | $ | 14,555                    |   |  | $            | (3,087 | ) |  | $ | 243,187    |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Income before income taxes:      |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Unaffiliated customers           |  | $                  | (400,773   | ) |                   | $ | (154,619  | )                  |  | $ | (116,175                  | ) |  | $            |       |   |  | $ | (671,567   | )
|Inter-segment                    |  |                    | (285,153   | ) |                   |   | 282,091   |                    |  |   | 3,062                     |   |  |              |       |   |  |   |           |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Total income before income taxes |  | $                  | (685,926   | ) |                   | $ | 127,472   |                    |  | $ | (113,113                  | ) |  | $            |       |   |  | $ | (671,567   | )
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Total assets                     |  | $                  | 29,521,319 |   |                   | $ | 1,741,540 |                    |  | $ | 65,380                    |   |  | $            |       |   |  | $ | 31,328,239 |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|2009:                            |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Revenues:                        |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Unaffiliated customers           |  | $                  | 3,648,019  |   |                   | $ | (344,683  | )                  |  | $ | 33,358                    |   |  | $            |       |   |  | $ | 3,336,694  |  
|Inter-segment                    |  |                    | (49,340    | ) |                   |   | 50,034    |                    |  |   | 359                       |   |  |              | (1,053 | ) |  |   |           |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Total revenues                   |  | $                  | 3,598,679  |   |                   | $ | (294,649  | )                  |  | $ | 33,717                    |   |  | $            | (1,053 | ) |  | $ | 3,336,694  |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Income before income taxes:      |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Unaffiliated customers           |  | $                  | 1,084,663  |   |                   | $ | (383,024  | )                  |  | $ | (62,902                   | ) |  | $            |       |   |  | $ | 638,737    |  
|Inter-segment                    |  |                    | (54,210    | ) |                   |   | 54,152    |                    |  |   | 58                        |   |  |              |       |   |  |   |           |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Total income before income taxes |  | $                  | 1,030,453  |   |                   | $ | (328,872  | )                  |  | $ | (62,844                   | ) |  | $            |       |   |  | $ | 638,737    |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  
|Total assets                     |  | $                  | 15,191,745 |   |                   | $ | 2,707,116 |                    |  | $ | 200,195                   |   |  | $            |       |   |  | $ | 18,099,056 |  
|                                 |  |                    |            |   |                   |   |           |                    |  |   |                           |   |  |              |        |   |  |   |            |  



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The following
table summarizes gross premiums written, net premiums earned and the net change in fair value of credit derivatives included in the Financial Guarantee segment by location of risk for the three and nine months ended September 30, 2010 and 2009:



|                    |  |                                       |          |   |                                       |   |         |                                             |  |   |                      |   |  |                   |          |   |                                             |   |         |  |  |   |           | 
|------------------- |  | ------------------------------------- | -------- | - | ------------------------------------- | - | ------- | ------------------------------------------- |  | - | -------------------- | - |  | ----------------- | -------- | - | ------------------------------------------- | - | ------- |  |  | - | --------- | 
|                    |  | Three Months Ended September 30, 2010 |          |   | Three Months Ended September 30, 2009 |  
|                    |  | GrossPremiumsWritten                  |          |   | Net PremiumsEarned                    |   |         | Net Change inFair Value ofCreditDerivatives |  |   | GrossPremiumsWritten |   |  | NetPremiumsEarned |          |   | Net Changein Fair Valueof CreditDerivatives |  
|United States       |  | $                                     | 43,435   |   |                                       | $ | 102,145 |                                             |  | $ | 13,530               |   |  | $                 | (85,001  | ) |                                             | $ | 143,741 |  |  | $ | 1,943,189 | 
|United Kingdom      |  |                                       | 20,005   |   |                                       |   | 32,176  |                                             |  |   | 169                  |   |  |                   | (45,988  | ) |                                             |   | 71,912  |  |  |   | 13,628    | 
|Other international |  |                                       | (10,240  | ) |                                       |   | 8,764   |                                             |  |   | (4,287               | ) |  |                   | (100,224 | ) |                                             |   | 22,748  |  |  |   | 176,087   | 
|                    |  |                                       |          |   |                                       |   |         |                                             |  |   |                      |   |  |                   |          |   |                                             |   |         |  |  |   |           | 
|Total               |  | $                                     | 53,200   |   |                                       | $ | 143,085 |                                             |  | $ | 9,412                |   |  | $                 | (231,213 | ) |                                             | $ | 238,401 |  |  | $ | 2,132,904 | 
|                    |  |                                       |          |   |                                       |   |         |                                             |  |   |                      |   |  |                   |          |   |                                             |   |         |  |  |   |           | 
|                    |  |                                      
|                    |  | Nine Months Ended September 30, 2010  |          |   | Nine Months Ended September 30, 2009  |  
|                    |  | GrossPremiumsWritten                  |          |   | Net PremiumsEarned                    |   |         | Net Change inFair Value ofCreditDerivatives |  |   | GrossPremiumsWritten |   |  | NetPremiumsEarned |          |   | Net Changein Fair Valueof CreditDerivatives |  
|United States       |  | $                                     | (70,108  | ) |                                       | $ | 316,383 |                                             |  | $ | (66,365              | ) |  | $                 | (198,321 | ) |                                             | $ | 427,305 |  |  | $ | 3,372,566 | 
|United Kingdom      |  |                                       | (9,085   | ) |                                       |   | 65,344  |                                             |  |   | 14,921               |   |  |                   | (29,744  | ) |                                             |   | 111,720 |  |  |   | 8,271     | 
|Other international |  |                                       | (58,742  | ) |                                       |   | 53,594  |                                             |  |   | 95,898               |   |  |                   | (160,819 | ) |                                             |   | 73,920  |  |  |   | 298,880   | 
|                    |  |                                       |          |   |                                       |   |         |                                             |  |   |                      |   |  |                   |          |   |                                             |   |         |  |  |   |           | 
|Total               |  | $                                     | (137,935 | ) |                                       | $ | 435,321 |                                             |  | $ | 44,454               |   |  | $                 | (388,884 | ) |                                             | $ | 612,945 |  |  | $ | 3,679,717 | 
|                    |  |                                       |          |   |                                       |   |         |                                             |  |   |                      |   |  |                   |          |   |                                             |   |         |  |  |   |           | 

(11) Fair Value Measurements

ASC Topic 820, Fair Value Measurements and Disclosures establishes a framework for measuring fair value and disclosures about fair value measurements.



62



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





The carrying
amount and estimated fair value of financial instruments are presented below:



|                                                                |  |                    |            |  |                     |   |            |                |  |   |                     |  |  |   |           | 
|--------------------------------------------------------------- |  | ------------------ | ---------- |  | ------------------- | - | ---------- | -------------- |  | - | ------------------- |  |  | - | --------- | 
|                                                                |  | September 30, 2010 |            |  | December 31, 2009   |  
|                                                                |  | CarryingAmount     |            |  | EstimatedFair Value |   |            | CarryingAmount |  |   | EstimatedFair Value | 
|Financial assets:                                               |  |                    |            |  |                     |   |            |                |  |   |                     |  |  |   |           | 
|Fixed income securities(1)                                      |  | $                  | 5,968,020  |  |                     | $ | 5,968,020  |                |  | $ | 7,572,570           |  |  | $ | 7,572,570 | 
|Fixed income securities pledged as collateral(1)                |  |                    | 194,387    |  |                     |   | 194,387    |                |  |   | 167,366             |  |  |   | 167,366   | 
|Short-term investments                                          |  |                    | 617,748    |  |                     |   | 617,748    |                |  |   | 962,007             |  |  |   | 962,007   | 
|Other investments                                               |  |                    | 100        |  |                     |   | 100        |                |  |   | 1,278               |  |  |   | 1,278     | 
|Cash                                                            |  |                    | 69,673     |  |                     |   | 69,673     |                |  |   | 112,079             |  |  |   | 112,079   | 
|Loans                                                           |  |                    | 20,999     |  |                     |   | 22,791     |                |  |   | 80,410              |  |  |   | 93,614    | 
|Derivative assets                                               |  |                    | 298,757    |  |                     |   | 298,757    |                |  |   | 496,494             |  |  |   | 496,494   | 
|Other assets                                                    |  |                    | 18,758     |  |                     |   | 18,758     |                |  |   | 18,843              |  |  |   | 18,843    | 
|Variable interest entity assets:                                |  |                    |            |  |                     |   |            |                |  |   |                     |  |  |   |           | 
|Fixed income securities                                         |  |                    | 1,939,492  |  |                     |   | 1,939,492  |                |  |   | 525,947             |  |  |   | 525,947   | 
|Restricted cash                                                 |  |                    | 1,952      |  |                     |   | 1,952      |                |  |   | 1,151               |  |  |   | 1,151     | 
|Loans                                                           |  |                    | 17,201,665 |  |                     |   | 17,182,399 |                |  |   | 2,635,961           |  |  |   | 2,615,260 | 
|Derivative assets                                               |  |                    | 4,362      |  |                     |   | 4,362      |                |  |   | 109,411             |  |  |   | 109,411   | 
|Financial liabilities:                                          |  |                    |            |  |                     |   |            |                |  |   |                     |  |  |   |           | 
|Obligations under investment, repurchase and payment agreements |  | $                  | 916,196    |  |                     | $ | 953,170    |                |  | $ | 1,290,933           |  |  | $ | 1,341,280 | 
|Long-term debt                                                  |  |                    | 1,823,327  |  |                     |   | 507,177    |                |  |   | 1,631,556           |  |  |   | 358,864   | 
|Derivative liabilities                                          |  |                    | 486,878    |  |                     |   | 486,878    |                |  |   | 3,536,858           |  |  |   | 3,536,858 | 
|Liability for net financial guarantees written                  |  |                    | 5,714,720  |  |                     |   | 1,392,714  |                |  |   | 5,639,122           |  |  |   | 2,035,987 | 
|Variable interest entity liabilities:                           |  |                    |            |  |                     |   |            |                |  |   |                     |  |  |   |           | 
|Long-term debt                                                  |  |                    | 17,335,034 |  |                     |   | 17,303,455 |                |  |   | 3,008,628           |  |  |   | 2,974,654 | 
|Derivative liabilities                                          |  |                    | 1,581,681  |  |                     |   | 1,581,681  |                |  |   |                    |  |  |   |          | 



|(1) | See breakout of fixed income securities in Note 8.
|--- | --------------------------------------------------

Fair value Hierarchy:

ASC Topic 820 specifies a fair value
hierarchy based on whether the inputs to valuation techniques used to measure fair value are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect Company-based market
assumptions. In accordance with ASC Topic 820, the fair value hierarchy prioritizes model inputs into three broad levels as follows:



| |  |           |  |   |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
| |  | --------- |  | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |  |  Level 1 |  |  |  | Quoted prices for identical instruments in active markets. Assets and liabilities classified as Level 1 include USTreasury securities, exchange traded futures contracts,
money market funds and mutual funds.                                                                                                                                                                                                                                                                                                                                                                                                                                                         
| |  |           | 
| |  |  Level 2 |  |  |  | Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in marketsthat are not active; and model-derived valuations
in which all significant inputs and significant value drivers areobservable in active markets. Assets and liabilities classified as Level 2 generally include direct investments in fixedincome securities representing municipal, asset-backed
and corporate obligations, financial services derivatives(including interest rate and currency swap derivatives and certain credit derivative contracts) and most long-termdebt of variable interest entities consolidated under ASC Topic
810.



63



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





| |  |   |         |  |  |   |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
| |  | - | ------- |  |  | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |  |  | Level 3 |  |  |  |  | Model derived valuations in which one or more significant inputs or significant value drivers are unobservable. This hierarchy requires the use of observable market data when
available. Assets and liabilities classified as Level 3 include most credit derivative contracts written as part of the financial guarantee business, certain financial services interest rate swaps contracts which are not referenced to commonly
quoted interest rates and certain investments in fixed income securities. Additionally, Level 3 assets and liabilities generally include fixed income securities and loan receivables, as well as certain long-term debt of variable interest entities
consolidated under ASC Topic 810.

The following table sets forth Ambacs financial assets
and liabilities that were accounted for at fair value as of September 30, 2010 and December 31, 2009 by level within the fair value hierarchy. As required by ASC Topic 820, financial assets and liabilities are classified in their entirety
based on the lowest level of input that is significant to the fair value measurement.



|                                                |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|----------------------------------------------- |  | ------- | --------- |  | ------- | - | --------- | ------- |  | - | ---------- |  |  | - | ---------- | 
|                                                |  | Level 1 |           |  | Level 2 |   |           | Level 3 |  |   | Total      | 
|September 30, 2010                              |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Financial assets:                               |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Fixed income securities:                        |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Municipal obligations                           |  | $       |          |  |         | $ | 2,190,500 |         |  | $ |           |  |  | $ | 2,190,500  | 
|Corporate obligations                           |  |         |          |  |         |   | 923,514   |         |  |   | 8,233      |  |  |   | 931,747    | 
|Foreign obligations                             |  |         |          |  |         |   | 121,076   |         |  |   |           |  |  |   | 121,076    | 
|U.S. government obligations                     |  |         | 174,798   |  |         |   |          |         |  |   |           |  |  |   | 174,798    | 
|U.S. agency obligations                         |  |         |          |  |         |   | 88,788    |         |  |   | 1,392      |  |  |   | 90,180     | 
|Residential mortgage-backed securities          |  |         |          |  |         |   | 1,447,746 |         |  |   |           |  |  |   | 1,447,746  | 
|Collateralized debt obligations                 |  |         |          |  |         |   | 704       |         |  |   | 27,506     |  |  |   | 28,210     | 
|Other asset-backed securities                   |  |         |          |  |         |   | 825,608   |         |  |   | 158,155    |  |  |   | 983,763    | 
|Short term investments                          |  |         | 617,748   |  |         |   |          |         |  |   |           |  |  |   | 617,748    | 
|Other investments(1)                            |  |         |          |  |         |   |          |         |  |   |           |  |  |   |           | 
|Fixed income securities, pledged as collateral: |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|U.S. government obligations                     |  |         | 184,816   |  |         |   |          |         |  |   |           |  |  |   | 184,816    | 
|Residential mortgage-backed securities          |  |         |          |  |         |   | 9,571     |         |  |   |           |  |  |   | 9,571      | 
|Cash                                            |  |         | 69,673    |  |         |   |          |         |  |   |           |  |  |   | 69,673     | 
|Derivative assets:                              |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Interest rate swaps                             |  |         |          |  |         |   | 156,779   |         |  |   | 141,978    |  |  |   | 298,757    | 
|Other assets                                    |  |         |          |  |         |   |          |         |  |   | 18,758     |  |  |   | 18,758     | 
|Variable interest entity assets:                |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Fixed income securities:                        |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Corporate obligations                           |  |         |          |  |         |   |          |         |  |   | 1,939,492  |  |  |   | 1,939,492  | 
|Restricted cash                                 |  |         | 1,952     |  |         |   |          |         |  |   |           |  |  |   | 1,952      | 
|Loans                                           |  |         |          |  |         |   |          |         |  |   | 17,007,648 |  |  |   | 17,007,648 | 
|Derivative assets:                              |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Credit derivatives                              |  |         |          |  |         |   |          |         |  |   | 4,362      |  |  |   | 4,362      | 
|                                                |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 
|Total financial assets                          |  | $       | 1,048,987 |  |         | $ | 5,764,286 |         |  | $ | 19,307,524 |  |  | $ | 26,120,797 | 
|                                                |  |         |           |  |         |   |           |         |  |   |            |  |  |   |            | 



64



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|---------------------------------------------- |  | - | --------- |  |  | - | ---------- |  |  | - | --------- |  |  | - | ---------- | 
|Financial liabilities:                         |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Derivative liabilities:                        |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Credit derivatives                             |  | $ |          |  |  | $ |           |  |  | $ | 232,528   |  |  | $ | 232,528    | 
|Interest rate swaps                            |  |   |          |  |  |   | 13,698     |  |  |   | 229,204   |  |  |   | 242,902    | 
|Futures contracts                              |  |   | 3,317     |  |  |   |           |  |  |   |          |  |  |   | 3,317      | 
|Currency swaps                                 |  |   |          |  |  |   | 7,842      |  |  |   |          |  |  |   | 7,842      | 
|Other contracts                                |  |   |          |  |  |   | 289        |  |  |   |          |  |  |   | 289        | 
|Variable interest entity liabilities:          |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Long-term debt                                 |  |   |          |  |  |   | 15,082,149 |  |  |   | 2,048,230 |  |  |   | 17,130,379 | 
|Derivative liabilities:                        |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Interest rate swaps                            |  |   |          |  |  |   | 1,569,550  |  |  |   |          |  |  |   | 1,569,550  | 
|Currency swaps                                 |  |   |          |  |  |   | 12,131     |  |  |   |          |  |  |   | 12,131     | 
|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|                                               |  | $ | 3,317     |  |  | $ | 16,685,659 |  |  | $ | 2,509,962 |  |  | $ | 19,198,938 | 
|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|                                               |  |   |           | 
|December 31, 2009                              |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Financial assets:                              |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Fixed income securities                        |  | $ | 233,416   |  |  | $ | 7,149,554  |  |  | $ | 189,600   |  |  | $ | 7,572,570  | 
|Fixed income securities, pledged as collateral |  |   | 123,050   |  |  |   | 44,316     |  |  |   |          |  |  |   | 167,366    | 
|Short-term investments                         |  |   | 962,007   |  |  |   |           |  |  |   |          |  |  |   | 962,007    | 
|Other investments(1)                           |  |   |          |  |  |   | 1,178      |  |  |   |          |  |  |   | 1,178      | 
|Cash                                           |  |   | 112,079   |  |  |   |           |  |  |   |          |  |  |   | 112,079    | 
|Derivative assets                              |  |   | 10,125    |  |  |   | 112,003    |  |  |   | 374,366   |  |  |   | 496,494    | 
|Other assets                                   |  |   |          |  |  |   |           |  |  |   | 18,843    |  |  |   | 18,843     | 
|Variable interest entity assets:               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Fixed income securities                        |  |   |          |  |  |   | 365,429    |  |  |   | 160,518   |  |  |   | 525,947    | 
|Restricted cash                                |  |   | 1,151     |  |  |   |           |  |  |   |          |  |  |   | 1,151      | 
|Loans                                          |  |   |          |  |  |   |           |  |  |   | 2,428,352 |  |  |   | 2,428,352  | 
|Derivative assets                              |  |   |          |  |  |   | 109,411    |  |  |   |          |  |  |   | 109,411    | 
|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Total financial assets                         |  | $ | 1,441,828 |  |  | $ | 7,781,891  |  |  | $ | 3,171,679 |  |  | $ | 12,395,398 | 
|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Financial liabilities:                         |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Derivative liabilities                         |  | $ |          |  |  | $ | 164,045    |  |  | $ | 3,372,813 |  |  | $ | 3,536,858  | 
|Variable interest entity liabilities:          |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Long-term debt                                 |  |   |           |  |  |   | 2,401,553  |  |  |   | 388,003   |  |  |   | 2,789,556  | 
|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 
|Total financial liabilities                    |  | $ |          |  |  | $ | 2,565,598  |  |  | $ | 3,760,816 |  |  | $ | 6,326,414  | 
|                                               |  |   |           |  |  |   |            |  |  |   |           |  |  |   |            | 



|(1) | Excludes a $100 investment in 2010 and 2009, which is carried in the Consolidated Balance Sheets at cost.
|--- | ---------------------------------------------------------------------------------------------------------

Determination of Fair Value:

When available, the Company generally uses quoted market prices to determine fair value, and classifies such items within Level 1. Because many fixed income securities do not trade on a daily basis,
pricing sources apply available information through processes such as matrix pricing to calculate fair value. In those cases the items are classified within Level 2. If quoted market prices are not available, fair value is based upon models that
use, where possible, current market-based or independently-sourced market parameters. Items valued using valuation models are classified according to the lowest level input or value driver that is significant to the valuation. Thus, an item may be
classified in Level 3 even though there may be significant inputs that are readily observable.

The determination of fair
value for financial instruments categorized in Level 2 or 3 involves significant judgment due to the complexity of factors contributing to the valuation. The current market disruptions make valuation even more difficult and subjective. Third-party
sources from which we obtain



65



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##### Table of Contents

|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



independent market quotes also use assumptions, judgments and estimates in determining financial instrument values and different third parties may use different methodologies or provide different
prices for securities. We believe the potential for differences in third-party pricing levels is particularly significant with respect to residential mortgage backed and certain other asset-backed securities held in our investment portfolio,
referenced in our credit derivative portfolio or issued as long-term debt of certain consolidated variable interest entities, due to the very low levels of recent trading activity for such securities. In addition, the use of internal valuation
models for certain highly structured instruments such as credit default swaps, require assumptions about markets in which there has been a negligible amount of trading activity for an extended period of time. As a result of these factors, the actual
trade value of a financial instrument in the market, or exit value of a financial instrument position by Ambac, may be significantly different from its recorded fair value.

Ambacs financial instruments carried at fair value are mainly comprised of investments in fixed income securities, derivative instruments, most variable interest entity assets and liabilities and
equity interests in Ambac sponsored special purpose entities.

We reflect Ambacs own creditworthiness in the fair value
of financial liability by including a credit valuation adjustment (CVA) in the determination of fair value. A decline in Ambacs creditworthiness as perceived by market participants will generally result in a higher CVA, thereby
lowering the fair value of Ambacs financial liabilities as reported. Through March 31, 2010 the CVA was determined using credit spreads observed in the market pricing of credit default swaps on Ambac or Ambac Assurance. The Ambac
Assurance CVA at September 30, 2010 is internally estimated using related data points, including the final settlement value of Ambac Assurance credit default swaps (determined through auction in June 2010) and current quoted prices of
securities guaranteed by Ambac Assurance.

Fixed Income Securities:

The fair values of fixed income investment securities held by Ambac and its operating subsidiaries are based primarily on market prices
received from dealer quotes or alternative pricing sources with reasonable levels of price transparency. Such quotes generally consider a variety of factors, including recent trades of the same and similar securities. For those fixed income
investments where quotes were not available, fair values are based on internal valuation models. Key inputs to the internal valuation models include maturity date, coupon and yield curves for asset-type and credit rating characteristics that closely
match those characteristics of the specific investment securities being valued. At September 30, 2010, approximately 7%, 81%, and 3% of the investment portfolio (excluding variable interest entity investments) was valued using dealer quotes,
alternative pricing sources with reasonable levels of price transparency, and internal valuation models, respectively. Approximately 9% of the investment portfolio, which represents short-term money market funds, was valued based on amortized cost.

Third party quotes represent the only input to the reported fair value of Level 2 fixed income securities. Fixed income
securities are classified as Level 3 when the fair value is internally modeled. Information about the valuation inputs for fixed income securities classified as Level 3 is included below:

Corporate obligations: These securities represent interest only strips of investment grade corporate obligations. Fair value was
calculated using a discounted cash flow approach with the discount rate determined from the yields of corporate bonds from the same issuers. Significant inputs for the valuation at September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 0.60%
| | -- | ------------------



66



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|Item 1. | Notes to Unaudited Consolidated Financial Statements
|------- | ----------------------------------------------------

| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



| | b. | Maturity: 22.70 years
| | -- | ---------------------



| | c. | Discount rate: 6.38%
| | -- | --------------------

U.S.
agency obligations: These notes are secured by separate lease rental agreements with the U.S. Government acting through the General Services Administration. Fair value was calculated using a discounted cash flow approach with the yield
based on comparable U.S. agency securities. Significant inputs for the valuation at September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 6.875%
| | -- | -------------------



| | b. | Maturity: 0.13 years
| | -- | --------------------



| | c. | Yield: 2.76%
| | -- | ------------

Collateralized
debt obligations: Securities are floating rate senior notes with the underlying securities of the CDO consist of subordinated bank perpetual preferred securities. Fair value was calculated using a discounted cash flow approach with expected
future cash flows discounted using a yield curve consistent with the security type and rating. Significant inputs for the valuation at September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 1.00%
| | -- | ------------------



| | b. | Weighted Average Life: 15.07 years
| | -- | ----------------------------------



| | c. | Yield curve rate corresponding to WAL: 9.29%
| | -- | --------------------------------------------

Asset-backed securities: These securities are floating rate investment grade notes collateralized by various asset types. Fair value was calculated using a discounted cash flow approach with
expected future cash flows discounted using a yield curve consistent with the security type and rating. Significant inputs for the valuation at September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 0.95%
| | -- | ------------------



| | b. | Weighted Average Life: 6.66 years
| | -- | ---------------------------------



| | c. | Yield curve rate corresponding to WAL: 3.83%
| | -- | --------------------------------------------

Derivative Instruments:

Ambacs derivative instruments comprise
interest rate, currency, and credit default swaps and exchange traded futures contracts. Fair value is determined based upon market quotes from independent sources, when available. When independent quotes are not available, fair value is determined
using valuation models. These valuation models require market-driven inputs, including contractual terms, credit spreads and ratings on underlying referenced obligations, yield curves and tax-exempt interest ratios. Under ASC Topic 820, Ambac is
required to consider its own credit risk when measuring the fair value of derivative and other liabilities. The fair value of net credit derivative liabilities was reduced by $930,111 and $13,230,000 at September 30, 2010 and December 31,
2009, respectively, as a result of incorporating a CVA on Ambac Assurance into the valuation model for these transactions. Interest rate swaps, currency swaps or other derivative liabilities may also require an adjustment to fair value to reflect
Ambac Assurances credit risk. Factors considered in estimating the amount of any Ambac CVA on such contracts include collateral posting provisions, right of set-off with the counterparty, the period of time remaining on the derivatives and the
pricing of recent terminations and amendments. Derivative liabilities was reduced by $100,463 at September 30, 2010 as a result of Ambac CVA adjustments to derivative contracts other than credit derivatives.

As described further below, certain valuation models also require inputs that are not readily observable in the market. The selection of
a model to value a derivative depends on the contractual terms



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



of, and specific risks inherent in the instrument as well as the availability of pricing information in the market. For derivatives that are less complex and trade in liquid markets or may be
valued primarily by reference to interest rates and yield curves that are observable and regularly quoted, such as interest rate and currency swaps, we utilize vendor-developed models. For derivatives that do not trade, or trade in less liquid
markets such as credit derivatives on collateralized debt obligations, a proprietary model is used because such instruments tend to be unique, contain complex or heavily modified and negotiated terms, and pricing information is not readily available
in the market. These models and the related assumptions are continuously re-evaluated by management and enhanced, as appropriate, based on improvements in modeling techniques. Ambac has not made significant changes to its modeling techniques for the
periods presented.

Credit Derivatives (CDS):

Fair value of Ambacs CDS is determined using internal valuation models and represents the net present value of the difference
between the fees Ambac originally charged for the credit protection and our estimate of what a financial guarantor of comparable credit worthiness would hypothetically charge to provide the same protection at the balance sheet date. Ambac competed
in the financial guarantee market, which differs from the credit markets where Ambac-insured obligations may trade. As a financial guarantor, Ambac assumes only credit risk; we do not assume other risks and costs inherent in direct ownership of the
underlying reference securities. Additionally, as a result of having the ability to influence our CDS counterparty in certain investor decisions, financial guarantors generally have the ability to actively remediate the credit, potentially reducing
the loss given a default. Financial guarantee contracts, including CDS, issued by Ambac and its competitors are typically priced to capture some portion of the spread that would be observed in the capital markets for the underlying (insured)
obligation, with minimum pricing constrained by objective estimates of expected loss and financial guarantor required rates of return. Such pricing was well established by historical financial guarantee fees relative to capital market spreads as
observed and executed in competitive markets, including in financial guarantee reinsurance and secondary market transactions. Because of this relationship and in the absence of severe credit deterioration, changes in the fair value of our credit
default swaps (both unrealized gains and losses) will generally be less than changes in the fair value of the underlying reference obligations.

Key variables used in our valuation of substantially all of our credit derivatives include the balance of unpaid notional, expected term, fair values of the underlying reference obligations, reference
obligation credit ratings, assumptions about current financial guarantee CDS fee levels relative to reference obligation spreads and the CVA applied against Ambac Assurance liabilities by market participants. Notional balances, expected remaining
term and reference obligation credit ratings are monitored and determined by Ambacs Surveillance Group. Fair values of the underlying reference obligations are obtained from broker quotes when available, or are derived from other market
indications such as new issuance spreads and quoted values for similar transactions. Implicit in the fair values we obtain on the underlying reference obligations are the markets assumptions about default probabilities, default timing,
correlation, recovery rates and collateral values.

Broker quotes on the reference obligations named in our CDS contracts
represent an input to determine the estimated fair value of the CDS contract. Broker quotes are indicative values for the reference obligation and generally do not represent a bid or doing-business quote for the reference instrument. Regulations
require that such quotes follow methodologies that are generally consistent with those used to value similar assets on the quote providers own books. Methodologies may differ among brokers but are understood to reflect observable trading
activity (when available) and modeling that relies on empirical data and reasonable assumptions. For certain CDS contracts referencing unsecuritized pools of assets, we will obtain counterparty quotes on the credit derivative itself. Such quotes are
adjusted to reflect Ambacs own credit risk when determining the fair value of credit derivative liabilities. Third



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



party reference obligation values or specific credit derivative quotes were used in the determination of CDS fair values related to transactions representing 87% of CDS gross par outstanding and
94% of the CDS derivative liability as of September 30, 2010.

When broker quotes for reference obligations are not
available, reference obligation prices used in the valuation model are estimated internally based on averages of the quoted prices for other transactions of the same bond type and Ambac rating as well as changes in published credit spreads for
securities with similar collateral and ratings characteristics. When price quotes of a similar bond type vary significantly or the number of similar transactions is small, as had been observed with CDO of ABS transactions, management will consider
additional factors, such as specific collateral composition and performance and contractual subordination, to identify similar transactions. Internally estimated prices for CDO of ABS used in the valuation model also consider the discounted
value of future cash flows of the reference obligations. Reference obligation prices derived internally as described above were used in the determination of CDS fair values related to transactions representing 13% of CDS gross par outstanding and 6%
of the CDS derivative liability as of September 30, 2010.

Ambacs CDS fair value calculations are adjusted for
increases in our estimates of expected loss on the reference obligations and observable changes in financial guarantee market pricing. If no adjustment is considered necessary, Ambac maintains the same percentage of the credit spread (over LIBOR)
demanded in the market for the reference obligation as existed at the inception of the CDS. Therefore, absent changes in expected loss on the reference obligations or financial guarantee CDS market pricing, the financial guarantee CDS fee used for a
particular contract in Ambacs fair value calculations represent a consistent percentage, period to period, of the credit spread determinable from the reference obligation value at the balance sheet date. This results in a CDS fair value
balance that fluctuates in proportion with the reference obligation value.

The amount of expected loss on a reference
obligation is a function of the probability that the obligation will default and severity of loss in the event of default. Ambacs CDS transactions were all originally underwritten with extremely low expected losses. Both the reference
obligation spreads and Ambacs CDS fees at the inception of these transactions reflect these low expected losses. When reference obligations experience credit deterioration, there is an increase in the probability of default on the obligation
and, therefore, an increase in expected loss. The effects of credit deterioration on financial guarantee CDS fees cannot be observed in the market through new transactions, secondary market transactions or by other means as there have been no such
transactions. Ambac reflects the effects of changes in expected loss on the fair value of its CDS contracts by increasing the percentage of the reference obligation spread (over LIBOR) which would be captured as a CDS fee (relative change ratio) at
the valuation date, resulting in a higher mark-to-market loss on our CDS relative to any price decline on the reference obligation. The fundamental assumption is that financial guarantee CDS fees will increase relative to reference obligation
spreads as the underlying credit quality of the reference obligation deteriorates and approaches payment default. For example, if the credit spread of an underlying reference obligation was 80 basis points at the inception of a transaction and Ambac
received a 20 basis point fee for issuing a CDS on that obligation, the relative change ratio, which represents the CDS fee to cash market spread Ambac would utilize in its valuation calculation, would be 25%. If the reference obligation
spread increased to 100 basis points in the current reporting period, absent any observable changes in financial guarantee CDS market pricing or credit deterioration, Ambacs current period CDS fee would be computed by multiplying the current
reference obligation spread of 100 basis points by the relative change ratio of 25%, resulting in a 25 basis point fee. Thus, the model indicates we would need to receive an additional 5 basis points (25 basis points currently less the 20 basis
points contractually received) for issuing a CDS in the current reporting period for this reference obligation. We would then discount the product of the notional amount of the CDS and the 5 basis point hypothetical CDS fee increase, over the
weighted average life of the reference obligation to compute the current period mark-to-market



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



loss. Using the same example, if the reference obligation spread increased to 100 basis points and there was credit deterioration as evidenced by an internal rating downgrade which increased the
relative change ratio from 25% to 35%, we would estimate a 15 basis point hypothetical CDS fee increase in our model (35% of 100 basis points reference obligation spread, or 35 basis points currently, less the 20 basis points contractually
received). Therefore, we would record a higher mark-to-market loss based on the computations described above absent any observable changes in financial guarantee CDS market pricing.

We do not adjust the relative change ratio until an actual internal rating downgrade has occurred unless we observe new pricing on
financial guarantee CDS contracts. However, because we have active surveillance procedures in place for our entire CDS portfolio, particularly for transactions at or near a below investment grade threshold, we believe it is unlikely that an internal
downgrade would lag the actual credit deterioration of a transaction for any meaningful time period. The factors used to increase the percentage of reference obligation spread captured in the CDS fee (or relative change ratio) are based on rating
agency probability of default percentages determined by management to be appropriate for the relevant bond type. That is, the probability of default associated with the respective tenor and internal rating of each CDS transaction is utilized in the
computation of the relative change ratio in our CDS valuation model. The new relative change ratio in the event of an internal downgrade of the reference obligation is calculated as the weighted average of: (i) a given transactions
inception relative change ratio and (ii) a ratio of 100%. The weight given to the inception relative change ratio is 100% minus the probability of default (i.e. the probability of non-default) and the weight given to using a 100% relative
change ratio is the probability of default. For example, assume a transaction having an inception relative change ratio of 33% is downgraded to B- during the period, at which time it has an estimated remaining life of 8 years. If the estimated
probability of default for an 8 year, B- rated credit of this type is 60% then the revised relative change ratio will be 73.2%. The revised relative change ratio can be calculated as 33% x (100%-60%) + 100% x 60% = 73.2%.

As noted above, reference obligation spreads incorporate market perceptions of default probability and loss severity, as well as
liquidity risk and other factors. Loss severities are generally correlated to default probabilities during periods of economic stress. By increasing the relative change ratio in our calculations proportionally to default probabilities, Ambac
incorporates into its CDS fair value the higher expected loss on the reference obligation (probability of default x loss severity), by increasing the portion of reference obligation spread that should be paid to the CDS provider.

Ambac incorporates its own credit risk into the valuation of its CDS liabilities by applying a CVA to the calculations described above.
Through March 31, 2010, the Ambac CVA was calculated by adjusting the discount rate used in the CDS present value calculations. Specifically, the discount rate used for the present value calculations described above was LIBOR plus Ambacs
credit spread as observed from quotes of the cost to purchase credit protection on Ambac Assurance. The widening of Ambacs own credit spread cannot result in our recognition of an asset on a CDS contract. Under our methodology, determination
of the CDS fair value requires estimating hypothetical financial guarantee CDS fees for a given credit at the valuation date and estimating the present value of those fees. Our approach begins with pricing in the risk of default of the
reference obligation using that obligations credit spread. The widening of the reference obligation spread results in a mark-to-market loss to Ambac, as the credit protection seller, and a gain to the credit protection buyer because the
cost of credit protection on the reference obligation (ignoring CDS counterparty credit risk) will be greater than the amount of the actual contractual CDS fees. To factor in the risk of Ambacs non-performance as viewed by the market,
through March 31, 2010 we adjusted the discount rate used to calculate the present value of hypothetical future CDS fees by adding the cost of credit default swap protection on Ambac Assurance to the LIBOR curve as of the valuation
date. By incorporating the market cost of credit protection on Ambac into the discount rate, the fair value of Ambacs liability (or the asset from the perspective of the credit protection buyer) will be decreased by an amount that
reflects the markets pricing of the risk that Ambac will not



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



have the ability to pay. Late in March 2010, Ambac Assurance credit default swap pricing became unobservable following ISDAs declaration of an event of default on such contracts.
Therefore the Ambac CVA at September 30, 2010 cannot utilize the same market inputs as had been used in past periods. Use of an Ambac credit adjusted discount rate for longer term transactions resulted in a higher CVA than for shorter term
transaction due to compounding. As of September 30, 2010, the Ambac CVA is a percentage applied to the estimated CDS liability fair value calculated as described above, but using only LIBOR in the present value calculations. At
September 30, 2010, the Ambac CVA is internally estimated using relevant data points, including the final settlement value of Ambac Assurance credit default swaps (determined through auction in June 2010) and quoted prices of securities
guaranteed by Ambac Assurance, which indicate the markets view of the recovery rate on Ambac Assurances insurance obligations. The estimated recovery rate of 20% results in an Ambac CVA of 80%. In instances where narrower reference
obligation spreads result in a CDS asset to Ambac, or when Ambac has a CDS asset arising from reinsured CDS exposure, those hypothetical future CDS fees are discounted at a rate which does not incorporate Ambacs own spread but rather
incorporates our counterpartys credit spread (i.e. the discount rate used to value purchased credit derivative protection is LIBOR plus the current credit spread of the protection provider).

In addition, when there are sufficient numbers of new observable transactions to indicate a general change in market pricing trends for
CDS on a given bond type, management will adjust its assumptions about the percentage of reference obligation spreads captured as CDS fees to match the current market. No such adjustments were made in the three or nine month periods ended
September 30, 2010 and 2009. Ambac is not transacting CDS business currently and other guarantors have stated they have exited this product. Although relevant new transactions are not occurring in the financial guarantee marketplace, we have
entered into negotiated settlements of CDS contracts, including CDS terminations in connection with the September 2010 Settlement Agreement as described in Note 1. These settlements have primarily related to our written CDS on CDO of ABS
transactions, all of which are terminated as of June 30, 2010. Because of the significant differences between the CDO of ABS transactions compared to the other CDS remaining in the portfolio, including the generally lower credit quality, we do
not believe the settlements of these transactions provide information that warrants adjustment to the fair value model of CDS as of September 30, 2010.

Key variables which impact the Realized gains and losses and other settlements component of Net change in fair value of credit derivatives in the Consolidated Statements of
Operations are the most readily observable variables since they are based solely on the CDS contractual terms and cash settlements. Those variables include (i) premiums received and accrued on written CDS contracts, (ii) premiums paid or
accrued on purchased contracts, (iii) losses paid and payable on written credit derivative contracts and (iv) paid losses recovered and recoverable on purchased credit derivative contracts for the appropriate accounting period. Losses paid
and payable and losses recovered and receivable reported in Realized gains and losses and other settlements include those arising after a credit event that requires a payment under the contract terms has occurred or in connection with a
negotiated termination of a contract. The remaining key variables described above impact the Unrealized gains (losses) component of Net change in fair value of credit derivatives. The net notional outstanding of Ambacs
CDS contracts is $20,372,641 and $43,276,321 at September 30, 2010 and December 31, 2009, respectively.



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Credit derivative
liabilities at September 30, 2010 had a combined fair value of $232,528 and related to underlying reference obligations that are classified as either CLOs or Other. Information about the above described model inputs used to determine the fair
value of each class of credit derivatives as of September 30, 2010 is summarized below:



|                                            |  |      |            |   |          |   |           |  
|------------------------------------------- |  | ---- | ---------- | - | -------- | - | --------- | -
|                                            |  | CLOs |            |   | Other(1) |  
|Notional outstanding                        |  | $    | 12,246,415 |   |          | $ | 5,914,524 |  
|Weighted average reference obligation price |  |      | 90.5       |   |          |   | 86.5      |  
|Weighted average life (WAL) in years        |  |      | 3.5        |   |          |   | 3.8       |  
|Weighted average credit rating              |  |      | AA-        |   |          |   | A+        |  
|Weighted average relative change ratio      |  |      | 34.4       | % |          |   | 32.6      | %
|CVA percentage                              |  |      | 80         | % |          |   | 80        | %
|Fair value of derivative liabilities        |  | $    | 81,110     |   |          | $ | 63,155    |  



|(1) | Excludes contracts for which fair values are based on credit derivative quotes rather than reference obligation quotes. Such contracts have a combined notional
outstanding of $2,211,702, WAL of 5.2 years and liability fair value of $88,263. Other inputs to the valuation of these transactions at September 30, 2010 include weighted average quotes of 20% of notional, weighted average rating of A+ and
Ambac CVA percentage of 80%.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Financial Guarantees:

Fair value of net financial guarantees written represents our estimate of the cost to Ambac to completely transfer its insurance
obligation to another financial guarantor of comparable credit worthiness. In theory, this amount should be the same amount that another financial guarantor of comparable credit worthiness would hypothetically charge in the market place, on a
present value basis, to provide the same protection as of the balance sheet date.

This fair value estimate of financial
guarantees is presented in the table immediately following the first paragraph of this Note 11 on a net basis and includes direct and assumed contracts written, which represent our liability, net of ceded reinsurance contracts, which represent our
asset. The fair value estimate of direct and assumed contracts written is based on the sum of the present values of (i) unearned premium reserves; and (ii) loss and loss expense reserves, including claims presented and not paid as a result
of the claim moratorium imposed by OCI on March 24, 2010. The fair value estimate of ceded reinsurance contracts is based on the sum of the present values of (i) deferred ceded premiums net of ceding commissions; and (ii) reinsurance
recoverables on paid and unpaid losses.

Under our current financial guarantee model, the key variables are par amounts
outstanding (including future periods for the calculation of future installment premiums), expected term, discount rate, and expected net loss and loss expense payments. Net par outstanding is monitored by Ambacs Surveillance Group. With
respect to the discount rate, ASC Topic 820 requires that the nonperformance risk of a financial liability be included in the estimation of fair value. This nonperformance risk would include considering Ambacs own credit risk in the fair value
of financial guarantees we have issued, thus the estimated fair value for direct contracts written was discounted at rate that reflects Ambacs credit risk. Refer to Note 5, Losses and Loss Expenses, for additional information on factors which
influence our estimate of loss and loss expenses. The estimated fair value of ceded reinsurance contracts factors in any adjustments related to the counterparty credit risk we have with reinsurers.

There are a number of factors that limit our ability to accurately estimate the fair value of our financial guarantees. The first
limitation is the lack of observable pricing data points as a result of the current disruption in the credit markets and recent rating agency actions, both of which have significantly limited the amount of new financial guarantee business written by
Ambac. Additionally, the fair value cost to completely transfer its obligation to another party of comparable credit worthiness. Finally, as a



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



result of the breadth, volume and geographic diversification of our financial guarantee exposures, we may need to enhance our model to more accurately incorporate other key variables that may
influence the fair value estimate. Variables which are not incorporated in our current fair value estimate of financial guarantees include the credit spreads of the underlying insured obligations, the underlying ratings of those insured obligations
and assumptions about current financial guarantee premium levels relative to the underlying insured obligations credit spreads.

Long-term Debt:

The fair value of debentures classified as long-term debt
is based on quoted market prices. The fair value of surplus notes issued by Ambac Assurance and classified as long-term debt is internally estimated considering numerous factors, including market transactions for other Ambac Assurance obligations,
discounted projected cash flows of Ambac Assurance and projected cash payments on the surplus notes discounted at a rate adjusted to reflect the markets view of Ambac Assurances credit quality.

Other Financial Assets and Liabilities:

The fair values of Ambacs equity interest in Ambac sponsored special purpose entities (included in Other assets), Loans and Obligations under investment, repurchase and payment agreements are
estimated based upon internal valuation models that discount expected cash flows using a discount rates consistent with the credit quality of the obligor after considering collateralization.

Variable Interest Entity Assets and Liabilities:

The assets and liabilities of VIEs consolidated under ASC Topic 810 consist primarily of fixed income securities, loans receivable, derivative instruments and debt instruments and are generally carried at
fair value. These consolidated VIEs are securitization entities which have liabilities and/or assets guaranteed by Ambac. The fair values of VIE debt instruments are determined using the same methodologies used to value Ambacs fixed income
securities in its investment portfolio as described above. VIE debt fair value is based on market prices received from dealer quotes or alternative pricing sources with reasonable levels of price transparency. Such quotes are considered Level 2 and
generally consider a variety of factors, including recent trades of the same and similar securities. For those VIE debt instruments where quotes were not available, the debt instrument fair values are considered Level 3 and are based on internal
discounted cash flow models. VIE debt instruments considered Level 3 include fixed rate, floating rate and zero coupon notes secured by various asset types, primarily European ABS and US student loans. Information about the valuation inputs for the
various VIE debt categories classified as Level 3 is as follows:

European ABS transactions: Fair values were calculated
by discounting contractual payments to maturity. The discount rates used were based on the rates implied from the third party quoted values (Level 2) for comparable notes from the same securitization. Significant inputs for the valuation at
September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 4.21%
| | -- | ------------------



| | b. | Maturity: 17.22 years
| | -- | ---------------------



| | c. | Discount rate: 6.25%
| | -- | --------------------

Student
Loans: Fair values were calculated by discounting contractual payments to maturity. The discount rates used were derived from generic spreads for similarly rated student loan backed securities, adjusted upward to incorporate the adverse effects
of illiquidity on the value of these auction rate securities. Significant inputs for the valuation at September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 3.60%
| | -- | ------------------



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| | --------------------------------------------



| | b. | Maturity: 32.82 years
| | -- | ---------------------



| | c. | Discount rate: 21.26%
| | -- | ---------------------

Other
classes: Other classes include European PFI, utilities, transportation and asset lease financing transactions. Fair values were calculated by discounting contractual payments to maturity. The discount rates used were derived from the third party
quoted values (Level 2) for comparable notes from the same securitization when available. When no quotes were received on notes in a given structure, rates were derived from generic spreads for similar securities. Significant inputs for the
valuation at September 30, 2010 include the following weighted averages:



| | a. | Coupon rate: 7.72%
| | -- | ------------------



| | b. | Maturity: 6.82 years
| | -- | --------------------



| | c. | Discount rate: 6.07%
| | -- | --------------------

VIE
derivative asset and liability fair values are determined using valuation models. When specific derivative contractual terms are available and may be valued primarily by reference to interest rates, exchange rates and yield curves that are
observable and regularly quoted the derivatives are valued using vendor-developed models. Other derivatives within the VIEs that include significant unobservable valuation inputs are valued using internally developed models. All VIE derivatives at
September 30, 2010 and December 31, 2009 use vendor-developed models and do not use significant unobservable inputs.

The fair value of VIE assets are obtained from market quotes when available. Typically the asset fair values are not readily available
from market quotes and are estimated internally. The consolidated VIEs are securitization entities in which net cash flows from assets and derivatives (after adjusting for financial guarantor cash flows and other expenses) will be paid out to note
holders or equity interests. Our valuation of VIE assets (fixed income securities or loans), therefore, are derived from the fair value of notes and derivatives, as described above, adjusted for the fair value of cash flows from Ambacs
financial guarantee. The fair value of financial guarantee cash flows include: (i) estimated future premiums discounted at a rate consistent with that implicit in the fair value of the VIEs liabilities and (ii) internal estimates of
future loss payments by Ambac discounted at a rate that includes Ambacs own credit risk. Estimated future premium payments to be paid by the VIEs were discounted at a weighted average rate of 6.6%. The value of future loss payments to be paid
by Ambac to the VIEs equals 20% of the loss reserve value computed for financial guarantee accounting under ASC Topic 944, with the 80% haircut reflecting the Ambac credit adjustment.

The following tables present the changes in the Level 3 fair value category for the three and nine months ended September 30, 2010
and 2009. Ambac classifies financial instruments in Level 3 of the fair value hierarchy when there is reliance on at least one significant unobservable input to the valuation model. In addition to these unobservable inputs, the valuation models for
Level 3 financial instruments typically also rely on a number of inputs that are readily observable either directly or indirectly. Thus, the gains and losses presented below include changes in the fair value related to both observable and
unobservable inputs.



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| | --------------------------------------------





Level- 3
financial assets and liabilities accounted for at fair value

Three Months ended September 30,
2010



|                                              |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  
|--------------------------------------------- |  | ----------- | ------- | - | ----------- | - | ------ | ----------- |  | - | -------------------------- | - |  | ----- | ---------- | - | ----------- | - | ---------- | ------------- |  | - | -------- | - |  | - | ---------- | - |  | - | ---------- | -
|                                              |  |             |         |   |             |   |        |             |  |   | VIE Assets and Liabilities |   |  |       |           
|                                              |  | Investments |         |   | OtherAssets |   |        | Derivatives |  |   | Investments                |   |  | Loans |            |   | Derivatives |   |            | Long-termdebt |  |   | Total    |  
|Balance, beginning of period                  |  | $           | 179,690 |   |             | $ | 20,511 |             |  | $ | (274,687                   | ) |  | $     | 1,801,557  |   |             | $ | 15,992,650 |               |  | $ | 4,546    |   |  | $ | (4,231,330 | ) |  | $ | 13,492,937 |  
|Additions of VIEs for ASC 2009-17             |  |             |        |   |             |   |       |             |  |   |                           |   |  |       |           |   |             |   |           |               |  |   |         |   |  |   |           |   |  |   |           |  
|Total gains/(losses) realized and unrealized: |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  
|Included in earnings                          |  |             | (47     | ) |             |   | (1,753 | )           |  |   | (65,509                    | ) |  |       | 43,859     |   |             |   | 517,243    |               |  |   | (184     | ) |  |   | 153,425    |   |  |   | 647,034    |  
|Included in other comprehensive income        |  |             | 1,168   |   |             |   |       |             |  |   |                           |   |  |       | 94,076     |   |             |   | 768,009    |               |  |   |         |   |  |   | (208,398   | ) |  |   | 654,855    |  
|Purchases, issuances and settlements          |  |             | (702    | ) |             |   |       |             |  |   | 20,441                     |   |  |       |           |   |             |   | (150,711   | )             |  |   |         |   |  |   | 47,703     |   |  |   | (83,269    | )
|Transfers in Level 3                          |  |             | 15,177  |   |             |   |       |             |  |   |                           |   |  |       |           |   |             |   |           |               |  |   |         |   |  |   |           |   |  |   | 15,177     |  
|Transfers out of Level 3                      |  |             |        |   |             |   |       |             |  |   |                           |   |  |       |           |   |             |   |           |               |  |   |         |   |  |   | 2,190,370  |   |  |   | 2,190,370  |  
|Deconsolidation of VIEs                       |  |             |        |   |             |   |       |             |  |   |                           |   |  |       |           |   |             |   | (119,543   | )             |  |   |         |   |  |   |           |   |  |   | (119,543   | )
|                                              |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  
|Balance, end of period                        |  | $           | 195,286 |   |             | $ | 18,758 |             |  | $ | (319,755                   | ) |  | $     | 1,939,492  |   |             | $ | 17,007,648 |               |  | $ | 4,362    |   |  | $ | (2,048,230 | ) |  | $ | 16,797,561 |  
|                                              |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  
|                                             
|Nine Months ended September 30, 2010          | 
|                                              |  |             |         |   |             |   |        |            
|Balance, beginning of period                  |  | $           | 189,600 |   |             | $ | 18,843 |             |  | $ | (2,998,447                 | ) |  | $     | 160,518    |   |             | $ | 2,428,352  |               |  | $ |         |   |  | $ | (388,003   | ) |  | $ | (589,137   | )
|Additions of VIEs for ASC 2009-17             |  |             |        |   |             |   |       |             |  |   |                           |   |  |       | 3,817,065  |   |             |   | 17,275,234 |               |  |   | (153,369 | ) |  |   | (6,699,121 | ) |  |   | 14,239,809 |  
|Total gains/(losses) realized and unrealized: |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  
|Included in earnings                          |  |             | (192    | ) |             |   | (85    | )           |  |   | (106,287                   | ) |  |       | 788,139    |   |             |   | 1,725,291  |               |  |   | (802     | ) |  |   | (1,403,129 | ) |  |   | 1,002,935  |  
|Included in other comprehensive income        |  |             | (6,668  | ) |             |   |       |             |  |   |                           |   |  |       | 7,308      |   |             |   | (347,291   | )             |  |   |         |   |  |   | 9,264      |   |  |   | (337,387   | )
|Purchases, issuances and settlements          |  |             | (2,631  | ) |             |   |       |             |  |   | 2,903,086                  |   |  |       |           |   |             |   | (726,817   | )             |  |   |         |   |  |   | 72,538     |   |  |   | 2,246,176  |  
|Transfers in Level 3                          |  |             | 15,177  |   |             |   |       |             |  |   | (118,107                   | ) |  |       |           |   |             |   |           |               |  |   |         |   |  |   | (588,083   | ) |  |   | (691,013   | )
|Transfers out of Level 3                      |  |             |        |   |             |   |       |             |  |   |                           |   |  |       |           |   |             |   |           |               |  |   |         |   |  |   | 2,757,245  |   |  |   | 2,757,245  |  
|Deconsolidation of VIEs                       |  |             |        |   |             |   |       |             |  |   |                           |   |  |       | (2,833,538 | ) |             |   | (3,347,121 | )             |  |   | 158,533  |   |  |   | 4,191,059  |   |  |   | (1,831,067 | )
|                                              |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  
|Balance, end of period                        |  | $           | 195,286 |   |             | $ | 18,758 |             |  | $ | (319,755                   | ) |  | $     | 1,939,492  |   |             | $ | 17,007,648 |               |  | $ | 4,362    |   |  | $ | (2,048,230 | ) |  | $ | 16,797,561 |  
|                                              |  |             |         |   |             |   |        |             |  |   |                            |   |  |       |            |   |             |   |            |               |  |   |          |   |  |   |            |   |  |   |            |  

Three Months ended September 30, 2009



|                                               |  |             |         |  |       |   |         |             |  |   |             |  |  |               |            |   |       |   |          |   |  |   |            |  
|---------------------------------------------- |  | ----------- | ------- |  | ----- | - | ------- | ----------- |  | - | ----------- |  |  | ------------- | ---------- | - | ----- | - | -------- | - |  | - | ---------- | -
|                                               |  | Investments |         |  | Loans |   |         | OtherAssets |  |   | Derivatives |  |  | Long-termDebt |            |   | Total |  
|Balance, beginning of period                   |  | $           | 243,598 |  |       | $ |        |             |  | $ | 13,387      |  |  | $             | (6,586,999 | ) |       | $ |         |   |  | $ | (6,330,014 | )
|Total gains/(losses)(realized and unrealized): |  |             |         |  |       |   |         |             |  |   |             |  |  |               |            |   |       |   |          |   |  |   |            |  
|Included in earnings                           |  |             | 31,533  |  |       |   |        |             |  |   | 408         |  |  |               | 2,147,146  |   |       |   |         |   |  |   | 2,179,087  |  
|Included in other comprehensive income         |  |             | 6,519   |  |       |   |        |             |  |   |            |  |  |               |           |   |       |   |         |   |  |   | 6,519      |  
|Purchases, issuances and settlements           |  |             |        |  |       |   |        |             |  |   |            |  |  |               | 711,770    |   |       |   |         |   |  |   | 711,770    |  
|Additions for consolidated VIEs                |  |             | 2,383   |  |       |   | 231,256 |             |  |   |            |  |  |               |           |   |       |   | (408,008 | ) |  |   | (174,369   | )
|Transfers in and/or out of Level 3             |  |             | 59,089  |  |       |   |        |             |  |   |            |  |  |               |           |   |       |   |         |   |  |   | (59,089    | )
|                                               |  |             |         |  |       |   |         |             |  |   |             |  |  |               |            |   |       |   |          |   |  |   |            |  
|Balance, end of period                         |  | $           | 343,122 |  |       | $ | 231,256 |             |  | $ | 13,795      |  |  | $             | (3,728,083 | ) |       | $ | (408,008 | ) |  | $ | (3,547,918 | )
|                                               |  |             |         |  |       |   |         |             |  |   |             |  |  |               |            |   |       |   |          |   |  |   |            |  



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



Nine Months ended September 30, 2009



|                                               |  |             |         |   |       |   |         |             |  |   |             |   |  |               |            |   |       |   |          |   |  |   |            |  
|---------------------------------------------- |  | ----------- | ------- | - | ----- | - | ------- | ----------- |  | - | ----------- | - |  | ------------- | ---------- | - | ----- | - | -------- | - |  | - | ---------- | -
|                                               |  | Investments |         |   | Loans |   |         | OtherAssets |  |   | Derivatives |   |  | Long-termDebt |            |   | Total |  
|Balance, beginning of period                   |  | $           | 83,453  |   |       | $ |        |             |  | $ | 14,290      |   |  | $             | (8,031,410 | ) |       | $ |         |   |  | $ | (7,933,667 | )
|Total gains/(losses)(realized and unrealized): |  |             |         |   |       |   |         |             |  |   |             |   |  |               |            |   |       |   |          |   |  |   |            |  
|Included in earnings                           |  |             | 31,664  |   |       |   | (1,793  | )           |  |   | (495        | ) |  |               | 3,638,080  |   |       |   | (13,668  | ) |  |   | 3,653,788  |  
|Included in other comprehensive income         |  |             | 17,714  |   |       |   |        |             |  |   |            |   |  |               |           |   |       |   |         |   |  |   | 17,714     |  
|Purchases, issuances and settlements           |  |             | (5,800  | ) |       |   |        |             |  |   |            |   |  |               | 665,247    |   |       |   |         |   |  |   | 659,447    |  
|Additions for consolidated VIEs                |  |             | 126,537 |   |       |   | 229,918 |             |  |   |            |   |  |               |           |   |       |   | (381,274 | ) |  |   | (24,819    | )
|Transfers in and/or out of Level 3             |  |             | 89,554  |   |       |   |        |             |  |   |            |   |  |               |           |   |       |   |         |   |  |   | 89,554     |  
|                                               |  |             |         |   |       |   |         |             |  |   |             |   |  |               |            |   |       |   |          |   |  |   |            |  
|Balance, end of period                         |  | $           | 343,122 |   |       | $ | 228,125 |             |  | $ | 13,795      |   |  | $             | (3,728,083 | ) |       | $ | (394,942 | ) |  | $ | (3,537,983 | )
|                                               |  |             |         |   |       |   |         |             |  |   |             |   |  |               |            |   |       |   |          |   |  |   |            |  

Invested assets and VIE long-term debt are transferred into Level 3 when internal valuation models that
include significant unobservable inputs are used to estimate fair value. All such securities that have internally modeled fair values have been classified as Level 3 as of September 30, 2010 and December 31, 2009. Derivative instruments
are transferred into Level 3 when the use of unobservable inputs become significant to the overall valuation. During the three and nine months ended September 30, 2010, transfers of derivatives to Level 3 related to adjustments for Ambacs
own credit risk. All transfers into and out of Level 3 represent transfers between Level 3 and Level 2. There were no transfers in or out of Level 1 for the periods presented. All Level 1, 2, and 3 transfers are recognized at the beginning of each
accounting period.



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





Gains and losses
(realized and unrealized) relating to Level 3 assets and liabilities included in earnings for the three and nine months ended September 30, 2010 and 2009 are reported as follows:



|                                                                                        |  |                     |        |   |                                                                            |   |            |                                                          |  |   |                            |   |  |                                                   |          |   |             |   |           |  |  |   |        |  
|--------------------------------------------------------------------------------------- |  | ------------------- | ------ | - | -------------------------------------------------------------------------- | - | ---------- | -------------------------------------------------------- |  | - | -------------------------- | - |  | ------------------------------------------------- | -------- | - | ----------- | - | --------- |  |  | - | ------ | -
|                                                                                        |  | Netinvestmentincome |        |   | Realized gainsor (losses) andothersettlements
oncredit derivativecontracts |   |            | Unrealizedgains or 
(losses)on creditderivativecontracts |  |   | Derivativeproductsrevenues |   |  | Income (loss)on variableinterest entityactivities |          |   | Otherincome |  
|Three Months ended Sept. 30, 2010                                                       |  |                     |        |   |                                                                            |   |            |                                                          |  |   |                            |   |  |                                                   |          |   |             |   |           |  |  |   |        |  
|                                                                                        |  |                     |        |   |                                                                            |  
|Total gains or losses included in earnings for the period                               |  | $                   | (47    | ) |                                                                            | $ | 4,862      |                                                          |  | $ | 4,550                      |   |  | $                                                 | (74,921  | ) |             | $ | 714,343   |  |  | $ | (1,753 | )
|Gains or losses relating to the assets and liabilities still held at the reporting date |  |                     | (47    | ) |                                                                            |   | 5,399      |                                                          |  |   | 7,363                      |   |  |                                                   | (73,799  | ) |             |   | 714,854   |  |  |   | (1,753 | )
|                                                                                        |  |                     |        |   |                                                                            |  
|Nine Months ended Sept. 30, 2010                                                        |  |                     |        |   |                                                                            |   |            |                                                          |  |   |                            |   |  |                                                   |          |   |             |   |           |  |  |   |        |  
|                                                                                        |  |                     |        |   |                                                                            |  
|Total gains or losses included in earnings for the period                               |  | $                   | (192   | ) |                                                                            | $ | (2,762,509 | )                                                        |  | $ | 2,806,963                  |   |  | $                                                 | (150,741 | ) |             | $ | 1,109,499 |  |  | $ | (85    | )
|Gains or losses relating to the assets and liabilities still held at the reporting date |  |                     | (192   | ) |                                                                            |   | 11,764     |                                                          |  |   | (465,609                   | ) |  |                                                   | (39,749  | ) |             |   | 1,547,838 |  |  |   | (85    | )
|                                                                                        |  |                     |        |   |                                                                            |  
|Three Months ended Sept. 30, 2009                                                       |  |                     |        |   |                                                                            |   |            |                                                          |  |   |                            |   |  |                                                   |          |   |             |   |           |  |  |   |        |  
|                                                                                        |  |                     |        |   |                                                                            |  
|Total gains or losses included in earnings for the period                               |  | $                   | 31,533 |   |                                                                            | $ | (732,857   | )                                                        |  | $ | 2,865,761                  |   |  | $                                                 | 14,242   |   |             | $ | 16,105    |  |  | $ | 408    |  
|Gains or losses relating to the assets and liabilities still held at the reporting date |  |                     | 31,533 |   |                                                                            |   | 11,346     |                                                          |  |   | 2,244,793                  |   |  |                                                   | 14,390   |   |             |   | 16,105    |  |  |   | 408    |  
|                                                                                        |  |                     |        |   |                                                                            |  
|Nine Months ended Sept. 30, 2009                                                        |  |                     |        |   |                                                                            |   |            |                                                          |  |   |                            |   |  |                                                   |          |   |             |   |           |  |  |   |        |  
|                                                                                        |  |                     |        |   |                                                                            |  
|Total gains or losses included in earnings for the period                               |  | $                   | 31,664 |   |                                                                            | $ | (712,012   | )                                                        |  | $ | 4,392,324                  |   |  | $                                                 | (42,232  | ) |             | $ | 16,105    |  |  | $ | (495   | )
|Gains or losses relating to the assets and liabilities still held at the reporting date |  |                     | 31,664 |   |                                                                            |   | 30,664     |                                                          |  |   | 3,618,646                  |   |  |                                                   | (26,902  | ) |             |   | 16,105    |  |  |   | (495   | )

(12) Commitments and Contingencies

Ambac Financial Group, Inc. (defined herein as Ambac or Ambac Financial Group) and certain of its
present or former officers or directors have been named in lawsuits that allege violations of the federal securities laws and/or state law. Various putative class action suits alleging violations of the federal securities laws have been filed
against the Company and certain of its present or former directors or officers. These suits include four class actions filed in January and February of 2008 in the United States District Court for the Southern District of New York that were
consolidated on May 9, 2008 under the caption In re Ambac Financial Group, Inc. Securities Litigation, Lead Case No. 08 CV 411. On July 25, 2008, another suit, Painting Industry Insurance and Annuity Funds v. Ambac Assurance
Corporation, et al., case No. 08 CV 6602, was filed in the United States District for the Southern District of New York. On or about August 22, 2008, a consolidated amended complaint was filed in the consolidated action. The
consolidated amended complaint includes the allegations presented by the original four class actions, the allegations presented by the Painting Industryaction, and additional allegations. The consolidated amended complaint purports to be
brought on behalf of purchasers of Ambacs common stock from October 25, 2006 to April 22, 2008, on behalf of purchasers of Ambacs DISCS, issued in February of 2007, and on behalf of purchasers of equity units and
common stock in Ambacs March 2008 offerings. The suit names as defendants the Company, the underwriters for the three offerings, the Companys independent Certified Public Accountants and certain present and former directors and officers
of the Company. The complaint alleges, among other things, that the defendants issued materially false and



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



misleading statements regarding Ambacs business and financial results and guarantees of CDO and MBS transactions and that the Registration Statements pursuant to which the three offerings
were made contained material misstatements and omissions in violation of the securities laws. On August 27, 2009, the Company and the individual defendants named in the consolidated securities action moved to dismiss the consolidated amended
complaint.On February 22, 2010, the Court dismissed the claims arising out of the March 2008 equity units and common stock offering (resulting in the dismissal of the Companys independent Certified Public Accountants from the
action), and otherwise denied the motions to dismiss. On April 15, 2010, the Court ordered a Discovery Plan and Proposed Pretrial Schedule, pursuant to which discovery was scheduled to commence on May 10, 2010, with dispositive motions due
by December 2, 2011. Separately, on December 14, 2009, a purchaser of Ambacs DISCS filed an individual action entitled Judy Ehrenreich v. Ambac Financial Group, Inc. et al., asserting alleged violations of the federal
securities laws, in the United States District Court for the Southern District of New York, against Ambac and one former officer, Case No. 09 CV 10173. The complaint alleges, among other things, that the defendants issued materially false and
misleading statements regarding Ambacs plans to meet certain investment agreement collateral requirements as well as materially false and misleading statements regarding Ambacs valuation of certain of its investment securities. On
March 9, 2010, the Company and the former officer moved to dismiss.

On December 24, 2008, a complaint in a putative
class action entitled Stanley Tolin et al. v. Ambac Financial Group, Inc. et al., asserting alleged violations of the federal securities laws was filed in the United States District Court for the Southern District of New York against Ambac,
one former officer and director and one former officer,Case No. 08 CV 11241. An amended complaint was subsequently filed on January 20, 2009. This action is brought on behalf of all purchasers of Structured Repackaged Asset-Backed
Trust Securities, Callable Class A Certificates, Series 2007-1, STRATS(SM) Trust for Ambac Financial Group, Inc. Securities 2007-1 (STRATS) from June 29, 2007 through April 22, 2008. The STRATS are asset-backed securities
that were allegedly issued by a subsidiary of Wachovia Corporation and are allegedly collateralized solely by Ambacs DISCS. The complaint alleges, among other things, that the defendants issued materially false and misleading statements
regarding Ambacs business and financial results and Ambacs guarantees of CDO and MBS transactions, in violation of the securities laws. On April 15, 2009, the Company and the individual defendants named in Tolin moved to
dismiss the amended complaint.On December 23, 2009, the Court initially denied defendants motion to dismiss, but later recalled that decision and requested further briefing from parties in the case before it rendered a decision on
the motion to dismiss. The additional briefing was completed on March 5, 2010, and oral argument on the motion to dismiss was heard on August 4, 2010.

Various shareholder derivative actions have been filed against certain present or former officers or directors of Ambac, and against Ambac as a nominal defendant. These suits, which are brought
purportedly on behalf of the Company, are in many ways similar and allege violations of law for conduct occurring between October 2005 and the dates of suit regarding, among other things, Ambacs guarantees of CDO and MBS transactions,
Ambacs public disclosures regarding such guarantees and Ambacs financial condition, and certain defendants alleged insider trading on non-public information. The suits include (i) three actions filed in the United States
District Court for the Southern District of New York that have been consolidated under the caption In re Ambac Financial Group, Inc. Derivative Litigation, Lead Case No. 08 CV 854; on June 30, 2008, plaintiffs filed a consolidated
and amended complaint that asserts violations of state and federal law, including breaches of fiduciary duties, waste of corporate assets, unjust enrichment and violations of the federal securities laws; on August 8, 2008, the Company and the
individual defendants named in the consolidated Southern District of New York derivative action moved to dismiss that action for want of demand and failure to state a claim upon which relief can be granted; on December 11, 2008, the court
granted plaintiffs motion for leave to amend the complaint and plaintiffs filed an amended complaint on December 17, 2008; on June 2, 2009 defendants moved to dismiss the amended complaint; (ii) two actions filed in the Delaware
Court of Chancery that have been



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------



consolidated under the caption In re Ambac Financial Group, Inc. Shareholders Derivative Litigation, Consolidated C.A. No. 3521; on May 7, 2008, plaintiffs filed a consolidated
and amended complaint that asserts claims including breaches of fiduciary duties, waste, reckless and gross mismanagement, and unjust enrichment; on December 30, 2008, the Delaware Court of Chancery granted defendants motion to stay the
Delaware shareholder derivative action in favor of the Southern District of New York Consolidated Derivative Action; plaintiffs in the Delaware action subsequently moved to intervene in the Southern District of New York derivative action and on
May 12, 2009, the motion to intervene was denied; and (iii) two actions filed in the Supreme Court of the State of New York, New York County, that have been consolidated under the caption In re Ambac Financial Group, Inc. Shareholder
Derivative Litigation, Consolidated Index No. 650050/2008E; on September 22, 2008, plaintiffs filed a consolidated and amended complaint that asserts claims including breaches of fiduciary duties, gross mismanagement, abuse of control,
and waste; on January 5, 2010, the New York Supreme Court granted defendants motion to stay the New York Supreme Court action in favor of the Southern District of New York Consolidated Derivative Action.

Karthikeyan V. Veera v. Ambac Financial Group, Inc. et al., (United States District Court for the Southern District of New York,
Case No. 10 CV 4191, filed on or about May 24, 2010, and amended on September 7, 2010). Plaintiff, a former employee and participant in the Companys Saving Incentive Plan (the Plan), asserts violations of the
Employee Retirement Income Security Act of 1974 (ERISA) and names as defendants the Plan Administrative Committee, the Plan Investment Committee, the Compensation Committee of the Board of Directors of the Company, and a number of
current and former officers of the Company. This action is purportedly brought on behalf of all persons, excluding defendants and their immediate families, who were participants in the Plan from October 1, 2006 through July 2, 2008
and whose Plan accounts included an investment in Ambac stock. The complaint alleges, among other things, breaches of fiduciary duties by defendants in respect of the continued offering of Ambac stock as an investment option for the Plan and
the failure to provide complete and accurate information to Plan participants regarding the Companys financial condition. This ERISA action seeks, among other things, compensatory damages and attorneys fees. On October 20,
2010, all of the defendants named in the amended complaint moved to dismiss all of the claims in the amended complaint.

County of Alameda et al. v. Ambac Financial Group, Inc. et al. (Superior Court of the State of California, County of San Francisco, filed
on or about October 13, 2010) (Alameda Complaint); Contra Costa County et al. v. Ambac Financial Group, Inc. et al. (Superior Court of the State of California, County of San Francisco, filed on or about October 13, 2010)
(Contra Costa Complaint); The Olympic v. Ambac Financial Group, Inc. et al. (Superior Court of the State of California, County of San Francisco, filed on or about October 13, 2010) (Olympic Club Complaint). The Contra
Costa Complaint is brought on behalf of five California municipal entities and the non-profit Jewish Community Center of San Francisco. The Alameda Complaint is brought on behalf of nineteen California municipal entities. The Olympic Club Complaint
is brought on behalf of the non-profit Olympic Club. The three actions make similar allegations against Ambac Financial Group and Ambac Assurance, various other financial guaranty insurance companies and employees thereof, and, in the case of the
Contra Costa Complaint and the Olympic Club Complaint, the major credit rating agencies. The actions allege that (1) Ambac and the other defendants colluded with the Rating Agencies to perpetuate a dual rating system pursuant to
which the Rating Agencies rated the debt obligations of municipal issuers differently from corporate debt obligations, thereby keeping municipal ratings artificially low relative to corporate ratings; (2) Ambac issued false and misleading
financial statements which failed to disclose the extent of the insurers respective exposures to mortgage backed securities and collateralized debt obligations; and (3) as a result of these actions, plaintiffs incurred higher interest
costs and bond insurance premiums in respect of their respective bond issues. Ambac and the other financial guaranty insurance companies filed a demurrer seeking the dismissal of each of these complaints on September 17, 2010. The plaintiffs
filed their opposition papers to the demurrer on October 22, 2010. The reply papers in support of the demurrer are due on November 19, 2010 with oral argument on the demurrer scheduled for December 14, 2010.



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| | (Dollars in thousands, except share amounts)
| | --------------------------------------------





City of New
Orleans v. Ambac Assurance Corporation, Ambac Financial Services, LLC, PaineWebber Capital Services, Inc. and UBS Securities LLC (United States District Court, Eastern District of Louisiana, Civil Action No. 08-3949). This action was brought by
the City of New Orleans (New Orleans) against Ambac Assurance and Ambac Financial Services on July 17, 2008 in connection with Ambac Assurances participation in a New Orleans bond issue. New Orleans issued variable rate demand
obligations (VRDOs), which were insured by Ambac Assurance, and entered into an interest rate swap agreement with PaineWebber, Inc. in order to synthetically fix its interest rate on the VRDOs. PaineWebber in turn entered
into an interest rate swap agreement with Ambac Financial Services with terms that mirrored those of the New Orleans/Paine Webber swap. On December 23, 2009, the City filed an Amended Complaint in which it seeks damages against Ambac Assurance
and Ambac Financial Services alleging the following causes of action: (1) breach of written agreement for credit enhancement; (2) breach of financial guarantee policy; (3) error in the principal cause; (4) fraud in the inducement
of contract; (5) negligent misrepresentation; (7) breach of policy/third-party beneficiary to policy agreement; (8) breach of the swap; (9) tortious interference with the swap; (10) tortious interference with remarketing
agreement; and (11) detrimental reliance. On October 14, 2010, the Court approved a motion to dismiss all claims against Ambac Assurance and Ambac Financial Services.

NPS LLC v. Ambac Assurance Corporation (United States District Court, District of Massachusetts, filed on July 8, 2008). This action
was brought by NPS LLC (NPS), the owner of Gillette Stadium, the home stadium of the New England Patriots, with respect to the termination of a financial guaranty insurance policy issued by Ambac Assurance with respect to auction rate
bonds issued by NPS in 2006. Due to well-documented disruption of the auction rate securities market, the interest rate on the bonds floated to high levels and NPS therefore refinanced the bonds in a fixed rate financing without Ambac
Assurances involvement. Pursuant to the insurance agreement between NPS and Ambac Assurance, NPS is obligated to pay a make whole premium to Ambac Assurance equal to the present value of the installment premiums that Ambac
Assurance would have earned through 2017 if the bonds had not been redeemed (approximately $2,700). NPS alleged that it is not liable to pay the make whole premium because Ambac Assurance misrepresented its financial condition at the
time the bonds were issued and that the alleged misrepresentations induced NPS to enter into the insurance agreement, thereby causing NPS to incur additional interest costs in connection with the bonds. NPS also alleged that Ambac Assurance was
liable to NPS for the additional interest costs incurred by NPS which resulted from the disruption of the auction rate securities market. On February 25, 2010, the court granted Ambac Assurances motion for summary judgment as to all of
NPSs claims and Ambac Assurances counterclaim for the make whole premium and interest and costs. The parties are awaiting a determination by the court of the amount of Ambac Assurances legal fees that NPS will be
required to pay. NPS has stated that it intends to appeal the grant of summary judgment in favor of Ambac Assurance.

City of
Phoenix v. Ambac Assurance Corporation et al. (United States District Court, District of Arizona, filed on or about March 11, 2010). The parties stipulated to substitute Ambac Assurance Corporation for Ambac Financial Group as a defendant on
July 30, 2010. Pursuant to the Courts Scheduling Order, discovery is scheduled to be completed by October 3, 2011, with dispositive motions due by November 1, 2011. This action is brought by the City of Phoenix against Ambac
Assurance and other financial guaranty insurance companies. The complaint alleges that the defendants sought to perpetuate the Rating Agencies dual rating system, and that the perpetuation of the dual rating system
enabled the defendants to unfairly discriminate against the City of Phoenix in the pricing of bond insurance premiums.



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Water Works Board
of the City of Birmingham v. Ambac Financial Group, Inc. and Ambac Assurance Corporation (United States District Court, Northern District of Alabama, Southern Division, filed on November 10, 2009). This action alleged breach of contract,
misrepresentation, deceit, suppression of truth and negligence. Plaintiff claims that, in connection with plaintiffs purchase of a debt service reserve fund surety bond from Ambac Assurance in March 2007 with respect to its bond issue, Ambac
Assurance misrepresented the stability of its AAA financial strength ratings and subsequently breached a covenant to maintain its AAA ratings, thereby causing loss to plaintiff when it was required to replace the Ambac
Assurance surety bond upon the downgrade of Ambac Assurances ratings. On April 1, 2010, the court granted defendants motion to dismiss all claims. The plaintiff has appealed the dismissal to the U.S. Court of Appeals for the
Eleventh Circuit.

Baylor College of Medicine v. Ambac Financial Group, Inc. and Ambac Assurance Corporation (United States
District Court, Southern District of Texas, Houston Division, filed on November 13, 2009). This action alleges breach of contract, violation of Texas insurance statute, negligent misrepresentation, fraud and fraudulent inducement. Plaintiff
claims that, in connection with plaintiffs purchase of a bond insurance policy with respect to its auction rate bond issue in November 2007, Ambac Assurance misrepresented its financial position and the stability of its AAA
financial strength ratings in both public and nonpublic disclosures thereby causing loss to plaintiff. On March 15, 2010, defendants filed a motion to dismiss all of the plaintiffs claims. Before the court decided defendants motion
to dismiss, plaintiff agreed to the dismissal of the entire action with prejudice, which occurred on October 14, 2010.

The Confederated Tribes of the Warm Springs Reservation of Oregon v. Ambac Assurance Corporation (United States District Court, District
of Oregon, Portland Division, filed on February 4, 2010). This action alleges breach of contract, tortious breach of the covenant of good faith and fair dealing, violations of Oregon securities and insurance statutes, and negligence. Plaintiff
claims that, in connection with plaintiffs purchase of a bond insurance policy with respect to its auction rate bond issue in October 2003, Ambac Assurance misrepresented the stability of its AAA financial strength ratings and
subsequently breached an implied covenant by underwriting residential mortgage-backed securities and collateralized debt obligations that ultimately led to the loss of the AAA financial strength ratings. Ambac Assurance has moved to
dismiss all of the plaintiffs claims and the motion has been fully briefed and argued and is awaiting decision. In the meantime, the plaintiff has filed a second amended complaint, which Ambac Assurance will also move to dismiss.

Ambac Assurance Corporation v. Adelanto Public Utility Authority (United States District Court, Southern District of New York, filed on
June 1, 2009). Ambac Assurance commenced this action to recover $4,524 from the defendant on account of Ambac Assurances payment under a swap termination surety bond. The defendant has counterclaimed (as amended on June 12, 2010),
alleging breach of contract, breach of the covenant of good faith and fair dealing, violations of California insurance statutes, fraud and promissory estoppel. Defendant claims that, in connection with defendants purchase of a bond insurance
policy with respect to its variable rate bond issue in September 2005, Ambac Assurance misrepresented the stability of its AAA financial strength ratings and subsequently breached an implied covenant by underwriting risky structured
obligations that ultimately led to the loss of the AAA ratings. Ambac Assurance has moved to dismiss all of the defendants counterclaims and that motion has been fully briefed.

Ambac Assurance has also received various regulatory inquiries and requests for information. These include a subpoena duces tecum and
interrogatories from the Securities Division of the Office of the Secretary of the Commonwealth of Massachusetts (the Secretary of Massachusetts), dated January 18, 2008, that seeks certain information and documents concerning
Massachusetts Public Issuer Bonds. Ambac Assurance has also received subpoenas from the Office of the Attorney General, State of Connecticut (the Connecticut Attorney General) with respect to the Connecticut
Attorney Generals



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investigation into municipal bond rating practices employed by the credit rating agencies. The focus of the investigation appears to be the disparity in ratings with respect to municipal and
corporate credits, respectively. Insofar as Ambac Assurance is concerned, the Connecticut Attorney General has sought information with respect to communications between the credit rating agencies and the financial guarantee insurance industry
(acting through the Association of Financial Guaranty Insurers, the industry trade association) in relation to proposals by the Rating Agencies to implement a corporate equivalency rating system with respect to municipal credits. Ambac
Assurance has also received a subpoena duces tecum and interrogatories from the Attorney General of California (the California Attorney General) dated December 15, 2008 related to the California Attorney Generals investigation
of credit rating agencies in the rating of municipal bonds issued by the State of California and its related issuers. The subpoena requests that Ambac Assurance produce a wide range of documents and information. Ambac has also received a subpoena
and interrogatories from the Attorney General of West Virginia (the WVAG), dated June 17, 2009, with respect to the WVAGs investigation of possible antitrust violations in connection with the use of swaps, guaranteed
investment contracts and other derivatives and investment vehicles related to municipal bonds issued by West Virginia governmental entities. The WVAG has sought, among other things, information and documents relating to any such swaps,
guaranteed investment contracts and other derivatives and investment vehicles sold by Ambac Assurance to a West Virginia governmental entity or for which Ambac Assurance submitted a bid or offer that was not the winning bid. Ambac Assurance has not
received any further requests from the Secretary of Massachusetts, the Connecticut Attorney General, the California Attorney General or the WVAG,

An insurance rehabilitation proceeding was commenced in the Wisconsin Circuit Court for Dane County on March 24, 2010 by the Commissioner of Insurance of the State of Wisconsin (the
Commissioner). The principal parties to this proceeding are the Commissioner and the Segregated Account, which was established with the permission of the Commissioner, pursuant to Wis. Stat. § 611.24(2), for certain policies
and liabilities placing AAC at risk. The factual basis alleged to underlie this proceeding is that court-supervised rehabilitation was required in order to avoid further deterioration of Ambac Assurances financial condition through the payment
of claims and other demands. The ultimate relief sought is a plan of rehabilitation that will reform and revitalize the Segregated Account.

On March 24, 2010, the court entered an order of rehabilitation for the Segregated Account, appointing the Commissioner as rehabilitator. Policies and other liabilities were allocated to the
Segregated Account if they had current or projected material impairments or contractual triggers creating a risk of default based upon Ambac Assurances financial condition or the existence of rehabilitation proceedings. The remainder of Ambac
Assurances business is not subject to rehabilitation. The Commissioner concluded that rehabilitation of the Segregated Account would preserve Ambac Assurances claims-paying resources, while avoiding the disruption and additional claims
that would likely result from a full rehabilitation of Ambac Assurance, as opposed to a rehabilitation limited to the Segregated Account.

Also on March 24, 2010, the court entered a temporary injunction order that, until further order of the court: (a) prevents the exercise of certain contractual ipso facto provisions;
(b) enjoins payment of claims or obligations without consent from the Commissioner or his authorized representatives; and (c) requires the continued payment of premiums. The court further ordered that any interested party could seek
modification or dissolution of the injunction, in whole or in part, by filing a written motion by June 22, 2010.

Various
third parties have filed motions or objections in the rehabilitation court and/or moved to intervene in the rehabilitation proceedings. These challenges can be divided into three groups.



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First, several
third parties sought to enjoin the consummation of a commutation transaction between the General Account and certain financial institutions that were counterparties to credit-default swaps wrapped by AAC (the CDS Settlement). Initial
challenges to the CDS Settlement were brought by: (a) a group composed of Aurelius Capital Management, LP, Fir Tree, Inc., King Street Capital, L.P., King Street Capital Master Fund Ltd., Monarch Alternative Capital LP, and Stonehill Capital
Management LLC and their respective managed funds (the RMBS Investors); and (b) certain beneficial holders of the Las Vegas Monorail Project Revenue Bonds (the LVM Bondholders). A number of other institutions, including
Bank of New York Mellon, U.S. Bank N.A., Deutsche Bank National Trust Co. and Deutsche Bank Trust Co. Americas, in their capacities as trustees of securitization trusts, as well as Federal Home Loan Mortgage Corp., joined these challenges to the CDS
Settlement, in whole or in part. On May 27, 2010, the court entered an order denying all challenges to the CDS Settlement, and the CDS Settlement was consummated on June 7, 2010. The RMBS Investors, the LVM Bondholders and Federal Home
Loan Mortgage Corp. are appealing from the courts May 27, 2010 order.

Second, a number of third parties have
objected to the creation and rehabilitation of the Segregated Account on constitutional, statutory and common law grounds. The first such challenge was filed by Wells Fargo Bank, N.A., in its capacity as trustee for the beneficial owners of the Las
Vegas Monorail Project Revenue bonds. The RMBS Investors filed similar challenges, which were denied in the May 27, 2010 order. The LVM Bondholders objected to the allocation of their policies to the Segregated Account. This motion and the
motion filed by Wells Fargo were denied in an order entered on July 16, 2010. On August 2, 2010, the LVM Bondholders filed a notice of appeal from this order.

Additional third parties have challenged the creation and rehabilitation of the Segregated Account and/or the allocation of their policies to the Segregated Account, including Deutsche Bank National Trust
Co., Deutsche Bank Trust Co. Americas and U.S. Bank National Association, all in their capacities as trustees for securitization trusts, as well as PNC Bank, N.A., as servicer of a securitization trust, and ALL Student Loan Corp., Lloyds TSB Bank
plc, Depfa Bank, plc, One State Street LLC, KnowledgeWorks Foundation and the Treasurer of the State of Ohio. The motion filed by PNC Bank was never briefed or decided, but the other challenges were rejected in an order filed on October 26,
2010. Several parties have sought to appeal from this order and additional appeals are expected.

Third, certain third parties
filed motions seeking dissolution or modification of the courts temporary injunction order on constitutional, statutory and common law grounds. These objectors include Bank of America, N.A., Bank of New York Mellon, Deutsche Bank National
Trust Co., Deutsche Bank Trust Co. Americas, U.S. Bank National Association, and Wells Fargo Bank, N.A., all in their capacities as trustees for securitization trusts, as well as PNC Bank, N.A., as servicer of a securitization trust, and
KnowledgeWorks Foundation, the Treasurer of the State of Ohio, Depfa Bank plc, and One State Street LLC. The motion filed by PNC Bank was never briefed or decided, but the other motions were denied in an order filed on October 26, 2010. Several
parties have sought to appeal from this order and additional appeals are expected.

On October 8, 2010, the Commissioner
filed a proposed Plan of Rehabilitation, Disclosure Statement, and other materials in support of his motion for confirmation of the proposed Plan of Rehabilitation. Objections to the Plan of Rehabilitation are due on November 8, 2010, and
responses to these objections were filed on November 12, 2010. Hearings regarding whether to approve, disapprove, or modify the Plan of Rehabilitation are scheduled to begin on November 15, 2010.

Ambac Assurances CDS portfolio experienced significant losses. The majority of these CDS contracts are on a pay as you
go basis, and we believe that they are properly characterized as notional principal contracts for U.S. federal income tax purposes. Generally, losses on notional principal contracts are ordinary losses. However, the federal income tax
treatment of credit default swaps is an unsettled area of the tax law. As such, it is possible that the Internal Revenue Service may decide that the pay as you go CDS contracts should be characterized as capital assets or that certain
payments made with respect to the CDS contracts should be characterized as capital losses. Recently, the Internal Revenue Service opened an examination into certain issues related to Ambac Assurances tax accounting methods with respect to such
CDS contracts and Ambac Assurances related characterization of such losses as ordinary losses. Although, as discussed above, Ambac Assurance believes these contracts are properly characterized as notional principal contracts, if the Internal
Revenue Service today were to successfully assert, as a result of its examination, that these contracts should be characterized as capital assets or as generating capital losses, Ambac Assurance would be subject to both a substantial reduction in
its net operating loss carryforwards and would suffer a material assessment for federal income taxes. On November 9, 2010, the Company and the IRS agreed to a stipulation on the record that provides that the IRS would give notice at least 5 business
days prior to taking any action against the Companys nondebtor subsidiaries in the consolidated tax group that would violate the State Court Injunction, whether or not in effect. The stipulation permits the status quo to be maintained from
November 9, 2010 until a hearing on the preliminary injunction that the Company plans to seek under Bankruptcy Code section 105(a) barring assessment and collection of the 2003 through 2008 tax refunds by the IRS against the Companys nondebtor
subsidiaries in the consolidated tax group. On the same date, Ambac filed and served a complaint against the IRS for a declaratory judgment relating to the tax refunds.

Ambac is involved from time to time in various routine legal proceedings, including proceedings related to litigation with present or former employees. Although Ambacs litigation with present or
former employees is routine and incidental to the conduct of its business, such litigation can result in large monetary awards when a civil jury is allowed to determine compensatory and/or punitive damages for, among other things, termination of
employment that is wrongful or in violation of implied contracts.



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In the ordinary
course of their businesses, certain of Ambacs subsidiaries assert claims in legal proceedings against third parties to recover losses already paid and/or mitigate future losses. The amounts recovered and/or losses avoided which may be result
from these proceedings is uncertain, although recoveries and/or losses avoided in any one or more of these proceedings during any quarter or fiscal year could be material to Ambacs results of operations in that quarter or fiscal year.

In connection with Ambacs efforts to seek redress for breaches of representations and warranties related to the
information provided by both the underwriters and the sponsors of various transactions and for failure to comply with the obligation by the sponsors to repurchase ineligible loans, it has filed the following
lawsuits. Ambac Assurance Corporation v. EMC Mortgage Corporation (United States District Court, Southern District of New York, filed on November 5, 2008). On July 28, 2010, Ambac made a motion to amend the complaint
to add allegations of fraudulent conduct on the part of EMCs affiliate Bear, Stearns & Co., Inc. (now known as J. P. Morgan Securities Inc.), (and certain individual defendants) in addition to the breach of contract and
indemnification and reimbursement claims against EMC filed in the original complaint. On August 5, 2010, defendants submitted a motion to seal the amended complaint. Ambac Assurance Corporation and the Segregated Account of Ambac
Assurance Corporation v. DLJ Mortgage Capital, Inc. and Credit Suisse Securities (USA) LLC (Supreme Court of the State of New York, County of New York, filed on January 12, 2010. Ambac has alleged breach of contract, fraudulent inducement,
breach of implied duty of good faith and fair dealing, indemnification, reimbursement and requested the repurchase of loans that breach representations and warranties as required under the contracts, as well as damages. Ambac Assurance
Corporation and The Segregated Account of Ambac Assurance Corporation v. Countrywide Home Loans, Inc., Countrywide Securities Corp., Countrywide Financial Corp (n.k.a. Bank of America Home Loans) and Bank of America Corp. (Supreme Court of the State
of New York, Country of New York, filed on September 28, 2010). Ambac has alleged breach of contract, fraudulent inducement, indemnification and reimbursement, breach of representations and warranties and has requested the repurchase of loans that
breach representations and warranties as required under the contracts as well as damages and has asserted a successor liability claim against Bank of America.

It is not possible to predict whether additional suits will be filed or whether additional inquiries or requests for information will be made, and it is also not possible to predict the outcome of
litigation, inquiries or requests for information. It is possible that there could be unfavorable outcomes in these or other proceedings. Legal accruals for certain litigation matters discussed above, and managements estimated range of loss
for such matters, are not material to the operating results or financial position of the Company. For all other litigation matters, management is unable to make a meaningful estimate of the amount or range of loss that could result from unfavorable
outcomes but, under some circumstances, adverse results in any such proceedings could be material to our business, operations, financial position, profitability or cash flows. The Company believes that it has substantial defenses to the claims
raised in these lawsuits and, to the extent that these actions proceed, the Company intends to defend itself vigorously; however, the Company is not able to predict the outcomes of these actions.

(13) Restricted Cash

Consolidated variable interest entity cash that we do not have the right to use for general corporate purposes is recorded as restricted
cash in our consolidated balance sheets. This cash is restricted to fund the obligations of the consolidated VIEs.

(14) Future
Application of Accounting Standards

In January 2010, the FASB issued ASU 2010-06, Fair value Measurements and
Disclosures (Topic 820): Improving Disclosures about Fair Value Measurements.ASU 2010-06 requires some new disclosures and clarifies existing disclosure requirements related to level of disaggregation for each class of assets and
liabilities; and inputs and valuation techniques for fair value measurements that fall in either Level 2 or Level 3.The new disclosures include a) separately the amounts of significant transfers in and out of Level 1 and Level 2 fair value
measurements and a description of the reasons for the transfers; and b) in the reconciliation for fair value measurements using significant unobservable inputs (Level 3),



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information about purchases, sales, issuances, and settlements presented separately on a gross basis. This ASU is effective for interim and annual reporting periods beginning after
December 15, 2009, except for the disclosures about purchases, sales, issuances, and settlements in the roll forward of activities in Level 3 fair value measurements. Those disclosures are effective for fiscal years beginning after
December 15, 2010, and for interim periods within those fiscal years. Ambac will adopt the disclosure related to the detailed Leve1 3 roll forward disclosures on January 1, 2011 and the remaining disclosure was adopted as of
January 1, 2010. Since this ASU requires only enhanced disclosures concerning fair value measurement, adoption of this ASU did not and will not have an effect on Ambacs financial statements.

In July 2010, the FASB issued ASU 2010-20, Receivables (Topic 310): Disclosures about the Credit Quality of Financing Receivables
and the Allowance for Credit Losses. The ASU applies to both public and nonpublic entities that hold financing receivables that are not measured at a) fair value with changes in fair value recognized in earnings or b) lower of cost or fair
value, or trade accounts receivables that have a contractual maturity of one year or less that arose from the sale of goods or services. The ASU will enhance disclosures that entities make about credit quality of financing receivables and the
allowance for credit losses. For public entities, the disclosures as of the end of a reporting period are effective for interim and annual reporting periods ending on or after December 15, 2010. The disclosures about activities that
occur during a reporting period are effective for interim and annual reporting periods beginning on or after December 15, 2010. Ambac will adopt the provisions related to period end disclosures as of December 31, 2010 and disclosures
about activities that occur during a reporting period in the quarter ending March 31, 2011. Since this ASU requires only enhanced disclosures concerning credit quality of financing receivables and allowance for credit losses, adoption of
this ASU will not have an effect on Ambacs financial statements.

In October 2010, the FASB issued ASU 2010-26,
Financial Services  Insurance (Topic 944): Accounting for Costs Associated with Acquiring or Renewing Insurance Contracts  a consensus of the FASB Emerging Issues Task Force. ASU 2010-26 modifies the types of costs incurred by
insurance entities that can be capitalized in the acquisition of new and renewal insurance contracts. ASU 2010-26 requires only incremental costs or costs directly related to the successful acquisition of new or renewal contracts to be capitalized
as a deferred acquisition cost. ASU 2010-26 is effective for interim and annual periods beginning after December 15, 2011 with either prospective or retrospective application permitted. Early adoption is permitted. Ambac will adopt ASU 2010-26
on January 1, 2012 on a prospective basis. Ambac is currently evaluating the implications of ASU 2010-26 on its financial statements.



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Cautionary Statement Pursuant to the Private Securities Litigation Reform Act of 1995

In this Quarterly Report, we have included statements that may constitute forward-looking statements within the meaning of the
safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as estimate, project, plan, believe, anticipate, intend, planned,
potential and similar expressions, or future or conditional verbs such as will, should, would, could, and may, or the negative of those expressions or verbs, identify
forward-looking statements. We caution readers that these statements are not guarantees of future performance. Forward-looking statements are not historical facts but instead represent only our beliefs regarding future events, which, may by their
nature be inherently uncertain and some of which may be outside our control. These statements may relate to plans and objectives with respect to the future, among other things which may change. We are alerting you to the possibility that our actual
results may differ, possibly materially, from the expected objectives or anticipated results that may be suggested, expressed or implied by these forward-looking statements. Important factors that could cause our results to differ, possibly
materially, from those indicated in the forward-looking statements include, among others, those discussed under Risk Factors in Part I, Item 1A of the 2009 Annual Report on Form 10-K and Part II, Item 1A of this Form 10-Q.

Any or all of managements forward-looking statements here or in other publications may turn out to be incorrect and are
based on Ambac managements current belief or opinions. Ambacs actual results may vary materially, and there are no guarantees about the performance of Ambacs securities. Among events, risks, uncertainties or factors that could
cause actual results to differ materially are: (1) the impact of the bankruptcy proceeding on the holders of Ambac securities; (2) the unlikely ability of Ambac Assurance to pay dividends to Ambac in the near term; (3) the risk that
holders of debt securities or counterparties on credit default swaps or other similar agreements bring claims alleging that the rehabilitation of the Segregated Account constitutes an event of default under the applicable debt indenture or an event
of default under the applicable ISDA contract; (4) adverse events arising from the Segregated Account Rehabilitation Proceedings, including the injunctions issued by the Wisconsin rehabilitation court to enjoin certain adverse actions related
to the Segregated Account being successfully challenged as not enforceable; (5) litigation arising from the Segregated Account Rehabilitation Proceedings; (6) decisions made by the rehabilitator for the benefit of policyholders may result
in material adverse consequences for Ambacs securityholders; (7) potential of rehabilitation proceedings against Ambac Assurance, with resulting adverse impacts; (8) the risk that reinsurers may dispute amounts owed us under our
reinsurance agreements; (9) the risk that market risks impact assets in our investment portfolio or the value of our assets posted as collateral in respect of investment agreements and interest rate swap and currency swap transactions;
(10) risks which impact assets in Ambac Assurances investment portfolio; (11) risks relating to determination of amount of impairments taken on investments; (12) credit and liquidity risks due to unscheduled and unanticipated
withdrawals on investment agreements; (13) market spreads and pricing on insured collateralized loan obligations (CLOs) and other derivative products insured or issued by Ambac; (14) inadequacy of reserves established for
losses and loss expenses, including our inability to realize the remediation recoveries included in our reserves; (15) Ambacs financial position and the Segregated Account Rehabilitation Proceedings may prompt departures of key employees;
(16) the risk of litigation and regulatory inquiries or investigations, and the risk of adverse outcomes in connection therewith, which could have a material adverse effect on our business, operations, financial position, profitability or cash
flows; (17) difficult economic conditions, which may not improve in the near future, and adverse changes in the economic, credit, foreign currency or interest rate environment in the United States and abroad; (18) the actions of the U. S.
Government, Federal Reserve and other government and regulatory bodies to stabilize the financial markets; (19) likely unavailability of adequate capital support and liquidity; (20) credit risk throughout our business, including credit
risk related to residential mortgage-backed securities and CLOs and large single exposures to reinsurers; (21) default by one or more of Ambac Assurances portfolio investments, insured issuers,



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counterparties or reinsurers; (22) the risk that our risk management policies and practices do not anticipate certain risks and/or the magnitude of potential for loss as a result of
unforeseen risks; (23) factors that may influence the amount of installment premiums paid to Ambac, including the imposition of the payment moratorium with respect to claims payments as a result of Segregated Account Rehabilitation Proceedings;
(24) changes in prevailing interest rates; (25) the risk of volatility in income and earnings, including volatility due to the application of fair value accounting, required under the relevant derivative accounting guidance, to the portion
of our credit enhancement business which is executed in credit derivative form, and due to the adoption of the new financial guarantee insurance accounting standard effective January 1, 2009, which, among other things, introduces volatility in
the recognition of premium earnings and losses; (26) changes in accounting principles or practices that may impact Ambacs reported financial results; (27) legislative and regulatory developments; (28) operational risks,
including with respect to internal processes, risk models, systems and employees; (29) changes in tax laws and other tax-related risks; (30) other factors described in the Risk Factors section in Part I, Item 1A of Ambacs Annual
Report on Form 10-K for the fiscal year ended December 31, 2009 and also disclosed from time to time by Ambac in its subsequent reports on Form 10-Q and Form 8-K, which are available on the Ambac website at www.ambac.com and at the SECs
website, www.sec.gov; and (31) other risks and uncertainties that have not been identified at this time. Readers are cautioned that forward-looking statements speak only as of the date they are made and that Ambac does not undertake to update
forward-looking statements to reflect circumstances or events that arise after the date the statements are made. You are therefore advised to consult any further disclosures we make on related subjects in Ambacs reports to the SEC.

Overview

Ambac Financial Group, Inc., headquartered in New York City, is a holding company whose affiliates provided financial guarantees and
financial services to clients in both the public and private sectors around the world. Ambac filed for a voluntary petition for relief under Chapter 11 of the United States Bankruptcy Code (Bankruptcy Code) in the United States
Bankruptcy Court for the Southern District of New York (Bankruptcy Court). The Company will continue to operate in the ordinary course of business as debtor-in-possession under the jurisdiction of the Bankruptcy Court and in
accordance with the applicable provisions of the Bankruptcy Code and the orders of the Bankruptcy Court. Ambacs activities are divided into two business segments: (i) Financial Guarantee and (ii) Financial Services.

Ambac provided financial guarantee insurance for public and structured finance obligations through its principal operating subsidiary,
Ambac Assurance Corporation (Ambac Assurance). Ambac Assurances financial strength ratings were downgraded during 2008, 2009 and 2010. As a result, Ambac Assurance currently has a Caa2 financial strength rating on review for
possible upgrade from Moodys and is rated R (Regulatory Intervention) from S&P. As a result of these rating agency actions, as well as investor concern with respect to these actions, Ambac Assurance has not written a meaningful volume of
financial guarantee business since November 2007 and no new business since mid-2008. As such, Ambacs principal business consists of mitigating losses in Ambac Assurances insured portfolio and maximizing the yield on its investment
portfolio. Refer to Note 1 of the Unaudited Consolidated Financial Statements in this Form 10-Q Recent Developments for discussion of the establishment of a Segregated Account of Ambac Assurance and the subsequent rehabilitation
proceedings of the Segregated Account by the OCI.

Through its financial services subsidiaries, Ambac historically provided
financial and investment products including investment agreements, funding conduits, interest rate, currency and total return swaps, principally to its clients of the financial guarantee business. In 2009, all total return swaps were terminated and
settled. The Companys existing investment agreement and derivative product portfolios are in active runoff. In the course of managing the inherent risks of these portfolios during runoff, the Financial Services segment may enter into new
financial instrument transactions for hedging purposes to



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the extent we are able to do so. The ratings and financial condition of Ambac Assurance, which acts as credit support provider with respect to these subsidiaries, will make execution of any such
hedging transactions more difficult.

Financial information concerning our business segments for each of 2010 and 2009 is set
forth in the unaudited consolidated financial statements and the notes, Managements Discussion and Analysis of Financial Condition and Results of Operations, and Quantitative and Qualitative Disclosures About Market
Risk, which are in Part 1, 2, and 3 of this Quarterly Report on Form 10-Q. Our Internet address is www.ambac.com. We make available free of charge, on or through the investor relations section of our web site, annual reports on Form 10-K,
quarterly reports on Form 10-Q and current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as well as proxy statements, as soon as reasonably
practicable after we electronically file such material with, or furnish it to, the U.S. Securities and Exchange Commission. Our Investor Relations Department can be contacted at Ambac Financial Group, Inc., One State Street Plaza, New York, New York
10004, Attn: Investor Relations, telephone: 212-208-3222.

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations is based upon our unaudited consolidated Financial
Statements, which have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). The preparation of these financial statements requires us to make estimates and judgments that affect the reported amount of
assets and liabilities, revenues and expenses and related disclosure of contingent assets and liabilities at the date of our financial statements. Actual results may differ from these estimates under different assumptions or conditions.

Critical accounting policies are considered critical because they place significant importance on management to make difficult, complex
or subjective estimates regarding matters that are inherently uncertain. Financial results could be materially different if alternative methodologies were used or if management modified its assumptions or estimates. Management has identified the
accounting for loss and loss expenses of non-derivative financial guarantees, the valuation of financial instruments, including the determination of whether an impairment is other-than-temporary and the valuation allowance on deferred tax assets, as
critical accounting policies. This discussion should be read in conjunction with the unaudited consolidated financial statements and notes thereon included elsewhere in this report, and in the 2009 Form 10-K filed with the SEC on April 9, 2010,
Form 10-Q for the quarterly period ended March 31, 2010 filed with the SEC on May 17, 2010, and Form 10-Q for the quarterly period ended June 30, 2010 filed with the SEC on August 9, 2010. We have discussed with the Audit and
Risk Assessment Committee managements assessment of such critical accounting policies, the reasons why they are considered critical, and how current and anticipated future events impact those determinations. The Companys critical
accounting policies and estimates are as follows:

Financial Guarantee Insurance Losses and Loss Expenses.The
loss and loss expense reserves for financial guarantee insurance discussed herein relates only to Ambacs non-derivative insurance business for insurance policies issued to beneficiaries, including VIEs, for which we do not consolidate the VIE.
Losses and loss expenses are based upon estimates of the ultimate aggregate losses inherent in the non-derivative financial guarantee portfolio as of the reporting date. The evaluation process for determining the level of reserves is subject to
certain estimates and judgments.

ASC Topic 944, Financial Services - Insuranceclarifies how existing guidance applies
to financial guarantee insurance contracts issued by insurance enterprises, including the recognition and measurement of claim liabilities (i.e., loss reserves). Ambac adopted the loss reserve provisions of ASC Topic 944 on January 1, 2009. ASC
Topic 944 is required to be applied to inforce financial guarantee insurance contracts issued upon adoption as well as new financial guarantee contracts issued in the future.



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Under ASC Topic
944, a loss reserve is recorded on the balance sheet for the excess of: (a) the present value of expected net cash outflows to be paid under an insurance contract, (i.e., the expected loss), over (b) the unearned premium reserve
(UPR) for that contract. To the extent (a) is less than (b), no loss reserve is recorded. Changes to the loss reserve estimate in subsequent periods are recorded as a loss and loss expense on the income statement. Expected losses
are based upon estimates of the ultimate aggregate losses inherent in the non-derivative financial guarantee portfolio as of the reporting date. The evaluation process for determining expected losses is subject to certain estimates and judgments
based on our assumptions regarding the probability of default and expected severity of performing credits as well as our active surveillance of the insured book of business and observation of deterioration in the obligors credit standing.

Ambacs loss reserves are based on managements on-going review of the non-derivative financial guarantee credit
portfolio. Active surveillance of the insured portfolio enables Ambacs surveillance group to track credit migration of insured obligations from period to period and update internal credit ratings for each transaction. Non-adversely classified
credits are assigned a Class I or Survey List (SL) risk classification, while adversely classified credits are assigned a risk classification of Class IA through Class V. The criteria for an exposure to be assigned an adversely
classified credit includes the deterioration of an issuers financial condition, underperformance of the underlying collateral (for collateral dependent transactions such as mortgage-backed securitizations), poor performance by the servicer of
the underlying collateral and other adverse economic events or trends. The servicer of the underlying collateral of an insured securitization transaction is a consideration in assessing credit quality because the servicers performance can
directly impact the performance of the related issue. For example, a servicer of a mortgage-backed securitization that does not remain current in its collection and loss mitigation efforts could cause an increase in the delinquency and potential
default of the underlying obligation. Similarly, loss severities increase when a servicer does not effectively handle loss mitigation activities such as (i) the advancing of delinquent principal and interest and of default related expenses
which are deemed to be recoverable by the servicer, (ii) pursuit of loan charge-offs which maximize cash flows from the mortgage loan pool, and (iii) foreclosure and real estate owned disposition strategies and timelines.

The population of credits evaluated in Ambacs loss reserve process are (i) all adversely classified credits (Class IA through
V) and (ii) non-adversely classified credits (Class I and SL) which have been downgraded since the transactions inception. One of two approaches are then utilized to estimate expected losses to ultimately determine if a loss reserve
should be established. The first approach is a statistical expected loss approach, which considers the likelihood of all possible outcomes. The base case statistical expected loss is the product of: (i) the net par outstanding on
the credit; (ii) internally developed historical default information (taking into consideration internal ratings and average life of an obligation); (iii) internally developed loss severities; and (iv) a discount factor. The loss
severities and default information are based on rating agency information, are specific to each bond type and were established and approved by Ambacs senior management. For certain credit exposures, Ambacs additional monitoring and loss
remediation efforts may provide information relevant to adjust this estimate of base case statistical expected losses. As such, the loss severities used in estimating the base case statistical expected losses may be adjusted
based on the professional judgment of the surveillance analyst monitoring the credit with the approval of senior management. Analysts may accept the base case statistical expected loss as the best estimate of expected loss or assign
multiple probability weighted severities to determine an adjusted statistical expected loss that better reflects a given transactions potential severity.

The second approach entails the use of more precise estimates of expected net cash outflows (future claim payments, net of potential recoveries, expected to be paid to the holder of the insured financial



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obligation). Ambacs surveillance group will consider the likelihood of all possible outcomes and develop cash flow scenarios. This approach can include the utilization of market accepted
software tools to develop net claim payment estimates. We have utilized such tools for residential mortgage-backed exposures as well as certain other types of exposures. These tools, in conjunction with detailed data of the historical performance of
the collateral pools, assist Ambac in the determination of certain assumptions, such as default and voluntary prepayment rates, which are needed in order to estimate expected future net claim payments. In this approach a probability-weighted
expected loss estimate is developed based on assigning probabilities to multiple net claim payment scenarios and applying an appropriate discount factor. A loss reserve is recorded for the excess, if any, of estimated expected losses (net cash
outflows) using either of these two approaches, over UPR. For certain policies, estimated potential recoveries exceed estimated future claim payments because all or a portion of such recoveries relate to claims previously paid. The expected net cash
inflows for these policies are recorded as a subrogation recoverable asset.

The discount factor applied to both of the above
described approaches is based on a risk-free discount rate corresponding to the remaining expected weighted-average life of the exposure and the exposure currency. For example, U.S. dollar exposures are discounted using U.S. Treasury rates while
exposures denominated in foreign currency are discounted using the appropriate risk-free rate for the respective currency. The discount factor is updated for the current risk-free rate each reporting period.

Loss expenses are established for anticipated expenses associated with loss mitigation strategies, such as legal and consulting costs for
credits which may or may not have an associated loss reserve. Ambac establishes loss expense reserves based on our estimate of expected net cash outflows flows for loss expenses.

As the probability of default for an individual credit increases and/or the severity of loss given a default increases, our loss reserve
for that insured obligation will also increase. Political, economic, credit or other unforeseen events could have an adverse impact on default probabilities and loss severities. Loss reserves for public finance or other non-collateral dependent
transactions whose underlying financial obligations have already defaulted (that is a 100% probability of default) are only sensitive to severity assumptions. Loss reserves for collateral dependent transactions (such as mortgage-backed security
transactions) for which only a portion of the underlying collateral has already defaulted will be sensitive to both severity assumptions as well as probability of default of the underlying collateral.

Loss reserve volatility will be a direct result of the credit performance of our insured portfolio, including the number, size, bond
types and quality of credits included in our loss reserves. The number and severity of credits included in our loss reserves depend to a large extent on transaction specific attributes, but will generally increase during periods of economic stress
and decline during periods of economic stability. Reinsurance recoveries do not have a significant effect on loss reserve volatility because Ambac has little exposure ceded to reinsurers. The current stressed credit environment has had an adverse
impact on the financial strength of the reinsurers used by Ambac. Please refer to Item 3 Quantitative and Qualitative Disclosures About Market Risk  Credit Risk for further information and discussion.



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Ambac has exposure
to various bond types issued in the debt capital markets. Our experience has shown that, for the majority of bond types, we have not experienced claims and, therefore, the estimate of loss severity has remained constant. However, for certain bond
types Ambac has loss experience that indicates that factors or events could have a material impact on the original estimate of loss severity. Historically, we have observed that, with respect to three problematic bond types in particular, it is
reasonably possible that a material change in actual loss severities and defaults could occur over time. In the future, including as a result of the current credit market crisis, our experience may differ with respect to the types of guaranteed
bonds affected or the magnitude of the effect. The three bond types are residential mortgage-backed securities (RMBS), collateralized debt obligations (CDOs) and student loan securities. These three bond types represent 88%
of our ever-to-date claim payments (84% of which relates to RMBS).

The table below indicates the number of credits and net
par outstanding for loss reserves (excluding loss expenses) on credits which have defaulted and all other credits for which loss reserves have been established at September 30, 2010:



|                |  |                  |     |  |                    |   |        |                  |  |   |       |    
|--------------- |  | ---------------- | --- |  | ------------------ | - | ------ | ---------------- |  | - | ----- | ---
|($ in millions) |  | Number ofcredits |     |  | Net paroutstanding |   |        | Net LossReserves | 
|RMBS            |  |                  | 153 |  |                    | $ | 18,807 |                  |  | $ | 2,746 |    
|Student Loans   |  |                  | 111 |  |                    |   | 10,544 |                  |  |   | 480   |    
|Other           |  |                  | 64  |  |                    |   | 5,163  |                  |  |   | 810   |    
|                |  |                  |     |  |                    |   |        |                  |  |   |       |    
|Totals          |  |                  | 328 |  |                    | $ | 34,514 |                  |  | $ | 4,036 | (1)
|                |  |                  |     |  |                    |   |        |                  |  |   |       |    



|(1) | Loss reserves of $4,036 is included in the balance sheet in the following line items: Loss and loss expense reserve - $5,397; Subrogation recoverable - $1,222;
Reinsurance recoverable on paid and unpaid losses - $123; and Other assets - $16.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

RMBS:

Ambac insures RMBS transactions that contain first-lien mortgages. Ambac classifies its insured first-lien RMBS exposure principally into
two broad credit risk classes: Alt-A (including mid-prime, interest only, and negative amortization) and sub-prime. Alt-A loans are typically made to borrowers who have stronger credit histories and can demonstrate a capacity to repay their loans;
sub-prime loans are typically made to borrowers who are perceived as deficient with regard to credit history or ability to repay these loans. Compared with Alt-A loans, sub-prime loans typically have higher loan-to-value ratios, reflecting the
greater difficulty that sub-prime borrowers have in making down payments and the propensity of these borrowers to extract equity during refinancing. The Alt-A category includes loans backed by borrowers who typically do not meet standard agency
guidelines for documentation requirement, property type or loan-to-value ratio. These are typically higher-balance loans made to individuals who might have past credit problems that are not severe enough to warrant sub-prime
classification, or borrowers who chose not to obtain a prime mortgage due to documentation requirements.

Ambac has also
insured RMBS transactions that contain predominantly second-lien mortgage loans such as closed end seconds and home equity lines of credit. A second-lien mortgage loan is a type of loan in which the borrower uses the equity in their home as
collateral and the second-lien loan is subordinate to the first-lien loan outstanding on the home. The borrower is obligated to make monthly payments on both their first and second-lien loans. If the borrower defaults on the payments due under these
loans and the property is subsequently liquidated, the liquidation proceeds are first allocated to pay off the first-lien loan (as well as costs due the servicer) and any remaining funds are applied to pay off the second-lien loan. As a result of
this subordinate position to the first-lien loan, second-lien loans carry a significantly higher severity in the event of a loss, which has been at or above 100% in the current housing market.



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RMBS
transaction-specific behavior is analyzed on a risk-priority basis. We employ a screening tool to identify the first loss constant default rate (CDR) that would result in a claim to Ambacs policy, as well as other adverse credit
data that may result in deterioration. A higher first loss CDR, for example, indicates a transaction can sustain higher default rates in the underlying collateral pool before resulting in a claim to Ambacs policy versus a comparable
transaction with a lower first loss CDR. Transactions that demonstrate a declining first loss CDR or are experiencing escalating delinquencies and increasing loss severities are identified as underperforming. For underperforming transactions,
historical collateral performance is obtained and future collateral performance and cash flows are projected and evaluated. These underperforming transactions are then included in an adversely classified credit list and assigned a credit
classification consistent with the degree of underperformance.

The table below indicates the number of credits, gross par
outstanding, gross loss reserves before subrogation, subrogation, and gross reserves net of subrogation for those RMBS exposures for which Ambac established reserves at September 30, 2010:



|                                  |  |                 |     |  |                     |   |        |                                                 |  |   |                       |  |  |                                                 |        |   |  |   |       |  
|--------------------------------- |  | --------------- | --- |  | ------------------- | - | ------ | ----------------------------------------------- |  | - | --------------------- |  |  | ----------------------------------------------- | ------ | - |  | - | ----- | -
|($ in millions)                   |  | Numberofcredits |     |  | Grossparoutstanding |   |        | Gross claimliabilitybeforesubrogationrecoveries |  |   | Subrogationrecoveries |  |  | Gross claimliability aftersubrogationrecoveries |       
|Second-lien                       |  |                 | 32  |  |                     | $ | 4,263  |                                                 |  | $ | 841                   |  |  | $                                               |       |   |  | $ | 841   |  
|Mid-prime                         |  |                 | 63  |  |                     |   | 5,952  |                                                 |  |   | 1,653                 |  |  |                                                 |       |   |  |   | 1,653 |  
|Sub-prime                         |  |                 | 19  |  |                     |   | 985    |                                                 |  |   | 11                    |  |  |                                                 |       |   |  |   | 11    |  
|Other                             |  |                 | 12  |  |                     |   | 504    |                                                 |  |   | 137                   |  |  |                                                 |       |   |  |   | 137   |  
|                                  |  |                 |     |  |                     |   |        |                                                 |  |   |                       |  |  |                                                 |        |   |  |   |       |  
|Total Credits Without Subrogation |  |                 | 126 |  |                     |   | 11,704 |                                                 |  |   | 2,642                 |  |  |                                                 |       |   |  |   | 2,642 |  
|                                  |  |                 |     |  |                     |   |        |                                                 |  |   |                       |  |  |                                                 |        |   |  |   |       |  
|Second-lien                       |  |                 | 19  |  |                     |   | 4,547  |                                                 |  |   | 2,077                 |  |  | ($                                              | 1,939  | ) |  |   | 138   |  
|Mid-prime                         |  |                 | 4   |  |                     |   | 810    |                                                 |  |   | 157                   |  |  |                                                 | (219   | ) |  |   | (62   | )
|Sub-prime                         |  |                 | 4   |  |                     |   | 1,963  |                                                 |  |   | 312                   |  |  |                                                 | (263   | ) |  |   | 49    |  
|Other                             |  |                 |    |  |                     |   |       |                                                 |  |   |                      |  |  |                                                 |       |   |  |   |      |  
|                                  |  |                 |     |  |                     |   |        |                                                 |  |   |                       |  |  |                                                 |        |   |  |   |       |  
|Total Credits With Subrogation    |  |                 | 27  |  |                     |   | 7,320  |                                                 |  |   | 2,546                 |  |  |                                                 | (2,421 | ) |  |   | 125   |  
|                                  |  |                 |     |  |                     |   |        |                                                 |  |   |                       |  |  |                                                 |        |   |  |   |       |  
|Total                             |  |                 | 153 |  |                     | $ | 19,024 |                                                 |  | $ | 5,188                 |  |  | $                                               | (2,421 | ) |  | $ | 2,767 |  
|                                  |  |                 |     |  |                     |   |        |                                                 |  |   |                       |  |  |                                                 |        |   |  |   |       |  

Second-Lien:

In evaluating our portfolio of insured second-lien transactions we use a roll-rate methodology which observes trends in delinquencies, defaults, loss severities and prepayments and extrapolates ultimate
performance from this data on an individual transaction basis (and their component pools where they exist). As more information (performance and other) accumulates for each underperforming transaction we are able to update assumptions in
this model to reflect these changes. By employing the roll-rate methodology, we examined the historical rate at which delinquent loans in each transaction rolled into later delinquency categories (i.e. 30-59 days, 60-89 days, 90+ days). This
historical rate is adjusted each period to reflect current performance. We determined a pool specific current-to-30-to-59



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day delinquency curve and applied a statistical regression technique to historical roll rates. We carried forward the non-performing mortgages through the delinquency pipeline
through the 60-89 and 90+ delinquency categories all the way through to charge-off. We use this data to project a default curve for the life of the transaction. Listed below are specific inputs we used for third quarter 2010 loss estimates:

Prepayment Rates:

We have noted that voluntary prepayments have declined far below expected levels. The primary drivers of the trend include negative Housing Price Appreciation (HPA), an impaired mortgage
market, and borrowers inability to prepay balances. In our opinion, these factors will not be ameliorated in the foreseeable future and thus we generally project recent trends into the future. This translates into projected prepayment rates in
the 2% to 5% range.

Loss Severity:

We project loss severities to between 100% and 106% as we expect complete write-offs in this asset class exacerbated by carrying costs. One ongoing development with regard to several second-lien
transactions is that the current unwillingness of mortgage insurers to pay claims under their contracts on bonds insured by Ambac has caused increased claim payments.

First-Lien:

Ambac utilizes a third-party multi-scenario stochastic
(Monte Carlo) cash flow model to estimate first-lien product loss reserves. The model projects multiple scenarios at the individual mortgage loan level using various inputs, including:



| | i. | Home price projections at the Core Based Statistical Area (CBSA) level. Home price projections were obtained from an independent third party;
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------



| | ii. | An interest rate tool to generate term interest rate scenarios;
| | --- | ---------------------------------------------------------------



| | iii. | An unemployment module to project unemployment rates at the state level;
| | ---- | ------------------------------------------------------------------------



| | iv. | A discrete loan-level credit module to estimate the probability of monthly loan level credit performance through time across eight possible status states (current, 30
day delinquent, 60 day delinquent, 90 + day delinquent, foreclosure, REO, prepay, and default); and
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | v. | A severity module which pairs with the credit module and, on the basis of loan level information, generates a Loss Given Default severity time line.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------

The pool of mortgage loans backing each securitization are selected from a proprietary loan-level database and
the loss and prepayment scenarios across all loans are used to generate aggregated future cash-inflows. The cash-flow model embeds all the priority of payments and cash-diversion structures documented in the contracts which define the liability
payment obligations of the security being analyzed. We take the average of 300 claim cash-flow scenarios and discount it, as appropriate, to estimate the gross claim liability.

Government programs:

In May of 2009, the Federal Government initiated the Home Affordable Modification Plan (HAMP) which allows servicers to modify loans. After determining a borrowers eligibility, a servicer can take a
series of steps to adjust the monthly mortgage payment to 31% of a borrowers total pretax



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monthly income by first, reducing the interest rate to as low as 2%, next, if necessary, extending the loan term to 40 years. Finally, if necessary, forbear (defer) a portion of the principal
until the loan is paid off and waive interest on the deferred amount.

HAMP is applicable to the Ambac-wrapped transactions
serviced by the 47 servicers that have signed servicer participation agreements to modify loans under HAMP. Based on the current activity of trial plan HAMP offers extended and started, together with the latest indications from government published
sources, the first-lien model assumed 1% of HAMP-eligible loans will be modified monthly for 24 months for Ambac portfolios serviced by HAMP participating servicers. This estimate was reduced in the third quarter of 2010 from 2% of HAMP-eligible
loans assumed in previous periods as management believes that HAMP modifications are on the decline.

Servicer
Intervention:

The model also reflects the steps Ambac is taking to address shortcomings in servicing performance including
transferring servicers where the legal right exists to do so. Ambac expects to initiate, with the cooperation of the Rehabilitator of the Segregated Account of Ambac Assurance, additional programs with servicers that will provide for loan
modifications (principal forgiveness), improved liquidation timelines, short sales, and selected rate reductions. Ambac believes these are the principal factors that will result in reduced losses over time. In 2010, we are projecting that only
exposures that have already transferred servicing or entered into special servicing agreements will benefit from the effects of servicer intervention strategies.

Representation and Warranty Breaches by RMBS Transaction Sponsors:

In an effort to better understand the unprecedented levels of delinquencies, Ambac engaged consultants with significant mortgage lending
experience to review the underwriting documentation for mortgage loans underlying certain insured RMBS transactions. Transactions which have exhibited exceptionally poor performance were chosen for further examination of the underwriting
documentation supporting the underlying loans. Factors which Ambac believes to be indicative of poor performance include (i) increased levels of early payment defaults, (ii) significant number of loan liquidations or charge-offs and
resulting high level of losses, and (iii) rapid elimination of credit protections inherent in the transactions structures. With respect to item (ii), loan liquidations refers to loans for which the servicer has liquidated the
related collateral and the securitization has realized losses on the loan; charge-offs refers to loans which have been written off as uncollectible by the servicer, thereby generating no recoveries to the securitization, and may also
refer to the unrecovered balance of liquidated loans. In either case, the servicer has taken such actions as it has deemed viable to recover against the collateral, and the securitization has incurred losses to the extent such actions did not fully
repay the borrowers obligations. Generally, the sponsor of the transaction provides representations and warranties with respect to the securitized loans including the loan characteristics, the absence of fraud or other misconduct in the
origination process, including those attesting to the compliance of home loans with the prevailing underwriting policies. Per the transaction documents, the sponsor of the transaction is contractually obligated to repurchase, cure or substitute any
loan that breaches the representations and warranties.

Subsequent to the forensic exercise of examining loan files to
ascertain whether the loans conformed to the representations and warranties, we submit nonconforming loans to the sponsor for repurchase. To effect a repurchase, depending on the transaction, the sponsor is obligated to repurchase the loan at
(a) for loans which have not been liquidated or charged off, either (i) the current unpaid principal balance of the loan, (ii) the current unpaid principal balance plus accrued unpaid interest, or (iii) the current unpaid
principal balance plus accrued interest plus unreimbursed servicer advances/expenses and/or trustee expenses resulting from the breach of representations and warranties that trigger the



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repurchase, and (b) for a loan that has already been liquidated or charged-off, (iv) the amount of the realized loss (which in certain cases excludes accrued unpaid interest).
Notwithstanding the material breaches of representations and warranties, up until the establishment of the Segregated Account and the associated Segregated Account Rehabilitation Proceedings, Ambac had continued to pay claims submitted under the
financial guarantee insurance policies related to these securitizations and will, once again, pay claims in accordance with the Rehabilitation Plan after the plan has been approved in court. In cases where loans are repurchased by a sponsor, the
effect is typically to offset current period losses and then to increase the over-collateralization of the securitization, depending on the extent of loan repurchases and the structure of the securitization. Specifically, the repurchase price is
paid by the sponsor to the securitization trust which holds the loan. The cash becomes an asset of the trust, replacing the loan that was repurchased by the sponsor. On a monthly basis the cash received related to loan repurchases by the sponsor is
aggregated with cash collections from the underlying mortgages and applied in accordance with the trust indenture payment waterfall. This payment waterfall typically includes principal and interest payments to the note holders, various expenses of
the trust and reimbursements to Ambac, as financial guarantor, for claim payments made in previous months. With respect to transactions for which Ambac has recorded estimated subrogation recoveries (as further described below), Ambac insures all or
a portion of the senior tranches in the capital structure of the issuer, thus any sponsor cash received from loan repurchases would entirely benefit Ambac or Ambac insured note holders. Notwithstanding the reimbursement of previous monthly claim
payments, to the extent there continues to be insufficient cash in the waterfall in the current month to make scheduled principal and interest payments to the note holders, Ambac is required to make additional claim payments to cover the shortfall.

Ambacs estimate of subrogation recoveries includes two components: (1) estimated dollar amounts of loans with
material breaches of representations and warranties based on an extrapolation of the breach rate identified in a random sample of loans taken from the entire population of loans in a securitization (random sample approach); and
(2) dollar amount of actual loans with identified material breaches of representations and warranties discovered from samples of impaired loans in a securitization (adverse sample approach). We do not include estimates of damages in
our estimate of subrogation recoveries under either approach. The amount the sponsors believe to be their liability for these breaches is not known; however, certain sponsors have disclosed that reserves have been established related to claims by
financial guarantors and others for breaches of representations and warranties.

The random sample approach
to estimate subrogation recoveries was based on obtaining a statistically valid random sample for all the original loans in the pool. First, a breach rate was computed by dividing (i) the loans identified in sample as having
breached representations and warranties by (ii) the total sample size. Second, an extrapolation to the entire loan pool was performed by multiplying the breach rate by the sum of (a) the current unpaid loan pool balance (CULPB)
plus (b) realized losses resulting from loan liquidations or charge-offs to date, to compute an estimated repurchase obligation. The CULPB includes principal only on non-charged-off and non-liquidated loans, and the realized losses include
principal, interest and unreimbursed servicer advances and/or trustee expenses on charged-off and liquidated loans. As a result, the CULPB and realized loss components, which are used in extrapolating the estimated repurchase obligation, do not
precisely correspond to each sponsors contractual repurchase obligation as defined in the transaction documents. Nonetheless, the CULPB and realized loss components are provided through trustee reports we receive in the normal course of our
surveillance of these transactions and is the best information we have available to estimate the sponsors repurchase obligation under the random sample approach. Third, a realization factor (which incorporates Ambacs views about the
uncertainties surrounding the litigation process and/or settlement negotiation) was then applied to the estimated repurchase obligation to compute the undiscounted subrogation recovery. The realization factor was developed from a range of
realization factors using Ambacs own assumptions about the likelihood of outcomes based on all the information available to it including (i) discussions with external legal counsel and their views on ultimate settlement, (ii) recent
experience with



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loan put back negotiations where the existence of a material breach was debated and negotiated at the loan level, and (iii) the pervasiveness of the breach rates. Finally, a discount factor
was applied (using the assumptions discussed in the paragraph subsequent to the next table below) to the undiscounted subrogation recovery to compute the estimated subrogation recovery.

Due to the nature of the sampling methodology used, the subrogation recovery estimate Ambac has recorded based on the above-described
random sample approach includes all breached loans which Ambac believes the sponsor is contractually required to repurchase, including extrapolation to a loan pool which includes loans which have not defaulted, and, in fact, may not default in the
future (i.e. performing loans). In theory, a loan that continues to perform in accordance with its terms through repayment should have little or no effect on Ambacs anticipated claim payments, regardless of whether or not the sponsor
repurchases the loan. In other words, since there will be sufficient cash flows to service the notes in either situation (i.e. whether cash is received from a sponsor loan repurchase or whether cash is received from the underlying performing loan),
there should be no claim payment under Ambacs insurance policy in respect of such loans. Nonetheless, Ambac may have recorded a subrogation recovery for certain performing loans because it believes the breaches of representations and
warranties are so pervasive that a court would deem it impractical to have the sponsor re-underwrite every loan in a given transaction and repurchase only individual loans that have breached. Rather, Ambac believes there is precedent for the
utilization of a statistical sampling and extrapolation methodology across a population to prove liability and damages where it would be impractical to make a determination on an individual loan basis. Ambac believes a court would likely award
damages based on a reasonable methodology, such as our random sample approach, which damages would be either remitted directly to Ambac, placed in the securitization trust, or otherwise held under an arrangement for the benefit of the securitization
trust; however, Ambac believes that under such an approach individual loans would not be repurchased from the trust. In either case, Ambac believes those damages would compensate Ambac for past and future claim payments. Consequently, since the
sponsor is contractually obligated to repurchase those loans which breach representations and warranties regardless of whether they are current or defaulted, Ambac believes the appropriate measure in estimating subrogation recoveries is to apply the
breach rate to both performing and defaulted loans.

The adverse sample approach to estimate subrogation recoveries was based
on a sample taken from those loans in the pool that were impaired, meaning loans greater than 90 days past due, charged-off, in foreclosure, REO or bankruptcy. The estimated subrogation recovery under this approach represents 100% of the original
principal balance of those specific loans identified as having not met the underwriting criteria or otherwise breaching representations and warranties (i.e. the adverse loans), multiplied by a discount factor using the same assumptions used for the
discount factor in the random sample approach. For transactions subject to the adverse sample approach, given Ambacs limitations in developing a statistically valid random sample and its belief that the subrogation estimate under this approach
is inherently conservative (for reasons discussed below), Ambac did not attempt to develop probability-weighted alternative cash flow scenarios as it believes such results would not be meaningful. The three primary differences between this adverse
sample approach and the random sample approach, discussed in the previous paragraph, are as follows:



| | (i) | There is no extrapolation to the CULPB and realized losses under the adverse sample approach. At September 30, 2010, the adverse sample approach continues to be
used for 15 transactions that are with the same sponsor, who has limited our access to the underlying loan files and, therefore, a statistically valid random sample from the entire loan pool cannot be selected. This is in contrast to the
transactions subject to the random sample approach where Ambacs access to individual loan files has not been limited and the Company, therefore, has been able to develop a statistically valid representative sample.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | (ii) | The adverse sample approach is only based on the original principal balance rather than the principal balance at the time of default and liquidation or charge-off.
Furthermore, it does not include other components of the sponsors contractual repurchase obligation where the sponsor is also obligated to repay accrued interest, servicer advances and/or trustee expenses. The adverse sample approach relies on
individual loan level data where all of the components of the sponsors buyback obligation have not been specifically provided by the sponsor nor is easily estimable. For example, home equity lines of credit (HELOCs) are revolving loans whose
principal balances may be higher or lower at the time of default and liquidation or charge-off than at the time of origination. However, given the limited information available to Ambac in estimating such principal balances at the time of
liquidation or charge-off, the original principal balance must be used in calculating subrogation recoveries. Another example is closed-end second lien RMBS where the interest due on a particular loan will be a function of the length of time of
delinquency prior to liquidation or charge-off, and cannot be readily estimated. Incremental costs, including fees and servicer advances for such items as property taxes and maintenance, are likewise not readily estimated.
| | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | Unlike the random sample approach, for the adverse sample approach Ambac did not apply a realization factor to the estimated repurchase obligation for the adverse loans
related to uncertainties surrounding settlement negotiation or litigation processes given that the adverse loans selected represent only approximately 35% of the value of the impaired population of loans, only approximately 4% of the value of the
original loans in the pool, and the breach rate in the sample was pervasive. In other words, because the adverse loans selected represent only a fraction of the population of impaired loans and a very small proportion of the original loans in the
pools, Ambac believes there is an ample population of additional impaired loans where breaches of representations and warranties exist that could potentially replace any adverse loans it already identified that might be successfully challenged in
negotiations or litigation.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Ambac has updated its estimated subrogation recoveries from $2,046.8 million
($2,026.3 million, net of reinsurance) at December 31, 2009 to $2,421.3 million ($2,395.5 million, net of reinsurance) at September 30, 2010. The balance of subrogation recoveries and the related claim liabilities at September 30,
2010 and December 31, 2009 are as follows:



|                |  |                    |    |     |                                                 |   |         |                          |  |   |                                                 |   |  |   |        |  
|--------------- |  | ------------------ | -- | --- | ----------------------------------------------- | - | ------- | ------------------------ |  | - | ----------------------------------------------- | - |  | - | ------ | -
|($ in millions) |  | September 30, 2010 |   
|Method          |  | Count              |    |     | Gross claimliabilitybeforesubrogationrecoveries |   |         | Subrogationrecoveries(1) |  |   | Gross claimliability aftersubrogationrecoveries |  
|Adverse samples |  |                    | 15 | (2) |                                                 | $ | 1,587.7 |                          |  | $ | (708.5                                          | ) |  | $ | 879.2  |  
|Random samples  |  |                    | 12 | (3) |                                                 |   | 958.2   |                          |  |   | (1,712.8                                        | ) |  |   | (754.6 | )
|                |  |                    |    |     |                                                 |   |         |                          |  |   |                                                 |   |  |   |        |  
|Totals          |  |                    | 27 |     |                                                 | $ | 2,545.9 |                          |  | $ | (2,421.3                                        | ) |  | $ | 124.6  |  
|                |  |                    |    |     |                                                 |   |         |                          |  |   |                                                 |   |  |   |        |  
|                | 
|($ in millions) |  | December 31, 2009  |   
|Method          |  | Count              |    |     | Gross claimliabilitybeforesubrogationrecoveries |   |         | Subrogationrecoveries(1) |  |   | Gross claimliability aftersubrogationrecoveries |  
|Adverse samples |  |                    | 10 |     |                                                 | $ | 759.4   |                          |  | $ | (460.6                                          | ) |  | $ | 298.8  |  
|Random samples  |  |                    | 9  |     |                                                 |   | 937.3   |                          |  |   | (1,586.2                                        | ) |  |   | (648.9 | )
|                |  |                    |    |     |                                                 |   |         |                          |  |   |                                                 |   |  |   |        |  
|Totals          |  |                    | 19 |     |                                                 | $ | 1,696.7 |                          |  | $ | (2,046.8                                        | ) |  | $ | (350.1 | )
|                |  |                    |    |     |                                                 |   |         |                          |  |   |                                                 |   |  |   |        |  



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|(1) | The amount of recorded subrogation recoveries related to each securitization is limited to ever-to-date paid losses plus the present value of projected future paid
losses for each policy. To the extent significant losses have been paid but not yet recovered, the recorded amount of subrogation recoveries may exceed the projected future paid losses for a given policy. The net cash inflow for these policies is
recorded as a Subrogation recoverable asset. For those transactions where the subrogation recovery is less than projected future paid losses, the net cash outflow for these policies is recorded as a Loss and loss expense
reserve liability. Of the $2,421.3 million of subrogation recoveries recorded at September 30, 2010, $1,742.1 million was included in Subrogation recoverable and $679.2 million was included in Loss and loss expense
reserves.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Of these 15 transactions, 10 contractually require the sponsor to repurchase loans at the unpaid principal balance and 5 contractually require the sponsor to repurchase
loans at unpaid principal plus accrued interest. However, for reasons discussed above in the description of the adverse sample approach, our estimated subrogation recovery for these transactions may not include all the components of the
sponsors contractual repurchase obligation.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Of these 12 transactions, 3 contractually require the sponsor to repurchase loans at unpaid principal plus accrued interest and 9 contractually require the sponsor to
repurchase loans at unpaid principal plus accrued interest plus servicer advances/expense and/or trustee expenses. However, for reasons discussed above in the description of the random sample approach, our estimated subrogation recovery for these
transactions may not include all the components of the sponsors contractual repurchase obligation.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

While
the obligation by sponsors to repurchase loans with material breaches is clear, generally the sponsors have not yet honored those obligations. Ambacs approach to resolving these disputes has included negotiating with individual sponsors at the
transaction level and in some cases at the individual loan level and has resulted in the repurchase of some loans. Ambac has utilized the results of the above described loan file examinations to make demands for loan repurchases from sponsors or
their successors and, in certain instances, as a part of the basis for litigation filings. Ambac has initiated and will continue to initiate lawsuits seeking compliance with the repurchase obligations in the securitization documents. Ambac estimates
that it will take approximately three years from the initiation of litigation with the sponsor to ultimate resolution. Based on this estimate as a basis for projecting the future subrogation cash flows, Ambac assumes, on average, approximately three
and a half years to collect recoveries, discounted at a risk-free rate of 1.8%. Estimated recoveries will continue to be revised and supplemented as the scrutiny of the mortgage loan pools progresses.

We have performed the above-mentioned, detailed examinations on a variety of second-lien transactions and five first-lien transactions
that have experienced exceptionally poor performance. However, the loan file examinations and related estimated recoveries we have reviewed and recorded to date have been limited to only those transactions whose sponsors (or their successors) are
subsidiaries of large financial institutions, all of which carry an investment grade rating from at least one nationally recognized rating agency. A total of seven sponsors represent the 27 transactions which have been reviewed as of
September 30, 2010. While our contractual recourse is generally to the sponsor/subsidiary, rather than to the financial institutional parent, each of these financial institutions has significant financial resources and an ongoing interest in
mortgage finance, and we therefore believe that the financial institution/parent would not seek to disclaim financial responsibility for these obligations if the sponsor/subsidiary is unable to honor its contractual obligations or pay a judgment
that we may obtain in litigation. Additionally, in the case of successor institutions, we are not aware of any provisions that explicitly preclude or limit the successors obligations to honor the obligations of the original sponsor. As a
result, we did not make any significant adjustments to our estimated subrogation recoveries with respect to the credit risk of these sponsors or their successors. We believe that focusing our loan remediation efforts on large financial institutions
first will provide the greatest economic benefit to Ambac. Ambac retains the right to review all RMBS transactions for representations and warranties breaches. Since a significant number of other second-lien and first-lien transactions are also
experiencing poor performance, management is considering expanding the scope of this effort.



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Below is the rollforward of RMBS
subrogation for the period December 31, 2009 through September 30, 2010:



|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|-------------------------------------------------------------- |  | ------------ | ------- |  | --------- |  | --- | ------------- |  | - | --------- | - |  |  | --- | 
|($ in millions)                                                |  | Randomsample |         |  | # ofdeals |  |     | AdverseSample |  |   | # ofdeals |  
|Rollforward:                                                   |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Discounted RMBS subrogation (gross of reinsurance) at 12/31/09 |  | $            | 1,586.2 |  |           |  | 9   |               |  | $ | 460.6     |   |  |  | 10  | 
|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Changes recognized in 2010:                                    |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Additional transactions reviewed                               |  |              | 126.2   |  |           |  | 3   |               |  |   | 193.9     |   |  |  | 5   | 
|Additional adverse sample loans reviewed                       |  |              |        |  |           |  | n/a |               |  |   | 59.4      |   |  |  | n/a | 
|Loans repurchased by the sponsor                               |  |              |        |  |           |  | n/a |               |  |   | (23.9     | ) |  |  | n/a | 
|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Subtotal of changes recognized in current period               |  |              | 126.2   |  |           |  | 3   |               |  |   | 229.4     |   |  |  | 5   | 
|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Changes from re-estimation of opening balance:                 |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Change in pre-recovery loss reserves                           |  |              | 0.4     |  |           |  | n/a |               |  |   | 19.8      |   |  |  | n/a | 
|Other                                                          |  |              |        |  |           |  | n/a |               |  |   | (1.3      | ) |  |  | n/a | 
|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Subtotal of changes from re-estimation of opening balance      |  |              | 0.4     |  |           |  |    |               |  |   | 18.5      |   |  |  |    | 
|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 
|Discounted RMBS subrogation (gross of reinsurance) at 9/30/10  |  | $            | 1,712.8 |  |           |  | 12  |               |  | $ | 708.5     |   |  |  | 15  | 
|                                                               |  |              |         |  |           |  |     |               |  |   |           |   |  |  |     | 

As a consequence of the Segregated Account Rehabilitation Proceedings, the rehabilitator retains operational
control and decision-making authority with respect to all matters related to the Segregated Account, including surveillance, remediation and loss mitigation. As noted in Item 1 Recent Developments, all RMBS policies were allocated
to the Segregated Account and as such, the foregoing discussion of Ambacs risk management practices is qualified by reference to the rehabilitators exercise of its discretion to alter or eliminate the above risk management practices
relating to representation and warranty breaches by RMBS transaction sponsors.

Our ability to recover the RMBS subrogation
recoveries is subject to significant uncertainty, including risks inherent in litigation, collectability of such amounts from counterparties (and/or their respective parents and affiliates), timing of receipt of any such recoveries, regulatory
intervention which could impede our ability to take actions required to realize such recoveries and uncertainty inherent in the assumptions used in estimating such recoveries. Our current estimate considers that we will receive subrogation
recoveries of $903.8 million and $1,599.5 million in 2011 and 2013, respectively. The amount of these subrogation recoveries is significant and if were unable to recover any amounts our future available liquidity to pay claims would be reduced
and our stockholders deficit as of September 30, 2010 would increase from $1,217.6 million to $3,613.0 million.

Reasonably Possible Additional Losses:

It is possible that our loss estimate assumptions for the RMBS insurance policies discussed above could be materially under-estimated as a result of continued deterioration in housing prices, the effects
of a weakened economy marked by growing unemployment and wage pressures and/or continued illiquidity of the mortgage market. In other words, we believe that it is possible that the loss pattern for RMBS transactions could be more severe and
prolonged than estimated. Additionally, our actual subrogation recoveries could be lower than our current estimates if the sponsors of these transactions: (i) fail to honor their obligations to repurchase the mortgage loans,
(ii) successfully dispute our breach findings, or (iii) no longer have the financial means to fully satisfy their obligations under the transaction documents.



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For second-lien
mortgage credits for which we have an estimate of expected loss at September 30, 2010, the reasonably possible increase in loss reserves could be approximately $772 million. The reasonably possible scenario for second-lien mortgage
collateral generally assumes that the voluntary constant prepayment rate decreases by 1 to 5 percent (depending on transaction performance), and the current-to-30 day roll assumption over a nine month period increases by 0.25 percent to 1
percent (depending on transaction performance). In addition, the loss severities for second-lien products may be greater because of increased carrying costs and servicing advances that are not recovered and we frequently increased them in a
range between 1 to 3 percent. The first-lien mortgage credits for which we have an estimate of expected losses at September 30, 2010 have a reasonably possible increase in loss reserves of approximately $577 million. The reasonably
possible scenario for first-lien mortgage credits assumes that aggravated losses occur as a result of deterioration of macroeconomic factors and a reduced impact from government programs and servicer intervention.

It is possible that our loss estimate assumptions for student loan credits could be materially under-estimated as a result of various
uncertainties including but not limited to, the interest rate environment, an increase in default rates and loss severities on the collateral due to economic factors, as well as a failure of issuers to refinance insured bonds which have a failed
debt structure. Our student loan portfolio consists of credits collateralized by (i) federally guaranteed loans under the Federal Family Education Loan Program (FFELP) and (ii) private student loans. Whereas FFELP loans
are guaranteed for a minimum of 97% of defaulted principal and interest, private loans have no government guarantee and therefore are subject to credit risk as with other types of unsecured credit. Recent default data has shown a significant
deterioration in the performance of private student loans underlying our transactions. Further, a significant number of Ambacs insured student loan exposures were financed with Auction Rate Securities or Variable Rate Demand Obligations. Due
to the failure of the auction rate and variable rate markets, the interest rates on these securities increased significantly to punitive levels pursuant to the terms of the documents. Such increases have caused the collateralization ratio in these
transactions to deteriorate on an accelerated basis due to negative excess spread and/or the use of principal receipts to pay current interest. Although some issuers have been successful in refinancing some of their failed debt obligations,
refinancing alternatives are limited, and refinancing options for private loans are severely impaired. Effective July 1, 2010, lenders are unable to originate guaranteed loans, due to the termination of the FFELP program. The resulting
reduction in revenues may adversely affect a number of issuers, whose ability to continue as administrator of the relevant transaction trusts may become at risk. For student loan credits for which we have an estimate of expected loss at
September 30, 2010, the reasonably possible increase in loss reserves from the September 30, 2010 balance could be approximately $2,061 million. The reasonably possible scenario considers the highest stress scenario that was utilized in
the development of our probability weighted expected loss at September 30, 2010.

Ambacs management believes that
the reserves for losses and loss expenses and unearned premium reserves are adequate to cover the ultimate net cost of claims, but reserves for losses and loss expenses are based on estimates and there can be no assurance that the ultimate liability
for losses will not exceed such estimates.

Valuation of Financial Instruments.Ambacs financial
instruments are reported on the Consolidated Balance Sheets at fair value, and those subject to valuation estimates include investments in fixed income securities, VIE assets and liabilities, and derivatives comprising credit default, interest rate
and currency swap transactions.

The fair market values of financial instruments held are determined by using independent
market quotes when available and valuation models when market quotes are not available. ASC Topic 820, Fair Value Measurements and Disclosuresrequires the categorization of these assets and liabilities according to a fair value valuation
hierarchy. Approximately 80% of our assets and approximately 59% of our



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liabilities are carried at fair value and categorized in either Level 2 of the valuation hierarchy (meaning that their fair value was determined by reference to quoted prices for similar
instruments in active markets, quoted prices for identical or similar instruments in inactive markets and other observable inputs) or Level 3 (meaning that their fair value was determined by reference to significant inputs that are unobservable in
the market and therefore require a greater degree of management judgment). The determination of fair value for financial instruments categorized in Level 2 or 3 involves significant judgment due to the complexity of factors contributing to the
valuation. The current market disruption makes valuation even more difficult and subjective. Third-party sources from which we obtain independent market quotes also use assumptions, judgments and estimates in determining financial instrument values
and different third parties may use different methodologies or provide different prices for securities. In addition, the use of internal valuation models for certain highly structured instruments, such as credit default swaps, require assumptions
about markets in which there has been a negligible amount of trading activity for over one year. As a result of these factors, the actual trade value of a financial instrument in the market, or exit value of a financial instrument position owned by
Ambac, may be significantly different from its recorded fair value. Refer to Note 11 to the Unaudited Consolidated Financial Statements for discussion related to the transfers in and/or out of Level 1, 2 and 3 fair value categories.

Investment in Fixed Income Securities:

Investments in fixed income securities are accounted for in accordance with ASC Topic 320, Investments  Debt and Equity Securities. ASC Topic 320 requires that all debt instruments and
certain equity instruments be classified in Ambacs Consolidated Balance Sheets according to their purpose and, depending on that classification, be carried at either cost or fair market value. The fair values of fixed income investments held
in the investment portfolios of Ambac and its operating subsidiaries are based primarily on quoted market prices received from dealer quotes or alternative pricing sources with reasonable levels of price transparency. For those fixed income
investments where quotes were not available, fair values are based on internal valuation models. Refer to Note 11 to the Unaudited Consolidated Financial Statements for further discussion of the valuation methods, inputs and assumptions for fixed
income securities. Ambac performs various review and validation procedures to quoted and modeled prices for fixed income securities, including price variance analyses, missing and static price reviews, overall valuation analyses by senior traders
and finance managers and reviews associated with our ongoing impairment analysis. Unusual prices identified through these procedures will be evaluated further against separate broker quotes (if available) or internally modeled prices, and the
pricing source values will be challenged as necessary. Price challenges generally result in the use of the pricing sources quote as originally provided or as revised by the source following their internal diligence process. A price challenge
may result in a determination by the pricing source that they cannot provide a reasonable value for a security, in which case Ambac would resort to using either other quotes or internal models. Valuation results, particularly those derived from
valuation models and quotes on certain mortgage and asset-backed securities, could differ materially from amounts that would actually be realized in the market.

Ambacs investments in fixed income securities (excluding VIE investments) classified as available-for-sale are carried at fair value, with the after-tax difference from amortized cost
reflected in stockholders equity as a component of Accumulated Other Comprehensive Loss (AOCL). One of the significant estimates related to available-for-sale securities is the evaluation of investments for other-than-temporary
impairments. Effective April 1, 2009, Ambac adopted ASC Paragraph 320-10-65-1 of ASC Topic 320. ASC Paragraph 320-10-65-1 amends existing GAAP guidance for recognition of other-than-temporary impairments of debt securities. Beginning with the
quarter ended June 30, 2009, if management assesses that it either (i) has the intent to sell its investment in a debt security or (ii) more likely than not will be required to sell the debt security before the anticipated recovery of
its amortized



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cost basis less any current period credit loss, then an other-than-temporary impairment charge must be recognized in earnings, with the amortized cost of the security being written-down to fair
value. If these conditions are not met, but it is determined that a credit loss exists, the impairment is separated into the amount related to the credit loss, which is recognized in earnings, and the amount related to all other factors, which is
recognized in other comprehensive income. To determine whether a credit loss has occurred, management considers certain factors, including the length of time and extent to which the fair value of the security has been less than its amortized cost
and downgrades of the securitys credit rating. If such factors indicate that a potential credit loss exists, then management will compare the present value of estimated cash flows from the security to the amortized cost basis to assess whether
the entire amortized cost basis will be recovered. When it is determined that the entire amortized cost basis will not be recovered, a credit impairment charge is recorded in earnings in the amount of the difference between the present value of cash
flows and the amortized cost at the balance sheet date, with the amortized cost basis of the impaired security written-down to the present value of cash flows. Ambac uses the single most likely cash flow scenario in the assessment and measurement of
credit impairments. Estimated cash flows are discounted at the effective interest rate implicit in the security at the date of acquisition or upon last impairment. For floating rate securities, estimated cash flows are projected using the relevant
index rate forward curve and the discount rate is adjusted for changes in that curve since the date of acquisition or last impairment. Prior to April 1, 2009, if a decline in the fair value of an available-for-sale security was judged to be
other-than-temporary a charge was recorded in net realized losses equal to the full amount of the difference between the fair value and amortized cost basis of the security. For fixed income securities, the Company accretes the new cost basis to par
or to the estimated future cash flows over the expected remaining life of the security by adjusting the securitys yield.

The evaluation of securities for impairments is a quantitative and qualitative process, which is subject to risks and uncertainties and
is intended to determine whether declines in the fair value of investments should be recognized in current period earnings. The risks and uncertainties include changes in general economic conditions, the issuers financial condition and/or
future prospects, the effects of changes in interest rates or credit spreads and the expected recovery period. There is also significant judgment in determining whether Ambac intends to sell securities or will continue to have the ability to hold
temporarily impaired securities until recovery. Future events could occur that were not reasonably foreseen at the time management rendered its judgment on the Companys intent to retain such securities until recovery. Examples of such events
include, but are not limited to, the deterioration in the issuers creditworthiness, a change in regulatory requirements or a major business combination or major disposition.

VIE Assets and Liabilities:

The asset and liabilities of VIEs consolidated
under ASC Topic 810 consist primarily of fixed income securities, loans receivable, derivative instruments and debt instruments and are generally carried at fair value with changes in fair value recognized in Financial Guarantee: (Loss) income on
variable interest entities of the Consolidated Statements of Operations. These consolidated VIEs are securitization entities which have liabilities and/or assets guaranteed by Ambac or which issued debt that is the reference obligation of credit
derivatives written by Ambac to third parties. The fair values of VIE debt instruments are determined using the same methodologies used to value Ambacs fixed income securities in its investment portfolio as described above. VIE debt fair value
is based on market prices received from dealer quotes or alternative pricing sources with reasonable levels of price transparency. Such quotes generally consider a variety of factors, including recent trades of the same and similar securities. For
those VIE debt instruments where quotes were not available, the debt instrument fair values are based primarily on internal valuation models.



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VIE derivative
asset and liability fair values are determined using valuation models. When specific derivative contractual terms are available and may be valued primarily by reference to interest rates, exchange rates and yield curves that are observable and
regularly quoted the derivatives are valued using vendor-developed models. Other derivatives within the VIEs that include significant unobservable valuation inputs are valued using internally developed models. All VIE derivatives at
September 30, 2010 and December 31, 2009 use vendor-developed models and do not require the use of significant unobservable inputs.

The fair value of VIE assets are obtained from market quotes when available. Typically the asset fair values are not readily available from market quotes and are estimated internally. The consolidated
VIEs are securitization entities in which net cash flows from assets and derivatives (after adjusting for financial guarantor cash flows and other expenses) will be paid out to note holders or equity interests. Our valuation of VIE assets (fixed
income securities or loans), therefore, are derived from the fair value of notes and derivatives, as described above, adjusted for the fair value of cash flows from Ambacs financial guarantee. The fair value of financial guarantee cash flows
include: (i) estimated future premiums discounted at a rate consistent with that implicit in the fair value of the VIEs liabilities and (ii) internal estimates of future loss payments by Ambac discounted to consider Ambacs own
credit risk.

Derivatives:

Ambacs operating subsidiaries exposure to derivative instruments is created through interest rate, currency, and credit default swaps. These contracts are accounted for at fair value under ASC
Topic 815, Derivatives and Hedging. Valuation models are used for the derivative portfolio, using market data from a variety of third-party data sources. Several of the more significant types of market data that influence fair value include
interest rates (taxable and tax-exempt), credit spreads, default probabilities, recovery rates, comparable securities with observable pricing, and the credit rating of the referenced entities. Refer to Note 11 to the Unaudited Consolidated Financial
Statements for further discussion of the models, model inputs and assumptions used to value derivative instruments. Due to the inherent uncertainties of the assumptions used in the valuation models to determine the fair value of derivative
instruments, actual value realized in a market transaction may differ significantly from the estimates reflected in our financial statements.

As described in Note 11 to the Unaudited Consolidated Financial Statements, the fair values of credit derivatives are sensitive to changes in credit ratings on the underlying reference obligations,
particularly when such changes reach below investment grade levels. Ratings changes are reflected in Ambacs valuation model as changes to the relative change ratio, which represents the ratio of the estimated cost of credit
protection relative to the cash market spread on the reference obligation. Such adjustments to the relative change ratio have primarily impacted the fair value of CDO of ABS transactions containing over 25% MBS exposure which suffered significant
credit downgrades. See Note 1 to the Unaudited Consolidated Financial Statements for the commutation of all such transactions under the Settlement Agreement. Downgrades since inception have occurred in CDS transactions representing approximately 82%
of par outstanding as of September 30, 2010. The average rating for these transactions was AA- as of September 30, 2010 and, therefore, changes to the relative change ratio have not been significant.

Ambacs credit derivative valuation model, like any financial model, has certain strengths and weaknesses. We believe our
models primary strength is that it maximizes the use of market-driven inputs, and, most importantly, its use of market-based fair values of the underlying reference obligations and discount rate utilized. Ambac employs a three-level hierarchy
for obtaining reference obligation fair values used in the model as follows: (i) broker quotes on the reference obligation, (ii) broker quotes on a subordinate obligation within the same capital structure as the reference obligation and
(iii) proxy spreads



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from similarly structured deals or other market proxies. We believe using this type of approach is preferable to other models, which may emphasize modeled expected losses or which rely more
heavily on the use of market indices that may not be reflective of the underlying reference obligation. Another strength is that our model is relatively easy to understand, which increases its transparency.

A potential weakness of our valuation model is our reliance on broker quotes obtained from dealers which originated the underlying
transactions, who in certain cases may also be the counterparty to our CDS transaction. All of the transactions falling into this category are illiquid and it is usually difficult to obtain alternative quotes. Ambac employs various procedures to
corroborate the reasonableness of quotes received, including comparing to other quotes received on similarly structured transactions, observed spreads on structured products with comparable underlying assets and, on a selective basis when possible,
values derived through internal estimates of discounted future cash flows. Each quarter, the portfolio of CDS transactions is reviewed to ensure every reference obligation price has been updated. Period to period valuations are compared for each CDS
and by underlying bond type. For each CDS, this analysis includes comparisons of key valuation inputs to the prior period and against other CDS within the bond type. No adjustments were made to the broker quotes we received when determining fair
value of CDS contracts as of September 30, 2010. Another potential weakness of our valuation model is the lack of new CDS transactions executed by financial guarantors, including Ambac, in the current distressed market environment, which makes
it difficult to validate the percentage of the reference obligation spread which would be captured as a CDS fee at the valuation date, (i.e. the relative change ratio, a key component of our valuation calculation). Changes to the relative change
ratio based on internal ratings assigned are another potential weakness as internal ratings could differ from actual ratings provided by rating agencies. However, we believe our internal ratings are updated at least as frequently as the external
ratings. Nonetheless, we believe the approach we have developed, described above, to increase the relative change ratio as the underlying reference obligation experiences credit deterioration is consistent with a market-based approach to valuation.
Ultimately, our approach shares a weakness with other modeling approaches as it is unclear if we could execute at these values, particularly with the current dislocation in the credit markets.

Valuation of Deferred Tax Assets.Our provision for taxes is based on our income, statutory tax rates and tax planning
opportunities available to us in the jurisdictions in which we operate. Tax laws are complex and subject to different interpretations by the taxpayer and respective governmental taxing authorities. Significant judgment is required in determining our
tax expense and in evaluating our tax positions. We review our tax positions quarterly and adjust the balances as new information becomes available. Deferred tax assets arise because of temporary differences between the financial reporting and tax
bases of assets and liabilities, as well as from net operating loss and tax credit carry forwards. More specifically, deferred tax assets represent a future tax benefit (or receivable) that results from losses recorded under U.S. GAAP in a current
period which are only deductible for tax purposes in future periods and net operating loss carry forwards. In accordance with ASC Topic 740,Income Taxes, we evaluate our deferred income taxes quarterly to determine if valuation allowances
are required. ASC Topic 740 requires that companies assess whether valuation allowances should be established against their deferred tax assets based on the consideration of all available evidence using a more likely than not standard.
All available evidence, both positive and negative, needs to be identified and considered in making the determination with significant weight given to evidence that can be objectively verified. The level of deferred tax asset recognition is
influenced by managements assessment of future expected taxable income, which depends on the existence of sufficient taxable income of the appropriate character (ordinary vs. capital) within the carry back or carry forward periods available
under the tax law. In the event that we determine that we would not be able to realize all or a portion of our deferred tax assets, we would record a valuation allowance against the deferred tax assets that we estimate will not ultimately be
recoverable in the period in which that determination is made.



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Financial Guarantee Exposures

The following table provides a breakdown of guaranteed net par outstanding by market sector at September 30, 2010 and
December 31, 2009. Guaranteed net par outstanding includes the exposures of policies that insure VIEs consolidated in accordance with ASU 2009-17:



|                          |  |                   |       |  |                  |   |       | 
|------------------------- |  | ----------------- | ----- |  | ---------------- | - | ----- | 
|($ in billions)           |  | September 30,2010 |       |  | December 31,2009 |  
|Public Finance            |  | $                 | 206.6 |  |                  | $ | 223.2 | 
|Structured Finance        |  |                   | 79.4  |  |                  |   | 114.7 | 
|International Finance     |  |                   | 48.0  |  |                  |   | 52.5  | 
|                          |  |                   |       |  |                  |   |       | 
|Total net par outstanding |  | $                 | 334.0 |  |                  | $ | 390.4 | 
|                          |  |                   |       |  |                  |   |       | 

The decrease in structured finance is primarily due to CDO of ABS transactions commuted under the Settlement
Agreement with certain counterparties ($17.8 billion of net par exposures). Refer to Note 1 to the Unaudited Consolidated Financial Statements for further discussion of the Settlement Agreement.

The following table provides a rating distribution of guaranteed total net par outstanding based upon internal Ambac Assurance credit
ratings at September 30, 2010 and December 31, 2009 and a distribution by bond type of Ambac Assurances below investment grade exposures at September 30, 2010 and December 31, 2009. Below investment grade is defined as
those exposures with a credit rating below BBB-:



|      |  |                                       |     |   |                  |  |     |  
|----- |  | ------------------------------------- | --- | - | ---------------- |  | --- | -
|      |  | Percentage of Guaranteed Portfolio(1) |    
|      |  | September 30,2010                     |     |   | December 31,2009 | 
|AAA   |  |                                       | 2   | % |                  |  | 2   | %
|AA    |  |                                       | 24  |   |                  |  | 24  |  
|A     |  |                                       | 43  |   |                  |  | 41  |  
|BBB   |  |                                       | 18  |   |                  |  | 18  |  
|BIG   |  |                                       | 13  |   |                  |  | 15  |  
|      |  |                                       |     |   |                  |  |     |  
|Total |  |                                       | 100 | % |                  |  | 100 | %
|      |  |                                       |     |   |                  |  |     |  



|(1) | Internal Ambac credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac Assurance. In cases
where Ambac has insured multiple tranches of an issue with varying internal ratings, or more than one obligation of an issuer with varying internal ratings, a weighted average rating is used. Ambac credit ratings are subject to revision at any time
and do not constitute investment advice. Ambac Assurance, or one of its affiliates, has guaranteed the obligations listed and may also provide other products or services to the issuers of these obligations for which Ambac may have received premiums
or fees.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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Summary of Below Investment Grade Exposure



|                                             |  |                   |        |  |                  |   |        | 
|-------------------------------------------- |  | ----------------- | ------ |  | ---------------- | - | ------ | 
|Bond Type                                    |  | September 30,2010 |        |  | December 31,2009 |  
|($ in millions)                              |  |                  
|Public Finance:                              |  |                   |        |  |                  |   |        | 
|Transportation                               |  | $                 | 1,114  |  |                  | $ | 1,113  | 
|Health care                                  |  |                   | 262    |  |                  |   | 307    | 
|General obligation                           |  |                   | 209    |  |                  |   | 280    | 
|Tax-backed                                   |  |                   | 265    |  |                  |   | 598    | 
|Other                                        |  |                   | 832    |  |                  |   | 658    | 
|                                             |  |                   |        |  |                  |   |        | 
|Total Public Finance                         |  |                   | 2,682  |  |                  |   | 2,956  | 
|                                             |  |                   |        |  |                  |   |        | 
|Structured Finance:                          |  |                   |        |  |                  |   |        | 
|CDO of ABS > 25% RMBS(1)                     |  |                   |       |  |                  |   | 16,718 | 
|Mortgage-backed and home equityfirst lien   |  |                   | 13,058 |  |                  |   | 13,477 | 
|Mortgage-backed and home equity second lien |  |                   | 10,521 |  |                  |   | 12,050 | 
|Auto Rentals                                 |  |                   | 1,808  |  |                  |   | 2,849  | 
|Student loans                                |  |                   | 11,398 |  |                  |   | 3,910  | 
|Enhanced equipment trust certificates        |  |                   | 441    |  |                  |   | 473    | 
|Mortgage-backed and home equity  other      |  |                   | 285    |  |                  |   | 584    | 
|Other CDOs                                   |  |                   | 100    |  |                  |   | 523    | 
|Other                                        |  |                   | 1,666  |  |                  |   | 2,106  | 
|                                             |  |                   |        |  |                  |   |        | 
|Total Structured Finance                     |  |                   | 39,277 |  |                  |   | 52,690 | 
|                                             |  |                   |        |  |                  |   |        | 
|International Finance:                       |  |                   |        |  |                  |   |        | 
|Airports                                     |  |                   | 1,532  |  |                  |   | 1,498  | 
|Other                                        |  |                   | 699    |  |                  |   | 1,210  | 
|                                             |  |                   |        |  |                  |   |        | 
|Total International Finance                  |  |                   | 2,231  |  |                  |   | 2,708  | 
|                                             |  |                   |        |  |                  |   |        | 
|Grand Total                                  |  | $                 | 44,190 |  |                  | $ | 58,354 | 
|                                             |  |                   |        |  |                  |   |        | 



|(1) | Decline in CDO of ABS is the result of transactions commuted under the Settlement Agreement with certain counterparties. Refer to Note 1 to the Unaudited consolidated
Financial Statements for further discussion of the Settlement Agreement.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In connection with its
financial guarantee business, Ambac has outstanding commitments to provide guarantees (includes both insurance and credit derivatives) of $6.7 billion at September 30, 2010. These commitments relate to potential future debt issuances or
increases in funding levels for existing insurance or credit derivative transactions. Commitments generally have fixed termination dates and are contingent on the satisfaction of all conditions set forth in the contract. These commitments may expire
unused or be reduced or cancelled at the counterpartys request. Additionally, approximately 83% of the total commitment amount represents commitments that contain one or more of the following provisions: (i) the commitment may be
terminated at Ambacs election upon a material adverse change, (ii) in order for the funding levels to be increased, certain eligibility requirements must be met, or, (iii) for commitments to provide protection, the commitment may not
be exercised upon an event of default or after the reinvestment period. Moreover, as a consequence of the Segregated Account Rehabilitation Proceedings and under the terms of the Settlement Agreement, it is unclear whether such new policies could be
issued. Accordingly, the $6.7 billion of commitments outstanding at September 30, 2010 do not necessarily reflect actual future amounts. Additionally, due to Ambacs current financial strength ratings and investor concern with respect to
our financial position, certain commitments are unlikely to be exercised.



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RESIDENTIAL MORTGAGE-BACKED
SECURITIES EXPOSURE

General economic conditions, including any effects, positive or negative, of the recently enacted
Federal stimulus programs which provide aid to state and local governments as well as to certain homeowners, may continue to affect all financial institutions, including Ambac. Currently, the only Federal program that Ambac considers in determining
its loss reserve levels is the Home Affordable Modification Program (HAMP). Announced in March 2009, HAMP is expected to help 3 to 4 million at-risk, qualified homeowners avoid foreclosure by modifying the terms of existing loans to reduce
monthly mortgage payments to an affordable level. Lenders find loan modifications helpful because it is less expensive for them to modify certain loans than foreclose on the property. The program is expected to end in December 2012.

RMBS portfolio exposures included in financial guarantee insurance portfolio

Structured Finance includes exposure to sub-prime and mid-prime residential mortgage-backed securities. Ambac has exposure to the U.S.
mortgage market through direct guarantees in the mortgage-backed securities (MBS) portfolio. Ambac insures tranches issued in RMBS, including transactions that contain risks to first and second-liens. Ambac generally insures the most
senior tranche of the RMBS, from a given loss attachment point to the top of the capital structure. The insured RMBS in the BBB portion of the table below are all relatively large senior tranches that reside at the top of the capital structure.
Because of their size and position in the capital structure, these tranches generally produce lower levels of loss severity, upon collateral default, than BBB-rated mezzanine tranches with similar collateral.

The following tables provide current gross par outstanding by vintage and type, and underlying credit rating of Ambacs affected
U.S. RMBS book of business:



|                         |  |                                                                  |          |   |           |   |         |              |  |   |          |  
|------------------------ |  | ---------------------------------------------------------------- | -------- | - | --------- | - | ------- | ------------ |  | - | -------- | -
|                         |  | Total Gross Par OutstandingAt
September 30, 2010 ($ in millions) |         
|Year of Issue            |  | Second Lien                                                      |          |   | Sub-prime |   |         | Mid-prime(1) | 
|1998-2001                |  | $                                                                | 132.3    |   |           | $ | 730.7   |              |  | $ | 8.0      |  
|2002                     |  |                                                                  | 62.1     |   |           |   | 673.6   |              |  |   | 79.6     |  
|2003                     |  |                                                                  | 41.8     |   |           |   | 1,036.5 |              |  |   | 599.1    |  
|2004                     |  |                                                                  | 1,444.8  |   |           |   | 541.8   |              |  |   | 899.4    |  
|2005                     |  |                                                                  | 1,469.9  |   |           |   | 1,197.7 |              |  |   | 2,933.9  |  
|2006                     |  |                                                                  | 3,740.5  |   |           |   | 888.7   |              |  |   | 2,407.0  |  
|2007                     |  |                                                                  | 4,237.5  |   |           |   | 568.7   |              |  |   | 3,484.4  |  
|                         |  |                                                                  |          |   |           |   |         |              |  |   |          |  
|Total                    |  | $                                                                | 11,128.9 |   |           | $ | 5,637.7 |              |  | $ | 10,411.4 |  
|                         |  |                                                                  |          |   |           |   |         |              |  |   |          |  
|% of Total MBS Portfolio |  |                                                                  | 35.1     | % |           |   | 17.8    | %            |  |   | 32.8     | %



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|                                |  |                                                                                           |          |   |           |   |        |              |  |   |         |  
|------------------------------- |  | ----------------------------------------------------------------------------------------- | -------- | - | --------- | - | ------ | ------------ |  | - | ------- | -
|                                |  | Gross claim liability, before Subrogation RecoveriesAt September 30, 2010 ($ in millions) |         
|Year of Issue                   |  | SecondLien                                                                                |          |   | Sub-prime |   |        | Mid-prime(1) | 
|1998-2001                       |  | $                                                                                         | 2.7      |   |           | $ | 5.7    |              |  | $ |        |  
|2002                            |  |                                                                                           |         |   |           |   | 3.4    |              |  |   |        |  
|2003                            |  |                                                                                           | 3.4      |   |           |   | 1.7    |              |  |   | 2.2     |  
|2004                            |  |                                                                                           | 326.8    |   |           |   | 0.5    |              |  |   | 1.2     |  
|2005                            |  |                                                                                           | 381.9    |   |           |   | 28.8   |              |  |   | 507.7   |  
|2006                            |  |                                                                                           | 1,659.0  |   |           |   | 177.4  |              |  |   | 610.6   |  
|2007                            |  |                                                                                           | 544.3    |   |           |   | 105.5  |              |  |   | 688.5   |  
|                                |  |                                                                                           |          |   |           |   |        |              |  |   |         |  
|Total                           |  | $                                                                                         | 2,918.1  |   |           | $ | 323.0  |              |  | $ | 1,810.2 |  
|                                |  |                                                                                           |          |   |           |   |        |              |  |   |         |  
|                                | 
|                                |  | Gross Subrogation RecoveriesAt
September 30, 2010 ($ in millions)                         |         
|Year of Issue                   |  | Second Lien                                                                               |          |   | Sub-prime |   |        | Mid-prime(1) | 
|1998-2001                       |  | $                                                                                         |         |   |           | $ |       |              |  | $ |        |  
|2002                            |  |                                                                                           |         |   |           |   |       |              |  |   |        |  
|2003                            |  |                                                                                           |         |   |           |   |       |              |  |   |        |  
|2004                            |  |                                                                                           | (95.5    | ) |           |   |       |              |  |   |        |  
|2005                            |  |                                                                                           | (185.2   | ) |           |   |       |              |  |   | (16.5   | )
|2006                            |  |                                                                                           | (722.4   | ) |           |   |       |              |  |   | (119.9  | )
|2007                            |  |                                                                                           | (936.2   | ) |           |   | (219.3 | )            |  |   | (126.3  | )
|                                |  |                                                                                           |          |   |           |   |        |              |  |   |         |  
|Total                           |  | $                                                                                         | (1,939.3 | ) |           | $ | (219.3 | )            |  | $ | (262.7  | )
|                                |  |                                                                                           |          |   |           |   |        |              |  |   |         |  
|                                | 
|                                |  | Percent of Related RMBS Transactions Gross ParAt September 30, 2010                      |         
|Internal Ambac Credit
Rating(2) |  | Second Lien                                                                               |          |   | Sub-prime |   |        | Mid-prime(1) | 
|AAA                             |  |                                                                                           | 0        | % |           |   | 5      | %            |  |   | 2       | %
|AA                              |  |                                                                                           | <0.1     | % |           |   | 4      | %            |  |   | 5       | %
|A                               |  |                                                                                           | 2        | % |           |   | 9      | %            |  |   | 6       | %
|BBB(3)                          |  |                                                                                           | 2        | % |           |   | 4      | %            |  |   | 2       | %
|Below investment grade(3)       |  |                                                                                           | 96       | % |           |   | 78     | %            |  |   | 85      | %



|(1) | Mid-prime includes Alt-A transactions and affordability product transactions, which includes interest only or option adjustable rate features.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Ambac ratings set forth above reflect the internal Ambac ratings as of September 30, 2010, and may be changed at any time based on our internal credit review.
Ambac undertakes no obligation to update such ratings. This does not constitute investment advice. Ambac or one of its affiliates has guaranteed the obligations listed and may also provide other products or services to the issuers of these
obligations for which Ambac may have received premiums or fees.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Ambacs BBB internal rating reflects bonds which are of medium grade credit quality with adequate capacity to pay interest and repay principal. Certain protective
elements and margins may weaken under adverse economic condition and changing circumstances. These bonds are more likely than higher rated bonds to exhibit unreliable protection levels over all cycles. Ambacs below investment grade internal
ratings reflect bonds which are of speculative grade credit quality with the adequacy of future margin levels for payment of interest and repayment of principal potentially adversely affected by major ongoing uncertainties or exposure to adverse
conditions. Ambacs below investment grade category includes transactions on which we are currently paying claims.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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RMBS
exposure in collateralized debt obligations

Ambacs outstanding CDO exposures are comprised of the following
asset type and credit ratings as of September 30, 2010 and December 31, 2009:



|                                            |         |                    |      |            |                   |  |         |   |  |            |      |  |  |  |     |  
|------------------------------------------- | ------- | ------------------ | ---- | ---------- | ----------------- |  | ------- | - |  | ---------- | ---- |  |  |  | --- | -
|Business Mix by Net Par
($ in billions)     |         | September 30, 2010 |      |            | December 31, 2009 | 
|                                            | Net Par |                    |      | Percentage |                   |  | Net Par |   |  | Percentage |     
|High yield Corporate (CLO)                  |         | $                  | 14.3 |            |                   |  | 74      | % |  | $          | 21.2 |  |  |  | 48  | %
|CDO of ABS > 25% MBS(2)                     |         |                    |     |            |                   |  |        |   |  |            | 16.7 |  |  |  | 38  |  
|CDO of ABS < 25% MBS                        |         |                    | 2.2  |            |                   |  | 11      |   |  |            | 2.6  |  |  |  | 6   |  
|Market value CDOs                           |         |                    | 1.5  |            |                   |  | 8       |   |  |            | 1.6  |  |  |  | 4   |  
|Other                                       |         |                    | 1.4  |            |                   |  | 7       |   |  |            | 2.0  |  |  |  | 4   |  
|                                            |         |                    |      |            |                   |  |         |   |  |            |      |  |  |  |     |  
|Total                                       |         | $                  | 19.4 |            |                   |  | 100     | % |  | $          | 44.1 |  |  |  | 100 | %
|                                            |         |                    |      |            |                   |  |         |   |  |            |      |  |  |  |     |  
|                                            |         |                   
|Ambac Ratings by Net
Par(1) ($ in
billions) |         | September 30, 2010 |      |            | December 31, 2009 | 
|                                            | Net Par |                    |      | Percentage |                   |  | Net Par |   |  | Percentage |     
|AAA                                         |         | $                  | 2.3  |            |                   |  | 12      | % |  | $          | 4.2  |  |  |  | 9   | %
|AA                                          |         |                    | 10.9 |            |                   |  | 56      |   |  |            | 17.0 |  |  |  | 39  |  
|A                                           |         |                    | 5.6  |            |                   |  | 29      |   |  |            | 3.8  |  |  |  | 9   |  
|BBB                                         |         |                    | 0.5  |            |                   |  | 3       |   |  |            | 1.8  |  |  |  | 4   |  
|Below investment grade(2)                   |         |                    | 0.1  |            |                   |  |        |   |  |            | 17.3 |  |  |  | 39  |  
|                                            |         |                    |      |            |                   |  |         |   |  |            |      |  |  |  |     |  
|Total                                       |         | $                  | 19.4 |            |                   |  | 100     | % |  | $          | 44.1 |  |  |  | 100 | %
|                                            |         |                    |      |            |                   |  |         |   |  |            |      |  |  |  |     |  



|(1) | Internal Ambac credit ratings are provided solely to indicate the underlying credit quality of guaranteed obligations based on the view of Ambac. Ambac ratings set
forth above reflect the internal Ambac ratings as of September 30, 2010, and may be changed at any time based on our internal credit review. This does not constitute investment advice. Ambac or one of its affiliates has guaranteed the
obligations included above and may also provide other products or services to the issuers of these obligations for which Ambac may have received premiums or fees.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | As a result of the Settlement Agreement with certain Counterparties Ambac commuted all of the remaining CDO of ABS exposures that were BIG. Refer to Note 1 to the
Unaudited Consolidated Financial Statements for further discussion of the Settlement Agreement.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The decline in
CDO of ABS > 25%, BIG and a portion of the high yield corporate (CLO) are the result of the Settlement Agreement, as discussed in Note 1 to the Unaudited Consolidated Financial Statements in Item 1 of this Form 10-Q. Additionally, the
decline in CDO exposures primarily in High Yield Corporate (CLO) was the result of early terminations with certain counterparties.

RMBS investment portfolio exposure

Ambac also has RMBS exposure in
the Financial Guarantee and Financial Services investment portfolios. Please refer to the tables in the Liquidity and Capital ResourcesBalance Sheet section below which display: (i) the fair value of mortgage and asset-backed
securities by classification, (ii) the fair value of RMBS by vintage and type, and (iii) the ratings distribution of the fixed income investment portfolio by segment.



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|Item 2. | Managements Discussion and Analysis of Financial Condition and Results of Operations
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Results of
Operations

The financial results beginning in 2007 and continuing in 2010 have been impacted directly and indirectly by
exposure to residential mortgages and other financial market disruption-related losses. Ambac has experienced significant losses within its financial guarantee business (both insurance policies and credit derivatives transactions) which, beginning
2008, led to rating downgrades of Ambac Assurance by the independent rating agencies. Rating agency actions have contributed to Ambacs inability to generate meaningful amounts of new financial guarantee business beginning in late 2007. Also,
as a result of these downgrades, most of Ambacs financial services counterparties exercised their contractual rights to either terminate contracts and/or obtain additional collateral from Ambac. Terminations of many interest rate, currency and
total return swaps have also resulted in losses to Ambac. The required increase in collateral provided by Ambac caused a rebalancing of the investment portfolio, mostly through transactions between the investment agreement business and Ambac
Assurance. Additionally, the financial guarantee losses and commutations along with financial services terminations and collateral requirements have resulted in partial liquidation of the investment portfolio, adversely impacting investment income.
In limited circumstances, Ambac was able to negotiate terminations of investment agreement contracts at a discount to its liability, recognizing realized gains. The investment portfolio has suffered other-than-temporary impairment losses, especially
among residential mortgage backed securities, due to both credit impairments and managements intent to sell securities which have fair values below their original cost basis.

Ambacs diluted income attributable to common stockholders was $76.0 million, or $0.25 per diluted share, and $2,188.3 million, or
$7.58 per diluted share, for the three months ended September 30, 2010 and 2009, respectively. Ambacs diluted loss attributable to common stockholders were ($671.6) million, or ($2.29) per share, and ($572.7) million, or ($1.99) per
share, for the nine months ended September 30, 2010 and 2009, respectively. The third quarter 2010 financial results compared to 2009 were primarily effected by (i) lower net gains in the change in the fair value of credit derivatives;
(ii) lower net premiums earned; (iii) lower net investment income; (iv) lower Financial Guarantee other income; (v) lower net realized investment gains, and (vi) interest expense related to surplus notes issued in 2010,
partially offset by lower loss and loss expenses incurred. The nine months ended September 30, 2010 results were primarily impacted by (i) lower net gains in the change in the fair value of credit derivatives; (ii) net losses related
to variable interest entity activities; (iii) lower Financial Guarantee other income; (iv) lower net premiums earned, and (v) lower net investment income, partially offset by (i) a lower provision for loss and loss expenses;
(ii) lower other than temporary impairment charges in the investment portfolio in the Financial Guarantee and Financial Services segments; and (iii) a lower provision for income taxes.

The following paragraphs describe the consolidated results of operations of Ambac and its subsidiaries for the three and nine months
ended September 30, 2010 and 2009 and its financial condition as of September 30, 2010 and December 31, 2009. These results are presented for Ambacs two reportable segments: Financial Guarantee and Financial Services.

Financial Guarantee:

Effective January 1, 2010, Ambac adopted ASU 2009-16, Transfers and Servicing (Topic 860): Accounting for Transfers of Financial Assets and ASU 2009-17, Consolidations
(Topic 810): Improvements to Financial Reporting by Enterprises Involved with Variable Interest Entities.Among other things, ASU 2009-17 requires an enterprise to perform an analysis to determine whether the enterprises variable
interests give it a controlling financial interest in a VIE. ASU 2009-17 identifies the primary beneficiary of a VIE as the enterprise that has both the following characteristics: a) the power to



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direct the activities of the VIE that most significantly impact the VIEs economic performance and b) the obligation to absorb losses of the VIE that could potentially be significant to the
VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. As a result, a cumulative effect adjustment of $705.0 million was recorded as a net increase to total equity at January 1, 2010. Refer to
Note 3 of the Unaudited Consolidated Financial Statements in this Form 10-Q for further discussion of the cumulative effect of adopting the standard. With the implementation of ASU 2009-16 and ASU 2009-17, amounts reported in 2010 are not comparable
to amounts that were reported in 2009 for the significant majority of the Financial Guarantee Segment, including, net premiums earned, net investment income, losses incurred and underwriting and operating expenses.

Commutations, Terminations and Settlements of Reinsurance and Credit Derivative Contracts.

As discussed in Note 1 to the Unaudited Consolidated Financial Statements in Item 1 of this Form 10-Q, Ambac Assurance has entered
into a Settlement Agreement with respect to certain CDO-related obligations on March 24, 2010. On June 7, 2010, the Settlement Agreement commuted $17.8 billion of par exposure for a payment by Ambac Assurance of approximately $2.6 billion
plus $2.0 billion of surplus notes. In August 2010, Ambac Assurance settled all of its remaining hedge contracts on exposures commuted as part of this Settlement Agreement for $205 million. Ambac Assurance commuted another CDO of ABS transaction in
an amount equal to its remaining par value of $90 million. In addition to these commutations, Ambac Assurance has also commuted for $96.5 million of cash, certain additional obligations, including certain non-CDO of ABS obligations with par of $1.4
billion.

In July 2010, the Segregated Account of Ambac Assurance Corporation commuted an insurance policy with a cash payment
of $65 million and the issuance of Segregated Account Surplus Notes with a par value of $50 million.

During 2009, Ambac and
Everspan terminated all reinsurance contracts with RAM Reinsurance Company, Swiss Reinsurance Company and all but one reinsurance contract with Radian Asset Assurance Inc. and MBIA Insurance Corporation. The terminations reflect a net recapture of
approximately $22 billion of par. The economic result was net settlement payments to Ambac of $550 million. In connection with the terminations, Ambac recorded net gains of approximately $303 million and $316 million in the Consolidated Statement of
Operations during the three and nine months ended September 30, 2009, respectively ($288.3 million and $299.4 million recorded in other income).

In the third quarter of 2009, Ambac (i) reduced a significant portion of exposure under a CDO of ABS transaction and (ii) commuted another CDO of ABS credit default swap transaction. These
transactions resulted in the reduction of exposure by approximately $2.8 billion and combined cash payments by Ambac of approximately $745.6 million.

Net Premiums Earned.Net premiums earned for the three and nine months ended September 30, 2010 were $143.1 million and $435.3 million, respectively, a decrease of $95.3 million, or
40%, from $238.4 million for the three months ended September 30, 2009 and a decrease of $177.6 million, or 29%, from $612.9 million for the nine months ended September 30, 2009. Net premiums earned include accelerated premiums, which
result from refunding, calls and other accelerations. Certain obligations insured by Ambac have been legally defeased whereby government securities are purchased by the issuer with the proceeds of a new bond issuance, or less frequently with other
funds of the issuer, and held in escrow (a pre-refunding). The principal and interest received from the escrowed securities are then used to retire the Ambac-insured obligations at a future date either to their maturity date or a specified call
date. Ambac has evaluated the provisions in certain financial guarantee insurance policies issued on legally defeased obligations and determined those policies have not been legally extinguished and, therefore, premium revenue recognition has
not been accelerated. Normal net premiums earned for the nine months ended September 30, 2010 has been negatively impacted by (i) no new business since 2007;



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(ii) the adoption of ASU 2009-17; and (iii) several structured finance transaction terminations, partially offset by an increase in net earnings due to reinsurance cancellations that were
executed during 2009. As a result of the adoption of the new consolidations standard and the resulting consolidation of certain VIEs, ($0.8) million and $30.6 million of net premiums earned were not recognized in net premiums earned for the three
and nine months ended September 30, 2010, respectively; rather, the total income statement results of such VIEs were recorded in income (loss) on variable interest entities. Normal net premiums earned exclude accelerated premiums. Normal net
premiums earned and accelerated premiums are reconciled to total net premiums earned in the table below.

The following table
provides a breakdown of net premiums earned by market sector:



|                             |  |                                 |       |  |                                |   |       |      |  |   |       |  |  |   |       | 
|---------------------------- |  | ------------------------------- | ----- |  | ------------------------------ | - | ----- | ---- |  | - | ----- |  |  | - | ----- | 
|                             |  | Three Months EndedSeptember 30, |       |  | Nine Months EndedSeptember 30, |  
|(Dollars in Millions)        |  | 2010                            |       |  | 2009                           |   |       | 2010 |  |   | 2009  | 
|Public Finance               |  | $                               | 44.4  |  |                                | $ | 49.7  |      |  | $ | 134.6 |  |  | $ | 148.1 | 
|Structured Finance           |  |                                 | 42.4  |  |                                |   | 54.0  |      |  |   | 126.5 |  |  |   | 169.8 | 
|International Finance        |  |                                 | 26.3  |  |                                |   | 44.4  |      |  |   | 77.8  |  |  |   | 129.9 | 
|                             |  |                                 |       |  |                                |   |       |      |  |   |       |  |  |   |       | 
|Total normal premiums earned |  |                                 | 113.1 |  |                                |   | 148.1 |      |  |   | 338.9 |  |  |   | 447.8 | 
|Accelerated earnings         |  |                                 | 30.0  |  |                                |   | 90.3  |      |  |   | 96.4  |  |  |   | 165.1 | 
|                             |  |                                 |       |  |                                |   |       |      |  |   |       |  |  |   |       | 
|Total net premiums earned    |  | $                               | 143.1 |  |                                | $ | 238.4 |      |  | $ | 435.3 |  |  | $ | 612.9 | 
|                             |  |                                 |       |  |                                |   |       |      |  |   |       |  |  |   |       | 

The following table provides a breakdown of accelerated earnings by market sector:



|                                      |  |                                 |      |  |                                |   |      |      |  |   |      |  |  |   |       | 
|------------------------------------- |  | ------------------------------- | ---- |  | ------------------------------ | - | ---- | ---- |  | - | ---- |  |  | - | ----- | 
|                                      |  | Three Months EndedSeptember 30, |      |  | Nine Months EndedSeptember 30, |  
|(Dollars in Millions)                 |  | 2010                            |      |  | 2009                           |   |      | 2010 |  |   | 2009 | 
|Public Finance                        |  | $                               | 13.4 |  |                                | $ | 34.1 |      |  | $ | 46.9 |  |  | $ | 94.0  | 
|Structured Finance                    |  |                                 | 2.0  |  |                                |   | 5.9  |      |  |   | 8.3  |  |  |   | 15.4  | 
|International Finance                 |  |                                 | 14.6 |  |                                |   | 50.3 |      |  |   | 41.2 |  |  |   | 55.7  | 
|                                      |  |                                 |      |  |                                |   |      |      |  |   |      |  |  |   |       | 
|Total net accelerated premiums earned |  | $                               | 30.0 |  |                                | $ | 90.3 |      |  | $ | 96.4 |  |  | $ | 165.1 | 
|                                      |  |                                 |      |  |                                |   |      |      |  |   |      |  |  |   |       | 

Net Investment Income. Net investment income for the three and nine months ended
September 30, 2010 was $69.8 million and $256.4 million, a decrease of 49% from $137.6 million in the three months ended September 30, 2009, and a decrease of 30% from $364.0 million in the nine months ended September 30, 2009. The
declines in net investment income resulted from the lower invested asset base in 2010. Investment income for the three and nine months ended September 30, 2010 also reflected lower average yields than the comparable periods in 2009. The lower
invested asset base in 2010 was driven by reductions in the portfolio to pay commutations on CDO of ABS transactions pursuant to the Settlement Agreement and RMBS claim payments, partially offset by cash flow from the collection of financial
guarantee premiums, tax refunds, fees and coupon receipts on invested assets. The average yield of the portfolio in 2010 declined compared to 2009 as a result of changes in the portfolio mix as well as lower prevailing interest rates. Compared to
2009, the average long-term portfolio mix has shifted away from tax-exempt municipals toward higher yielding taxable municipals and corporate bonds. Floating rate RMBS securities purchased from the investment agreement business and Ambac insured
securities purchased in the open market contributed significantly to investment income in both 2010 and 2009. These assets generally have higher yields than the portfolio as a whole as a result of cost-basis discounts from original purchase
discounts or arising from subsequent impairment write-downs. Investment income related to these RMBS and Ambac insured securities represented a lower percentage of overall investment income for the three and nine months ended September 30, 2010
than the comparable periods in 2009. The lesser impact resulted from sales of certain RMBS and credit impairment of Ambac insured securities in connection with the commencement of the Segregated Account Rehabilitation Proceedings on March 24,
2010. The average book value of lower yielding short-term investments comprised a



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slightly smaller percentage of the portfolio in the three months ended September 30, 2010 compared to third quarter 2009. However, yield comparisons were effected by the higher percentage of
short-term asset in the portfolio for the nine months ended September 30, 2010 compared to the nine months ended September 30, 2009, as the company increased liquidity in anticipation of the CDS Settlement Agreement which closed
June 7, 2010.

Other-Than-Temporary Impairment Losses.Ambac adopted new accounting guidance related to
other-than-temporary impairment losses effective April 1, 2009. Under the new guidance, beginning April 1, 2009, other-than-temporary impairment losses recorded in the statement of operations exclude non-credit related impairment amounts
on securities that are credit impaired to the extent management does not intend to sell and it is not more likely than not that the company will be required to sell before recovery of the amortized cost basis less any current period credit
impairment. Such non-credit related impairment amounts are recorded in other comprehensive income on the balance sheet. Alternatively, the non-credit related impairment would be recorded in other-than-temporary impairment losses in the statement of
operations if management does intend to sell the securities or it is more likely than not the company will be required to sell before recovery of amortized cost less any current period credit impairment. Prior to the adoption of the new
other-than-temporary impairment guidance, the full impairment amount of a security (i.e., the difference between the amortized cost of a security and its fair value) found to be other-than-temporarily impaired would be written-down to fair value
through earnings, including securities that were credit impaired even if management had the intent and ability to hold them to maturity.

Charges for other-than-temporary impairment losses were $6.6 million and $45.4 million for the three and nine months ended September 30, 2010, respectively, a decrease from $32.5 million and $1,452.7
million for the three and nine months ended September 30, 2009, respectively. Other-than-temporary impairments for 2010 reflect charges to write-down structured finance securities to fair value as a result of managements intent to sell
securities to meet liquidity needs as well as credit losses on securities guaranteed by Ambac Assurance. As further described in Note 1 to the Notes to the Unaudited Consolidated Financial Statements located in Item 1 of this Form 10-Q, on
March 24, 2010, the OCI commenced the Segregated Account Rehabilitation Proceedings in order to permit the OCI to facilitate an orderly run-off and/or settlement of the liabilities allocated to the Segregated Account. As a result of actions
taken by the OCI, financial guarantee payments on securities guaranteed by Ambac Assurance which have been placed in the Segregated Account are no longer under the control of Ambac management. Accordingly, estimated cash flows on such securities
have been adversely impacted resulting in credit losses of $6.6 million and $31.4 million for the three and nine months ended September 30, 2010, respectively. As of September 30, 2010, management has not asserted an intent to sell any
securities from its portfolio. Future changes in our estimated liquidity needs could result in a determination that Ambac no longer has the ability to hold such securities, which could result in additional other-than-temporary impairment charges.
Other-than-temporary impairments for 2009 primarily reflect charges to write-down the amortized cost basis of residential mortgage-backed securities that management believed had experienced some credit impairment and/or intended to sell.

Net Realized Investment Gains.The following table provides a breakdown of net realized gains for the three and nine months
ended September 30, 2010 and 2009:



|                                       |  |                                 |     |  |                                |   |      |      |  |   |      |  |  |   |      | 
|-------------------------------------- |  | ------------------------------- | --- |  | ------------------------------ | - | ---- | ---- |  | - | ---- |  |  | - | ---- | 
|                                       |  | Three Months EndedSeptember 30, |     |  | Nine Months EndedSeptember 30, |  
|(Dollars in Millions)                  |  | 2010                            |     |  | 2009                           |   |      | 2010 |  |   | 2009 | 
|Net gains on securities sold or called |  | $                               | 0.9 |  |                                | $ | 86.9 |      |  | $ | 73.9 |  |  | $ | 89.9 | 
|Foreign exchange gains                 |  |                                 | 1.2 |  |                                |   |     |      |  |   | 1.6  |  |  |   | 3.2  | 
|                                       |  |                                 |     |  |                                |   |      |      |  |   |      |  |  |   |      | 
|Total net realized gains               |  | $                               | 2.1 |  |                                | $ | 86.9 |      |  | $ | 75.5 |  |  | $ | 93.1 | 
|                                       |  |                                 |     |  |                                |   |      |      |  |   |      |  |  |   |      | 



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Change in
fair value of credit derivatives.The net change in fair value of credit derivatives was $9.4 million and $44.5 million for the three and nine months ended September 30, 2010, respectively, compared to $2,132.9 million and $3,679.7
million in the three and nine months ended September 30, 2009, respectively.

The net gain on change in fair value of
credit derivatives for the three months ended September 30, 2010 was primarily due to amortization of the par outstanding on the underlying reference obligations and CDS fees earned during the quarter. The net gain for the nine months ended
September 30, 2010 included an increase in the valuation adjustment to reflect Ambacs own credit risk (see Note 11 of the Unaudited Consolidated Financial Statements for a description of the methodology used to determine this credit
valuation adjustment) and gains from increases in reference obligation pricing in asset classes other than CDO of ABS, offset by the recognition of losses related to observable market value movements during the first quarter of $415.9 million on
transactions included in the Settlement Agreement. The net gains on change in fair value of credit derivatives for the three and nine months ended September 30, 2009 were primarily the result of significantly wider Ambac Assurance credit
spreads and improvement in the average pricing level of reference obligations other than CDO of ABS, partially offset by the negative effects of the internal credit rating downgrade of certain CDO of ABS transactions.

Realized gains (losses) and other settlements on credit derivative contracts were $4.9 million and ($2,762.5) million for the three and
nine months ended September 30, 2010, respectively, compared to ($732.9) million and ($731.3) million for the three and nine months ended September 30, 2009, respectively. These amounts represent premiums received and accrued on written
contracts, premiums paid and accrued on purchased contracts and net losses and settlements, including the CDO of ABS Settlement as further discussed in Note 1 to the Unaudited Consolidated Financial Statements, paid and payable where a formal
notification of shortfall has occurred. Net realized gains (losses) for the three and nine months ended September 30, 2010 included $4.9 million and $27.0 million, respectively of net fees earned. Losses and settlements included in net realized
gains (losses) for the three and nine months ended September 30, 2010 were $0.7 million and $2,789.0 million, respectively. Net realized gains (losses) for the three and nine months ended September 30, 2009 included loss and settlement
payments of $745.7 million and $769.5 million respectively. Losses and settlements in all periods presented were associated primarily by various commutations or amendments of CDO of ABS transactions.

Unrealized gains (losses) on credit derivative contracts were $4.6 million and $2,807.0 million in the three and nine months ended
September 30, 2010, respectively, compared to $2,865.8 million and $4,411.0 in the three and nine months ended September 30, 2009, respectively. The net unrealized gains (losses) in fair value of credit derivatives reflect the same factors
as the overall change in fair value of credit derivatives as noted above, adjusted for the reclassification of loss from unrealized to realized losses of $0.7 and $2,789.0 million for the three and nine months ended September 30, 2010,
respectively, and $745.7 million and $769.5 million for the three and nine months ended September 30, 2009 respectively. The 2010 reclassification resulted primarily from the June 7, 2010 Settlement Agreement described above partially
offset by $205.0 million on hedges of CDO of ABS exposures.

As with financial guarantee insurance policies, which are
excluded from fair value accounting under the derivative accounting guidance literature, Ambac performs ongoing surveillance of credit derivatives. Similar to financial guarantee insurance policies, management estimates the amount of credit
impairment at the balance sheet date. However, because credit derivatives are carried at fair value, credit impairment values on credit derivatives are not directly reflected in the GAAP financial statements. During the second quarter 2010, all CDS
contracts that had been on managements adversely classified list were terminated as part of the Settlement Agreement. There are no credit derivative exposures included on managements adversely classified list and no estimated credit
impairment on CDS contracts as of September 30, 2010.



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Other
Income.Other income for the three and nine months ended September 30, 2010 was $186.9 million and $100.7 million, respectively, compared to $268.8 million and $309.8 million for the three and nine months ended September 30, 2009,
respectively. Included within other income are non-investment related foreign exchange gains and losses, deal structuring fees, commitment fees, and reinsurance settlement gains (losses). Other income for the three and nine months ended
September 30, 2010 primarily resulted from the consolidated effect of terminating the reinsurance agreement between Ambac UK and Ambac Assurance for a net gain of $157.8 million. This gain resulted primarily from the recognition of foreign
currency gains that, prior to the termination, were not reflected in certain of Ambac Assurances non-monetary assets or liabilities such as unearned premium reserves or deferred acquisition costs, since these non-monetary assets and
liabilities were required to be recorded based on their historical foreign exchange rates. Additionally, other income for the three and nine months ended September 30, 2010 included the impact of the movement in the British Pound and Euro to US
Dollar exchange rate upon premium receivables, resulting in a gain and loss of approximately $21.6 million and $39.2 million, respectively. Other income for the three and nine months ended September 30, 2009 primarily resulted from the
termination of reinsurance contracts, resulting in net gains of $288.3 million and $299.4 million for the three and nine months ended September 30, 2009, respectively.

Income (loss) on variable interest entities. Income (loss) on variable interest entity activities for the three and nine months ended September 30, 2010 was $26.4 million and ($504.9)
million, respectively, compared with $41.1 million for both the three and nine months ended September 30, 2009. Included within income (loss) on variable interest entities are income statement amounts relating to VIEs consolidated under the
applicable consolidation accounting standards. The income for the three months ended September 30, 2010 reflects an increase in the fair value of VIE net assets, related primarily to revised estimates of future cash payments between the VIEs
and Ambacs insurance subsidiaries, which are eliminated in consolidation, and normal accretion of the time value discount on future cash flows. During the third quarter of 2010, estimated net future cash flows from the VIEs to Ambac under
their financial guarantee contracts increased due to contractual premium rate changes on certain transactions and reduced estimates of guarantee loss payments. These transactions are included in managements adversely classified list and are
expected to require future claims payments under Ambac Assurances financial guarantee policies. Refer to Note 11 of the Consolidated Unaudited Financial Statements included in Part 1 of this Form 10-Q for further information on the impact of
financial guarantee premium and loss payments on the estimated fair value of VIE assets Results for the first nine months of 2010 were also affected by the deconsolidation of many VIEs in March 2010. With the implementation of the new consolidation
standard (ASU 2009-17), Ambac consolidated significantly more VIEs beginning January 1, 2010 (89 VIEs) as compared to 5 VIEs included in first nine month 2009 results, and accordingly amounts reported in 2010 are not comparable to amounts that
were reported in 2009. Further, as a result of the Rehabilitation of the Segregated Account of Ambac Assurance, effective March 24, 2010 Ambac no longer has the unilateral power to direct the activities of certain previously consolidated VIEs
that most significantly impact the VIEs economic performance. Accordingly, Ambac deconsolidated 49 VIEs, mostly RMBS transactions on March 24, 2010. The net loss related to these deconsolidated VIEs for the three and nine months ended
September 31, 2010 was $0.0 million and $495.1 million, respectively. The loss upon deconsolidation primarily arises from re-establishment of the carrying value of insurance loss reserves and other insurance accounts which have an aggregate net
liability balance at March 31, 2010 greater than the aggregate net liabilities of the VIEs which were carried at fair value. In the third quarter 2010, Ambac deconsolidated an additional VIE due to paydown of the VIE guaranteed debt and
associated Ambac financial guarantee policy. The deconsolidation of this VIE did not result in any gain or loss. Refer to Note 3 of the Unaudited Consolidated Financial Statements included in Part 1 of this Form 10-Q for further information on the
accounting for VIEs.



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Losses and
Loss Expenses. Losses and loss expenses are based upon estimates of the aggregate losses inherent in the non-derivative financial guarantee portfolio for insurance policies issued to beneficiaries, including VIEs, for which we do not
consolidate the VIE as of the reporting date. Loss and loss expenses for the three and nine months ended September 30, 2010 were $165.4 million and $577.9 million, respectively, compared to $459.2 million and $2,429.9 for the three and nine
months ended September 30, 2009, respectively. Losses for the three months ended September 30, 2010 were caused by deterioration in certain first-lien RMBS and student loans transactions and increased loss expense estimates related to loss
mitigation and remediation strategies of the RMBS portfolio, partially offset by increased estimates in remediation recoveries on certain RMBS transactions. As a result of the new consolidations standard and the resulting consolidation of certain
RMBS VIEs, ($40.7) million and $153.0 million of additional expected losses were not recognized in losses incurred in the three and nine months ended September 30, 2010; rather, the total income statement results of such VIEs were recorded in
income (loss) on variable interest entities.

The following table summarizes the changes in the total net loss reserves for
the nine months ended September 30, 2010 and the year-ended December 31, 2009:



|                                                                                   |  |                                     |         |   |                              |   |          |  
|---------------------------------------------------------------------------------- |  | ----------------------------------- | ------- | - | ---------------------------- | - | -------- | -
|($ in millions)                                                                    |  | Nine MonthsEnded September 30, 2010 |         |   | YearEnded December 31, 
2009 |  
|Loss reserves at December 31, 2009, net of Subrogation recoverable and reinsurance |  | $                                   | 3,777.3 |   |                              |   |          |  
|Impact of adopting ASU 2009-17(1)                                                  |  |                                     | (503.8  | ) |                              |   |          |  
|                                                                                   |  |                                     |         |   |                              |   |          |  
|Beginning balance of net loss reserves                                             |  |                                     | 3,273.5 |   |                              | $ | 2,469.2  |  
|Provision for losses and loss expenses                                             |  |                                     | 577.9   |   |                              |   | 2,766.6  |  
|Losses paid                                                                        |  |                                     | (335.6  | ) |                              |   | (1,734.3 | )
|Recoveries of losses paid from reinsurers                                          |  |                                     | 10.3    |   |                              |   | 203.6    |  
|Other recoveries, net of reinsurance                                               |  |                                     | 70.1    |   |                              |   | 72.2     |  
|Other adjustments (including foreign exchange)                                     |  |                                     | 3.2     |   |                              |   |         |  
|Deconsolidation of certain VIEs(2)                                                 |  |                                     | 546.7   |   |                              |   |         |  
|                                                                                   |  |                                     |         |   |                              |   |          |  
|Ending balance of net loss reserves                                                |  | $                                   | 4,146.1 |   |                              | $ | 3,777.3  |  
|                                                                                   |  |                                     |         |   |                              |   |          |  



|(1) | Refer to Note 3 of this Unaudited Consolidated Financial Statements for discussion of the new accounting standard.
|--- | ------------------------------------------------------------------------------------------------------------------



|(2) | Relates to VIEs where Ambac no longer has the unilateral power to direct the activities of the VIEs and, accordingly, Ambac deconsolidated the affected VIEs. Included
here are VIEs that have insurance policies that were allocated to the Segregated Account.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The losses and loss
expense reserves as of September 30, 2010 and December 31, 2009 are net of estimated recoveries under representation and warranty breaches for certain RMBS transactions in the amount of $2,395.5 million and $2,026.3 million, respectively.
Please refer to the Critical Accounting Estimates section of this Managements Discussion and Analysis and to Note 5 of the Unaudited Consolidated Financial Statements for further background information on the change in estimated
recoveries.



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The following
tables provide details of net losses paid, net of recoveries received for the nine months ended September 30, 2010 and 2009:



|                      |  |                                           |       |  |                                     |   |       | 
|--------------------- |  | ----------------------------------------- | ----- |  | ----------------------------------- | - | ----- | 
|($ in millions)       |  | Nine
MonthsEnded September 30, 2010(1)(2) |       |  | Nine
MonthsEnded September 30, 2009 |  
|Net losses paid:      |  |                                           |       |  |                                     |   |       | 
|Public Finance        |  | $                                         | 16.4  |  |                                     | $ | 5.9   | 
|Structured Finance    |  |                                           | 214.9 |  |                                     |   | 923.8 | 
|International Finance |  |                                           | 23.8  |  |                                     |   | 42.4  | 
|                      |  |                                           |       |  |                                     |   |       | 
|Total                 |  | $                                         | 255.1 |  |                                     | $ | 972.1 | 
|                      |  |                                           |       |  |                                     |   |       | 



|(1) | As a result of the claim moratorium on the Segregated Account of Ambac Assurance by the Rehabilitator, $1,083.8 million of claims were presented and not paid in the
nine months ended September 30, 2010.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|(2) | Includes cash losses paid plus the fair value of surplus notes issued by the Segregated Account of Ambac Assurance.
|--- | -------------------------------------------------------------------------------------------------------------------

At September 30, 2010, expected future claims to be presented (gross of reinsurance and net of expected recoveries) on credits that
have already defaulted totaled $2,799.5 million. Included therein are amounts of $393.5 million, $476.0 million, $551.2 million, (1,284.3) million and $225.7 million for 2010, 2011, 2012, 2013, and 2014, respectively. These amounts are net of
the previously mentioned representation and warranty breach recoveries totaling $2,503.2 million ($903.8 million and $1,599.4 million in 2011 and 2013, respectively).

Please refer to the Critical Accounting Estimates section of this Managements Discussion and Analysis and to Note 5 of the Unaudited Consolidated Financial Statements for further
background information on loss reserves, our policy and for further explanation of potential changes.

Underwriting and
Operating Expenses. Underwriting and operating expenses for the three and nine months ended September 30, 2010 were $38.0 million and $147.5 million, respectively, an increase of 35.8% from $28.0 million for the three months ended
September 30, 2009 and an increase of 10.5% from $133.5 million for the nine months ended September 30, 2009. The increase in underwriting and operating expenses was primarily due to higher legal fees and premium taxes, partially offset by
lower compensation expenses. Underwriting and operating expenses consist of gross underwriting and operating expenses, plus the amortization of previously deferred expenses and net reinsurance commissions received.

Interest Expense.Interest of $27.5 million and $34.4 million for the three and nine months ended September 30, 2010,
respectively, relates to accrued interest on surplus notes issued by Ambac Assurance in connection with the June 7, 2010 Settlement Agreement with certain Counterparties and the settlement of a Segregated Account policy during the third quarter
of 2010. Please see Note 1 to the Unaudited Consolidated Financial Statements in Item 1 of this Form 10-Q for further discussion of the Surplus Notes issued by Ambac Assurance.

Financial Services:

Through its Financial Services subsidiaries, Ambac
historically provided financial and investment products including investment agreements, funding conduits and derivative products. The primary activities in the derivative products business were intermediation of interest rate and currency swap



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transactions and taking total return swap positions on certain fixed income obligations. As of December 31, 2009 all total return swap positions have been terminated. The derivative
portfolio includes an unhedged Sterling-denominated exposure to consumer price inflation in the United Kingdom. In addition, the derivative products business also uses exchange traded U.S. Treasury futures contracts to hedge interest rate exposures.
Therefore, changes in the relationship between taxable and tax-exempt index and municipal issue specific, as well as between taxable index and Treasury interest rates may result in gains or losses on interest rate swaps. Additionally, beginning in
the third quarter of 2009, the derivative products portfolio retained positive mark-to-market sensitivity to interest rate increases to mitigate floating rate obligations elsewhere in the company, including in the credit derivative and insured
portfolios.

Revenues. The following table provides a breakdown of Financial Services revenues for the three and
nine months ended September 30, 2010 and 2009:



|                                                                      |  |                                  |       |   |                                |   |        |      |  |   |        |   |  |   |        |  
|--------------------------------------------------------------------- |  | -------------------------------- | ----- | - | ------------------------------ | - | ------ | ---- |  | - | ------ | - |  | - | ------ | -
|                                                                      |  | Three Months 
EndedSeptember 30, |       |   | Nine Months
EndedSeptember 30, |  
|($ in millions)                                                       |  | 2010                             |       |   | 2009                           |   |        | 2010 |  |   | 2009   |  
|Investment income                                                     |  | $                                | 8.4   |   |                                | $ | 18.5   |      |  | $ | 26.6   |   |  | $ | 58.3   |  
|Derivative products                                                   |  |                                  | (78.4 | ) |                                |   | (222.5 | )    |  |   | (207.6 | ) |  |   | (280.9 | )
|Other-than-temporary impairment losses                                |  |                                  |      |   |                                |   | (11.7  | )    |  |   | (3.1   | ) |  |   | (283.9 | )
|Net realized investment (losses) gains                                |  |                                  | 0.5   |   |                                |   | 28.1   |      |  |   | 67.7   |   |  |   | 142.3  |  
|Net change in fair value of total return swaps                        |  |                                  |      |   |                                |   | 6.9    |      |  |   |       |   |  |   | 18.6   |  
|Net mark-to-market gains (losses) on non-trading derivative contracts |  |                                  |      |   |                                |   | (6.9   | )    |  |   | (14.3  | ) |  |   | 0.8    |  
|                                                                      |  |                                  |       |   |                                |   |        |      |  |   |        |   |  |   |        |  
|Total Financial Services revenue                                      |  | $                                | (69.5 | ) |                                | $ | (187.6 | )    |  | $ | (130.7 | ) |  | $ | (344.8 | )
|                                                                      |  |                                  |       |   |                                |   |        |      |  |   |        |   |  |   |        |  

Investment Income. The decrease in investment income for the three and nine months ended
September 30, 2010 was driven primarily by a smaller portfolio of investments in the investment agreement business. The portfolio decreased significantly, primarily as a result of sales of securities to fund repayment of investment agreements
as Ambacs investment agreement obligations were reduced from $1.4 billion at September 30, 2009 to $0.9 billion at September 30, 2010.

Derivative Products. The decreased losses in derivative product revenues for the three months ended September 30, 2010 compared to the three months ended September 30, 2009
resulted primarily from significant termination losses and associated fair value adjustments which increased derivative liabilities in the third quarter of 2009, partially offset by lower mark-to-market losses in the third quarter of 2010
caused by declining interest rates during the period compared to the third quarter of 2009. Losses in derivative product revenues for the nine months ended September 30, 2010 were lower than for the comparable period of 2009 as a result of
lower termination losses and positive valuation adjustments related to Ambacs own credit risk, partially offset by higher mark-to-market losses caused by declining interest rates during the period.

Termination fees generally reflect the counterparties cost to replace Ambac on their swaps. These fees are realized upon the swap
counterparties exercise of termination rights allowed by Ambac Assurances rating downgrades or upon negotiated settlements. The results for the three and nine months ended September 30, 2010 and 2009 also include fair value
adjustments to reflect estimated swap replacement costs in the current market for swaps that remain in the portfolio. Losses arising from the excess of termination fees over mid-market swap values, including fair value adjustments on swaps remaining
in the portfolio, totaled $0.2 million and $141.0 million for the three months ended September 30, 2010 and 2009, respectively. These termination related losses were $49.8 million and $204.6 million for the nine months ended September 30,
2010 and 2009, respectively. Many derivative counterparties retain the right to terminate contracts. The value of future terminations cannot be determined with certainty until such terminations occur. Accordingly, further termination losses may
occur in the future.



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Beginning in the
third quarter of 2009, Ambacs financial services subsidiaries retained positive mark-to-market sensitivity to interest rate increases in the interest rate derivative portfolio and wrote offsetting intercompany swaps as a hedge against the
floating rate exposure in the Financial Guarantee segment. This additional interest rate sensitivity resulted in losses of $93.2 million and $67.3 million included in derivative product results for the three months ended September 30, 2010 and
2009, respectively; and $263.4 million and $66.2 million for the nine months ended September 30, 2010 and 2009, respectively.

Other-Than-Temporary Impairment Losses. Charges for other-than-temporary impairment losses in the financial services investment portfolios were $0.0 million and $3.1 million for the three
and nine months ended September 30, 2010, respectively, a decrease from $11.7 million and $283.9 million for the three and nine months ended September 30, 2009, respectively. Losses in 2009 are the result of write-downs on Alt-A
residential mortgage backed securities held in the investment agreement investment portfolio that management believed had experienced some credit impairment and/or intended to sell.

Net Realized Investment Gains.The following table details amounts included in net realized investment gains for the three
and nine months ended September 30, 2010 and 2009:



|                                                  |  |                                 |     |  |                                 |   |      |      |  |   |      |   |  |   |       | 
|------------------------------------------------- |  | ------------------------------- | --- |  | ------------------------------- | - | ---- | ---- |  | - | ---- | - |  | - | ----- | 
|                                                  |  | Three Months EndedSeptember 30, |     |  | Nine Months 
EndedSeptember 30, |  
|(Dollars in Millions)                             |  | 2010                            |     |  | 2009                            |   |      | 2010 |  |   | 2009 |  
|Net gains (losses) on securities sold or called   |  | $                               | 0.5 |  |                                 | $ | 28.0 |      |  | $ | (5.8 | ) |  | $ | 21.4  | 
|Net gains on termination of investment agreements |  |                                 |    |  |                                 |   | 0.1  |      |  |   | 73.5 |   |  |   | 120.9 | 
|                                                  |  |                                 |     |  |                                 |   |      |      |  |   |      |   |  |   |       | 
|Total net realized gains                          |  | $                               | 0.5 |  |                                 | $ | 28.1 |      |  | $ | 67.7 |   |  | $ | 142.3 | 
|                                                  |  |                                 |     |  |                                 |   |      |      |  |   |      |   |  |   |       | 

Net Change in Fair Value of Total Return Swap Contracts. During 2009, Ambac terminated all
remaining total return swaps. Net change in fair value of total return swaps resulted in gains of $6.9 million and $18.6 million for the three and nine months ended September 30, 2009, respectively. Results for 2009 reflect general credit
spread tightening on the reference obligation bonds underlying the total return swaps.

Expenses.Expenses for
the three and nine months ended September 30, 2010 were $7.4 million and $24.0 million, respectively, down 24% from $9.7 million in the three months ended September 30, 2009 and down xx% from $38.3 million in the nine months ended
September 30, 2009. These declines stemmed primarily from reductions in interest expenses on outstanding investment agreements as the portfolio declined from $1.4 billion to $0.9 billion at September 30, 2009 and 2010, respectively.

Corporate and Other:

On July 16, 2010, Ambac completed the sale of its advisory services subsidiary, RangeMark Financial Services, Inc. (RangeMark) to the management of RangeMark, resulting in a loss of $0.5
million. Ambac will continue to contract with RangeMark for certain valuation services for a period of time. In October 2010, Ambac (Bermuda) Ltd. (ABL) requested and received permission from the Bermuda Monetary Authority to cancel
ABLs registration as a class 3 Bermuda Insurer. After approval of this application by the Bermuda Monetary Authority, $36.5 million was returned to Ambac.



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Other
Income. Other income for the three and nine months ended September 30, 2010 was $0.1 million and $1.6 million, respectively, compared to $1.1 million and $33.3 million for the three and nine months ended September 30, 2009,
respectively. Included with other income are (i) investment income from corporate investments, and (ii) RangeMark investment advisory, consulting and research services (prior to the sale in July 2010). Other income for the quarter and
year-to-date ended September 30, 2009 primarily resulted from income generated from a VIE consolidated in 2009.

Net Realized (Losses)/Gains. Net realized (losses) gains for the three and nine months ended September 30 2010, were
($0.5) and $10.2 million, respectively. The net realized loss of ($0.5) million for the third quarter of 2010 represented the loss of the sale of RangeMark. Also included in the nine months ended September 30, 2010 are gains of $10.7 million
from the extinguishment of $20.3 million of Ambacs 9.375% debentures, due August 2011. These Ambac debentures were acquired when Ambac entered into a series of debt for equity exchanges with certain holders of Ambacs common stock. Ambac
recognized a gain on the extinguishment of these, debentures which was the difference between the fair value of the new shares issued less than the net carrying value of the debentures.

Interest Expense.Interest expense for the three and nine months ended September 30, 2010 was $29.9 million and $89.6
million, respectively, flat compared to $29.9 million and $89.6 million in the three and nine months ended September 30, 2009, respectively.

Corporate Expense. Corporate expense for the three and nine months ended September 30, 2010 was $13.7 million and $38.3 million, respectively, an increase of $7.7 million from $6.0
million for the three months ended September 30, 2009 and an increase of $31.6 million from $6.7 million in the nine months ended September 30, 2009. The increases are due to higher legal expenses, litigation provision, and the inclusion
of RangeMark operating expenses of $0.1 million and $8.6 million for the three and nine months ended September 30, 2010, respectively. Additionally, we recorded a goodwill impairment of $4.0 million relating to Ambacs investment in Range
mark in the first nine months of 2010.

Provision for Income Taxes.Income taxes for the three and nine months
ended September 30, 2010 were at an effective rate of 00.0% and 00.0%, respectively, compared to (1.6%) and (189.7%) for the three and nine months ended September 30, 2009, respectively. The increase in the effective tax rates
for 2009 relates predominantly to the set up of a full deferred tax valuation allowance against ordinary losses. See Critical Accounting Estimates  Valuation Allowance on Deferred Tax Assets for further information.

Ambac Assurance Statutory Basis Results. Ambac Assurances statutory financial statements are prepared on the basis of
accounting practices prescribed or permitted by the OCI. OCI recognizes only statutory accounting practices prescribed or permitted by the State of Wisconsin for determining and reporting the financial condition and results of operations of an
insurance company for determining its solvency under Wisconsin Insurance Law. The National Association of Insurance Commissioners (NAIC) Accounting Practices and Procedures manual (NAIC SAP) has been adopted as a component of
prescribed practices by the State of Wisconsin.

As noted above in the Recent Developments section of Note 1 to
the Unaudited Consolidated Financial Statements, on March 24, 2010, Ambac Assurance acquiesced to the request of OCI to establish a Segregated Account. Under Wisconsin insurance law, the Segregated Account is a separate insurer from Ambac
Assurance and accordingly is subject to all of the filing and statutory reporting requirements of Wisconsin domiciled insurers. The purpose of the Segregated Account is to segregate certain segments of Ambac Assurances liabilities. The total
assets, total liabilities, and total surplus of the Segregated Account are reported as discrete components of Ambac Assurances assets, liabilities, and surplus reported in Ambac Assurances statutory basis financial statements.



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As of
September 30, 2010, Ambac Assurance reported statutory capital and surplus of approximately $911.9 million, compared to $801.9 million as of December 31, 2009. Ambac Assurances statutory financial statements include the results of
Ambac Assurances general account, the Segregated Account which was formed on March 24, 2010, as well as Ambac Assurances equity investment in its subsidiaries. Statutory capital and surplus was positively impacted by the various
commutations during the period, primarily the June 7, 2010 CDO of ABS settlement. Consideration for these settlements included both Surplus Notes of Ambac Assurance or the Segregated Account of Ambac Assurance and cash. As prescribed by OCI,
the Surplus Notes are included in Ambac Assurance and the Segregated Account of Ambac Assurances statutory surplus at their par value. At September 30, 2010 Ambac Assurance has no remaining statutory impairments on its credit derivative
portfolio.

Ambac Assurance recorded a statutory net loss for the nine months ended September 30, 2010. The primary
drivers of the statutory net loss were (i) statutory loss and loss expenses related primarily to Ambac Assurances RMBS financial guarantee portfolio for both initial defaults and continued deterioration in previously defaulted credits;
(ii) impairment losses related to Ambac Assurances CDO of ABS transactions which were commuted during the second quarter of 2010; and (iii) impairment losses within Ambac Assurances investment portfolio driven by reduced
pricing on certain previously impaired RMBS securities. These negative drivers were partially offset by (i) revenues (primarily premiums earned and investment income) generated during the period and (ii) the net income impact relating to
the commutation of the assumed reinsurance agreement with Ambac UK.

Statutory surplus is sensitive to: (i) further
credit deterioration on the insured portfolio, (ii) first time payment defaults of insured obligations, which increases loss reserves, (iii) commutations of insurance policies or credit derivative contracts at amounts that differ from the
amount of liabilities recorded, (iv) reinsurance contract terminations at amounts that differ from net assets recorded, (v) reductions in the fair value of previously impaired investments or additional downgrades of the ratings on
investment securities to below investment grade by the independent rating agencies, (vi) settlements of representation and warranty breach claims at amounts that differ for amounts recorded, or failures to collect such amounts,
(vii) approval of the Plan of Rehabilitation and the issuance of Segregated Account Surplus Notes in settlement of presented and unpaid claims of the Segregated Account and (viii) defaults by reinsurers.

The significant differences from U.S. GAAP are that under SAP:



| |  |  | Loss reserves are only established for losses on guaranteed obligations that have already defaulted in an amount that is sufficient to cover the
present value of the anticipated defaulted debt service payments over the expected period of default, less estimated recoveries under subrogation rights (currently discounted at 5.10% as prescribed by OCI). Under U.S. GAAP, in addition to the
establishment of loss reserves for defaulted obligations, loss reserves are established (net of U.S GAAP basis unearned premium reserves) for obligations that have experienced credit deterioration, but have not yet defaulted using a risk-free
discount rate, currently at 2.26%.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Mandatory contingency reserves are required based upon the type of obligation insured, whereas U.S. GAAP does not require such a reserve. Releases of
the contingency reserves are subject to OCI approval and relate to a determination that the held reserves are deemed excessive.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | Investment grade fixed income investments are stated at amortized cost and below investment grade fixed income investments are reported at the lower of
amortized cost or fair value. Under U.S. GAAP, all bonds are reported at fair value.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Wholly owned subsidiaries are not consolidated; rather, the equity basis of accounting is utilized and the carrying values of these investments are
subject to an admissibility test and permitted accounting practices. When Ambac Assurances share of the subsidiaries losses exceeds the related carrying amounts of the wholly owned subsidiary, Ambac Assurance discontinues applying the
equity method and the investment is reduced to zero. For those subsidiaries that have insufficient claims paying resources and the obligations are guaranteed by Ambac Assurance, Ambac Assurance records an estimated impairment loss for probable
losses which are in excess of the subsidiaries claims paying resources. Under U.S. GAAP, credit derivatives are recorded at fair value, which is impacted by market valuations of the CDO exposures and includes the effect of Ambac
Assurances own credit default swap spreads in the measurement. This mark-to-market valuation often differs significantly from the statutory measure of impairment discussed above.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Variable interest entities (VIE) are not required to be assessed for consolidation. Under U.S. GAAP, a reporting entity that has both the following
characteristics is required to consolidate the VIE: a) the power to direct the activities of the VIE that most significantly impact the VIEs economic performance; and b) the obligation to absorb losses of the VIE that could potentially be
significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. With regard to issuance of a financial guarantee insurance policy, Ambac generally has the obligation to absorb losses of VIEs
that could potentially be significant to the VIE as the result of its guarantee of insured obligations issued by VIEs.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | As a result of a prescribed practice by OCI, Surplus Notes are included in Surplus at an amount equal to par regardless of the admitted assets received
in consideration for issuance of the notes. Under US GAAP, surplus note are included in long-term debt obligations recorded at their estimated fair value and accrete up to face value via the effective interest method. | 
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 



| |  |  | Upfront premiums written are earned on a basis proportionate to the remaining scheduled debt service to the original total principal and interest
insured. Installment premiums are reflected in income pro rata over the period covered by the premium payment. Under U.S. GAAP, premium revenues for both upfront and installment premiums are earned over the life of the financial guarantee contract
in proportion to the insured principal amount outstanding at each reporting date.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Costs related to the acquisition of new business are expensed as incurred, whereas under U.S. GAAP, the related costs are expensed over the periods in
which the related premiums are earned; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Deferred tax assets are reduced by a statutory valuation allowance if it is more likely than not that some or all of the deferred tax asset will not be
realized; any remaining net deferred tax asset is then subject to an admissibility test; whereas US GAAP only requires a valuation allowance if it is more likely than not that the deferred tax asset will not be realized.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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Liquidity and
Capital Resources

Ambac Financial Group, Inc. Liquidity. The matters described herein, to the extent that
they relate to future events or expectations, may be significantly affected by Ambacs Chapter 11 Bankruptcy filing. The Chapter 11 Filing involves various restrictions on our activities, limitations on financing and the need to obtain
Bankruptcy Court approval for various matters. As a result of the risks and uncertainties associated with the Chapter 11 Bankruptcy Filing, the value of our debt and securities is highly speculative. We urge that appropriate caution be exercised
with respect to existing and future investments in any of the debt or other securities of Ambac. We believe the consummation of a successful restructuring under Chapter 11 of the Bankruptcy Code is critical to our continued viability and long term
liquidity.

Ambacs liquidity and solvency, both on a near-term basis (for the next twelve months) and a long-term basis,
is largely dependent upon: (i) Ambac Assurances ability to pay dividends; (ii) cash on hand, including the $36.5 million of capital returned from Ambac (Bermuda) Ltd in October 2010; (iii) external financing; (iv) the level
of costs associated with the reorganization and (iv) the value of Ambac Assurance.

Based on the holdings of cash and
investments management believes that Ambac will have sufficient liquidity to finance the cost of bankruptcy proceedings and a few years of operations post emergence from bankruptcy. However, no guarantee can be given that Ambac will have
sufficient liquidity to finance its bankruptcy costs and/or emerge from bankruptcy with sufficient liquidity to operate over the long term. Ambacs ability to satisfy its liquidity needs in bankruptcy and post emergence from bankruptcy
will largely depend on its ability to timely and efficiently reach final agreement with major creditor groups concerning a plan of reorganization.

Ambac did not pay any dividends on its common stock in the nine months ended September 30, 2010.

Ambac Assurance Liquidity. Ambac Assurances liquidity on a long-term basis is dependent on receipt of installment premiums on existing financial guarantees, principal and interest cash
flows from investments, and the amount of required loss and commutation payments on both insurance and credit derivative contracts. The principal sources of Ambac Assurances liquidity are gross installment premiums on insurance and credit
default swap contracts, investment coupon receipts, scheduled investment maturities, sales of investment securities, repayment of affiliate loans, claim recoveries from reinsurers, RMBS subrogation recoveries and tax refunds. In 2010, Ambac
Assurance received $443.9 million from tax refunds under the Worker, Homeownership and Business Assistance Act of 2009. The principal uses of Ambac Assurances liquidity are the payment of operating expenses, loss and commutation payments on
both insurance and credit derivative contracts, reinsurance premiums, and additional loans to affiliates. As a result of the Segregated Account Rehabilitation Plan, claim payments on policies allocated to the Segregated Account are not expected to
be paid until the Segregated Account Rehabilitation Plan is approved. Insurance claims presented, during the period March 24, 2010 up to and including September 30, 2010, of $1,083.8 million for policies allocated to the Segregated Account
have not yet been paid. If the Segregated Account Rehabilitation Plan as filed by the Rehabilitator on October 8, 2010 is confirmed by the Wisconsin courts, 25% of such claims presented will be paid in cash and 75% in Segregated Account Surplus
Notes.

Our ability to recover the RMBS subrogation recoveries is subject to significant uncertainty, including risks inherent
in litigation, collectability of such amounts from counterparties (and/or their respective parents and affiliates), timing of receipt of any such recoveries, regulatory intervention which could impede our ability to take actions required to realize
such recoveries and uncertainty inherent in the



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assumptions used in estimating such recoveries. Our current estimate considers that we will receive subrogation recoveries of $903.8 million and $1,599.5 million in 2011 and 2013, respectively.
The amount of these subrogation recoveries is significant and if were unable to recover any amounts our future available liquidity to pay claims would be reduced.

An affiliate of Ambac provides a $360 million liquidity facility to a reinsurance company which acts as reinsurer with respect to a portfolio of life insurance policies. The liquidity facility, which is
guaranteed by Ambac Assurance, provides temporary funding in the event that the reinsurance companys capital is insufficient to make payments under the reinsurance agreement. The reinsurance is required to repay all amounts drawn under the
liquidity facility. At September 30, 2010, $8.8 million was drawn on this liquidity facility; at September 30, 2010 the undrawn balance of the liquidity facility was $351.2 million.

Ambac and its affiliates participate in leveraged lease transactions with municipalities, utilities and quasi-governmental agencies
(collectively lessees), either directly or through various affiliated companies. Assets underlying these leveraged lease transactions involve equipment and facilities used by the lessees to provide basic public services such as mass
transit and utilities. Ambac and its affiliates may provide one or more of the following financial products in these transactions: (i) credit default swaps, (ii) guarantees of the lessees termination payment obligations,
(iii) loans, and (iv) investment agreements and payment agreements, both of which serve as collateral to economically defease portions of the lessees payment obligations in respect of termination payments.

These transactions expose Ambac to the following risks:



| |  |  | Collateral posting requirements due to Ambac Assurance rating downgrade triggering events under certain agreements.
| | - |  | -------------------------------------------------------------------------------------------------------------------



| |  |  | As a consequence of Ambac Assurances ratings downgrades, in some of the transactions the lessees are currently obligated to replace Ambac
Assurance as credit enhancer, subject to waivers granted by the lessors. Failure of the waivers to be renewed followed by a failure to replace Ambac could result in a lease event of default and the requirement for a lessee to make a termination
payment upon a demand by the lessor. Portions of any termination payments may be funded from the liquidation of the related defeasance collateral (i.e. payment agreements, investment agreements and/or other securities). To the extent a lessee fails
to make a required termination payment, Ambac may be required to make a surety bond payment, or a swap settlement, under its guarantee policy or credit default swap, as applicable. The payment required under the Ambac credit enhancement will be
based on the difference between the termination amount and the value derived from the defeasance collateral. Following a payment, Ambac would then be entitled to settle a credit default swap with the lessee or exercise its reimbursement rights
against the lessee. In such circumstances Ambac, through subrogation or ownership in the leased assets, would have the right, along with other remedies, to liquidate the leased assets.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

At September 30, 2010, Ambacs aggregate financial enhancement exposure related to leveraged lease transactions that contain
Ambac rating downgrade triggering events at September 30, 2010 is $613 million. Ambacs exposure to these termination or swap settlement payments, net of defeasance collateral, is $473 million.

As a result of Ambacs credit rating downgrades, nine lessees in these transactions may be required to replace Ambac as financial
enhancement provider if waivers granted by the lessors are not renewed. There are three additional lessees that could be required to replace Ambac as financial



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enhancement provider in certain circumstances. In one case, Ambacs replacement could be required upon the withdrawal of the guarantee provided by the lessees municipal owner. In
another case, Ambacs replacement could be required upon the rating downgrade of the second guarantor below a threshold level. In the third case, Ambacs replacement could be required if the lessee withdrew additional collateral it has
pledged to the lessor.

Ambac Assurance elected to defer dividend payments on its Auction Market Preferred Securities for
dividend payment dates subsequent to January 15, 2010.

Financial Services Liquidity.The principal uses of
liquidity by Financial Services subsidiaries are payments on investment and payment agreement obligations; payments on intercompany loans; payments under interest rate and currency swaps; collateral posting; and operating expenses. Management
believes that its Financial Services short and long-term liquidity needs can be funded from net investment income; the maturity of invested assets; sales of invested assets; intercompany loans from Ambac Assurance; and receipts from interest rate
and currency swaps.

Investment agreements subject Ambac to liquidity risk associated with unanticipated withdrawals of
principal as allowed by the terms of certain contingent withdrawal investment agreements, including those issued to entities that provide credit protection with respect to collateralized debt obligations. These entities issue credit linked-notes,
invest a portion of the proceeds in the contingent withdrawal investment agreements and typically sell credit protection by issuing a credit default swap referencing specified asset-backed or corporate securities. Upon a credit event of one of the
underlying reference obligations, the issuer may need to draw on the investment agreement to pay under the terms of the credit default swap. Accordingly, these investment agreements may be drawn prior to our original expectations, resulting in an
unanticipated withdrawal. As of September 30, 2010, $0.6 billion of contingent withdrawal investment agreements issued to CDOs remained outstanding, of which $0.02 billion were related to CDOs with primarily RMBS underlying collateral. To
manage the liquidity risk of unscheduled withdrawals, Ambac utilizes several tools, including regular surveillance of the related transactions. This surveillance process is customized for each investment agreement transaction and includes a review
of past activity, recently issued trustee reports, reference name performance characteristics and third party tools to analyze early withdrawal risk.

Credit Ratings and Collateral. The significant rating downgrades of Ambac Assurance by both Moodys and S&P resulted in the triggering of required cure provisions in nearly all of
the investment agreements issued by Ambac Capital Funding, Inc. Most investment agreements contain multiple possible remedies, including collateral posting; a termination of the investment agreement contract, both of which demand significant
liquidity; or the designation of a replacement guarantor. In most cases Ambac is permitted to select the remedy and, therefore, may post collateral or otherwise enhance its credit, prior to an actual draw on the investment agreement.

Before selecting a course of action, Ambac evaluated its options based on the contractual terms of each investment agreement. Issues
considered in making these decisions included the detailed collateral posting provisions (collateral type, posting amount), investment agreement characteristics (yield, tenor, expected and potential draw profile), as well as the characteristics of
the related investment portfolio. In many cases, Ambac chose to terminate investment agreements, particularly when it was able to do so at levels that resulted in meaningful discounts to book value. In addition, Ambac has posted collateral of $966.2
million in connection with its outstanding investment agreements, including accrued interest, at September 30, 2010.



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Ambac Financial
Services, LLC provided interest rate and currency swaps for states, municipalities, asset-backed issuers and other entities in connection with their financings. Ambac Financial Services hedges most of the related interest rate and currency risks of
these instruments with standardized derivative contracts, which include collateral support agreements. Under these agreements, Ambac Financial Services is required to post collateral to a swap dealer to cover unrealized losses. In addition, Ambac
Financial Services is often required to post collateral in excess of the amounts needed to cover unrealized losses, often referred to as an independent amount. The downgrades of Ambac Assurance in 2009 triggered additional termination events which
in some cases have resulted in additional collateral requirements and/or termination payments on Ambacs Financial Services products. All Ambac Financial Services derivative contracts possessing rating-based downgrade triggers that could result
in collateral posting or a termination have been triggered. If terminations were to occur, it would generally result in a return of collateral to Ambac Financial Services in the form of cash, U.S. Treasury or U.S. government agency obligations with
market values approximately equal to or in excess of market values of the swaps. In most cases, Ambac Financial Services will look to re-establish the hedge positions that are terminated early. This may result in additional collateral posting
obligations or the use of futures contracts or other derivative instruments which could require Ambac Financial Services to post margin amounts. The amount of additional collateral required or margin posted on futures contracts will depend on
several variables including the degree to which counterparties exercise their termination rights and the ability to replace these contracts with existing counterparties under existing documents and credit support arrangements. All contracts that
require collateral posting are currently collateralized. Collateral posted by Ambac Financial Services totaled $272.8 million, including independent amounts, under these contracts at September 30, 2010.

Additionally, Ambac Financial Services hedges part of its interest rate risk with financial futures contracts. This requires it to post
margin with its futures clearing merchant. On September 30, 2010 this amount was $13.6 million.

Ambac Credit Products
enters into credit derivative contracts. Ambac Credit Products was not required to post collateral under any of its contracts.

Balance Sheet.In 2010, total assets increased by approximately $12.4 billion, driven by (i) the changes to assets of
consolidated variable interest entities ($15.9 billion); (ii) installment premium receipts on insurance and credit derivative transactions; and (iii) coupon payments on investment securities, partially offset by commutation payments,
including the Settlement Agreement ($2.6 billion). As of September 30, 2010, stockholders deficit was $1.22 billion, as compared to $1.63 billion deficit at December 31, 2009. This change was primarily caused by improvements in fair
value of investment securities during the period.

Investment Portfolio.Ambac Assurances investment
objectives for the Financial Guarantee portfolio are to achieve the highest after-tax return on a diversified portfolio of fixed income investments while protecting claims-paying resources and satisfying liquidity needs. The Financial Guarantee
investment portfolio is subject to internal investment guidelines. Such guidelines set forth minimum credit rating requirements and credit risk concentration limits.

The Financial Services investment portfolio consists primarily of assets funded with proceeds from the issuance of investment agreement liabilities. The investment objectives are to (i) maintain
sufficient liquidity to satisfy scheduled and unscheduled investment agreement maturities and withdrawals, and (ii) protect Ambac Assurances claims-paying resources while maximizing investment earnings relative to the cost of liabilities.
The investment portfolio is subject to internal investment guidelines. Such guidelines set forth minimum credit rating requirements and credit risk concentration limits.



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The amortized cost
and estimated fair value of investments in fixed income securities and short-term investments, excluding VIE fixed income securities, at September 30, 2010 and December 31, 2009 were as follows:



|                                               |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|---------------------------------------------- |  | ------------------ | ------- |  | ------------------- | - | ------- | ------------- |  | - | ------------------- |  |  | - | ------- | 
|                                               |  | September 30, 2010 |         |  | December 31, 2009   |  
|($ in millions)                                |  | AmortizedCost      |         |  | EstimatedFair Value |   |         | AmortizedCost |  |   | EstimatedFair Value | 
|Fixed income securities:                       |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|Municipal obligations                          |  | $                  | 2,064.0 |  |                     | $ | 2,190.5 |               |  | $ | 3,103.8             |  |  | $ | 3,205.5 | 
|Corporate obligations                          |  |                    | 893.2   |  |                     |   | 931.7   |               |  |   | 859.8               |  |  |   | 841.2   | 
|Foreign obligations                            |  |                    | 114.1   |  |                     |   | 121.1   |               |  |   | 158.5               |  |  |   | 167.7   | 
|U.S. government obligations                    |  |                    | 165.3   |  |                     |   | 174.8   |               |  |   | 230.6               |  |  |   | 233.4   | 
|U.S. agency obligations                        |  |                    | 82.0    |  |                     |   | 90.2    |               |  |   | 68.7                |  |  |   | 73.5    | 
|Residential mortgage-backed securities         |  |                    | 1,236.3 |  |                     |   | 1,447.7 |               |  |   | 1,644.5             |  |  |   | 1,738.8 | 
|Collateralized debt obligations                |  |                    | 41.5    |  |                     |   | 28.2    |               |  |   | 79.1                |  |  |   | 56.4    | 
|Other asset-backed securities                  |  |                    | 1,002.6 |  |                     |   | 983.8   |               |  |   | 1,460.4             |  |  |   | 1,256.0 | 
|Short-term                                     |  |                    | 617.8   |  |                     |   | 617.8   |               |  |   | 962.0               |  |  |   | 962.0   | 
|Other                                          |  |                    | 0.1     |  |                     |   | 0.1     |               |  |   | 1.3                 |  |  |   | 1.3     | 
|                                               |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|                                               |  |                    | 6,216.9 |  |                     |   | 6,585.9 |               |  |   | 8,568.7             |  |  |   | 8,535.8 | 
|                                               |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|Fixed income securities pledged as collateral: |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|U.S. government obligations                    |  |                    | 181.4   |  |                     |   | 184.8   |               |  |   | 122.2               |  |  |   | 123.1   | 
|U.S. agency obligations                        |  |                    |        |  |                     |   |        |               |  |   | 16.8                |  |  |   | 17.4    | 
|Residential mortgage-backed securities         |  |                    | 9.1     |  |                     |   | 9.6     |               |  |   | 25.4                |  |  |   | 26.9    | 
|                                               |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|                                               |  |                    | 190.5   |  |                     |   | 194.4   |               |  |   | 164.4               |  |  |   | 167.4   | 
|                                               |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 
|Total                                          |  | $                  | 6,407.4 |  |                     | $ | 6,780.3 |               |  | $ | 8,733.1             |  |  | $ | 8,703.2 | 
|                                               |  |                    |         |  |                     |   |         |               |  |   |                     |  |  |   |         | 



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The following
table represents the fair value of mortgage and asset-backed securities, excluding VIE mortgage and asset-backed securities, at September 30, 2010 and December 31, 2009 by classification:



|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|---------------------------------------------- |  | ------------------ | ------- |  | ----------------- | - | ------- | --------- |  | - | ----- |  |  | - | ------- | 
|($ in millions)                                |  | FinancialGuarantee |         |  | FinancialServices |   |         | Corporate |  |   | Total | 
|September 30, 2010:                            |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Residential mortgage-backed securities:        |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|RMBS  First-lien  Alt-A                      |  | $                  | 507.7   |  |                   | $ | 244.4   |           |  | $ |      |  |  | $ | 752.1   | 
|U.S. Government Sponsored Enterprise Mortgages |  |                    | 132.4   |  |                   |   | 303.2   |           |  |   |      |  |  |   | 435.6   | 
|RMBS  Second Lien                             |  |                    | 182.2   |  |                   |   |        |           |  |   |      |  |  |   | 182.2   | 
|RMBS  First Lien  Sub Prime                  |  |                    | 69.6    |  |                   |   |        |           |  |   |      |  |  |   | 69.6    | 
|Government National Mortgage Association       |  |                    | 4.2     |  |                   |   | 7.2     |           |  |   |      |  |  |   | 11.4    | 
|RMBS  First Lien  Prime                      |  |                    | 6.4     |  |                   |   |        |           |  |   |      |  |  |   | 6.4     | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Total residential mortgage-backed securities   |  |                    | 902.5   |  |                   |   | 554.8   |           |  |   |      |  |  |   | 1,457.3 | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Other asset-backed securities                  |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Military Housing                               |  |                    | 388.9   |  |                   |   |        |           |  |   |      |  |  |   | 388.9   | 
|Credit Cards                                   |  |                    |        |  |                   |   | 274.4   |           |  |   |      |  |  |   | 274.4   | 
|Structured Insurance                           |  |                    | 115.6   |  |                   |   |        |           |  |   |      |  |  |   | 115.6   | 
|Auto                                           |  |                    |        |  |                   |   | 63.8    |           |  |   |      |  |  |   | 63.8    | 
|Student Loans                                  |  |                    | 16.0    |  |                   |   | 38.4    |           |  |   |      |  |  |   | 54.4    | 
|Other                                          |  |                    | 86.7    |  |                   |   |        |           |  |   |      |  |  |   | 86.7    | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Total other asset-backed securities            |  |                    | 607.2   |  |                   |   | 376.6   |           |  |   |      |  |  |   | 983.8   | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Total                                          |  | $                  | 1,509.7 |  |                   | $ | 931.4   |           |  | $ |      |  |  | $ | 2,441.1 | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|December 31, 2009                              |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Residential mortgage-backed securities:        |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|RMBS  First-lien  Alt-A                      |  | $                  | 701.8   |  |                   | $ | 214.9   |           |  | $ |      |  |  | $ | 916.7   | 
|U.S. Government Sponsored Enterprise Mortgages |  |                    | 157.3   |  |                   |   | 379.8   |           |  |   |      |  |  |   | 537.1   | 
|RMBS  Second Lien                             |  |                    | 200.6   |  |                   |   |        |           |  |   |      |  |  |   | 200.6   | 
|RMBS  First Lien  Sub Prime                  |  |                    | 47.2    |  |                   |   |        |           |  |   |      |  |  |   | 47.2    | 
|Government National Mortgage Association       |  |                    | 4.9     |  |                   |   | 41.9    |           |  |   |      |  |  |   | 46.8    | 
|RMBS  First Lien  Prime                      |  |                    | 17.3    |  |                   |   |        |           |  |   |      |  |  |   | 17.3    | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Total residential mortgage-backed securities   |  |                    | 1,129.1 |  |                   |   | 636.6   |           |  |   |      |  |  |   | 1,765.7 | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Other asset-backed securities                  |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Military Housing                               |  |                    | 362.9   |  |                   |   |        |           |  |   |      |  |  |   | 362.9   | 
|Student Loans                                  |  |                    | 178.6   |  |                   |   | 100.1   |           |  |   |      |  |  |   | 278.7   | 
|Credit Cards                                   |  |                    | 62.0    |  |                   |   | 277.6   |           |  |   |      |  |  |   | 339.6   | 
|Structured Insurance                           |  |                    | 126.0   |  |                   |   |        |           |  |   |      |  |  |   | 126.0   | 
|Auto                                           |  |                    |        |  |                   |   | 47.0    |           |  |   |      |  |  |   | 47.0    | 
|Aircraft securitizations                       |  |                    | 5.2     |  |                   |   |        |           |  |   |      |  |  |   | 5.2     | 
|Other                                          |  |                    | 96.6    |  |                   |   |        |           |  |   |      |  |  |   | 96.6    | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Total other asset-backed securities            |  |                    | 831.3   |  |                   |   | 424.7   |           |  |   |      |  |  |   | 1,256.0 | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 
|Total                                          |  | $                  | 1,960.4 |  |                   | $ | 1,061.3 |           |  | $ |      |  |  | $ | 3,021.7 | 
|                                               |  |                    |         |  |                   |   |         |           |  |   |       |  |  |   |         | 

The weighted average rating of the mortgage and asset-backed securities is BBB and BBB+, as of
September 30, 2010 and December 31, 2009, respectively.



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The following
table provides the fair value of non-agency residential mortgage-backed securities, excluding VIE non-agency residential mortgage-backed securities, by vintage and type at September 30, 2010:



|                |  |                 |       |  |             |   |       |                 |  |   |                     |  |  |       |      |  |  |   |         | 
|--------------- |  | --------------- | ----- |  | ----------- | - | ----- | --------------- |  | - | ------------------- |  |  | ----- | ---- |  |  | - | ------- | 
|Year of Issue   |  | First-lienAlt-A |       |  | Second-lien |   |       | First-lienPrime |  |   | First-lienSub-Prime |  |  | Total |     
|($ in millions) |  |                 |       |  |             |   |       |                 |  |   |                     |  |  |       |      |  |  |   |         | 
|2003 and prior  |  | $               |      |  |             | $ | 1.0   |                 |  | $ |                    |  |  | $     | 2.9  |  |  | $ | 3.9     | 
|2004            |  |                 | 26.6  |  |             |   | 3.7   |                 |  |   |                    |  |  |       | 1.5  |  |  |   | 31.8    | 
|2005            |  |                 | 209.3 |  |             |   | 43.4  |                 |  |   | 6.4                 |  |  |       | 3.5  |  |  |   | 262.6   | 
|2006            |  |                 | 210.6 |  |             |   | 94.8  |                 |  |   |                    |  |  |       | 48.0 |  |  |   | 353.4   | 
|2007            |  |                 | 305.6 |  |             |   | 39.3  |                 |  |   |                    |  |  |       | 13.7 |  |  |   | 358.6   | 
|                |  |                 |       |  |             |   |       |                 |  |   |                     |  |  |       |      |  |  |   |         | 
|Total           |  | $               | 752.1 |  |             | $ | 182.2 |                 |  | $ | 6.4                 |  |  | $     | 69.6 |  |  | $ | 1,010.3 | 
|                |  |                 |       |  |             |   |       |                 |  |   |                     |  |  |       |      |  |  |   |         | 

The following table summarizes, for all securities in an unrealized loss position as of September 30,
2010 and December 31, 2009, the aggregate fair value and gross unrealized loss by length of time those securities have been continuously in an unrealized loss position:



|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|------------------------------------------------------------------------- |  | ------------------ | ----- |  | --------------------- | - | ---- | ------------------ |  | - | --------------------- |  |  | - | ---- | 
|                                                                          |  | September 30, 2010 |       |  | December 31, 2009     |  
|($ in millions)                                                           |  | EstimatedFairValue |       |  | GrossUnrealizedLosses |   |      | EstimatedFairValue |  |   | GrossUnrealizedLosses | 
|Municipal obligations in continuous unrealized loss for:                  |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|0  6 months                                                              |  | $                  | 17.1  |  |                       | $ | 0.4  |                    |  | $ | 118.8                 |  |  | $ | 4.1  | 
|7  12 months                                                             |  |                    |      |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|Greater than 12 months                                                    |  |                    | 35.3  |  |                       |   | 2.2  |                    |  |   | 90.8                  |  |  |   | 11.3 | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|                                                                          |  |                    | 52.4  |  |                       |   | 2.6  |                    |  |   | 209.6                 |  |  |   | 15.4 | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|Corporate obligations in continuous unrealized loss for:                  |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|0  6 months                                                              |  |                    |      |  |                       |   |     |                    |  |   | 182.1                 |  |  |   | 9.0  | 
|7  12 months                                                             |  |                    | 1.2   |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|Greater than 12 months                                                    |  |                    | 209.2 |  |                       |   | 24.8 |                    |  |   | 188.7                 |  |  |   | 28.6 | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|                                                                          |  |                    | 210.4 |  |                       |   | 24.8 |                    |  |   | 370.8                 |  |  |   | 37.6 | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|Foreign obligations in continuous unrealized loss for:                    |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|0  6 months                                                              |  |                    |      |  |                       |   |     |                    |  |   | 21.0                  |  |  |   | 0.5  | 
|7  12 months                                                             |  |                    |      |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|Greater than 12 months                                                    |  |                    |      |  |                       |   |     |                    |  |   | 5.0                   |  |  |   | 0.7  | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|                                                                          |  |                    |      |  |                       |   |     |                    |  |   | 26.0                  |  |  |   | 1.2  | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|U.S. treasury obligations in continuous unrealized loss for:              |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|0  6 months                                                              |  |                    |      |  |                       |   |     |                    |  |   | 68.1                  |  |  |   | 1.5  | 
|7  12 months                                                             |  |                    |      |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|Greater than 12 months                                                    |  |                    |      |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|                                                                          |  |                    |      |  |                       |   |     |                    |  |   | 68.1                  |  |  |   | 1.5  | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|U.S. agency obligations in continuous unrealized loss for:                |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|0  6 months                                                              |  |                    | 1.4   |  |                       |   |     |                    |  |   | 4.3                   |  |  |   | 0.1  | 
|7  12 months                                                             |  |                    |      |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|Greater than 12 months                                                    |  |                    |      |  |                       |   |     |                    |  |   |                      |  |  |   |     | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|                                                                          |  |                    | 1.4   |  |                       |   |     |                    |  |   | 4.3                   |  |  |   | 0.1  | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|Residential mortgage-backed securities in continuous unrealized loss for: |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|0  6 months                                                              |  |                    | 4.5   |  |                       |   | 0.3  |                    |  |   | 204.6                 |  |  |   | 13.6 | 
|7  12 months                                                             |  |                    | 3.2   |  |                       |   | 1.7  |                    |  |   | 15.8                  |  |  |   | 2.8  | 
|Greater than 12 months                                                    |  |                    | 125.1 |  |                       |   | 44.0 |                    |  |   | 129.0                 |  |  |   | 79.7 | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 
|                                                                          |  |                    | 132.8 |  |                       |   | 46.0 |                    |  |   | 349.4                 |  |  |   | 96.1 | 
|                                                                          |  |                    |       |  |                       |   |      |                    |  |   |                       |  |  |   |      | 



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|                                                                             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|---------------------------------------------------------------------------- |  | ------------------ | ----- |  | --------------------- | - | ----- | ------------------ |  | - | --------------------- |  |  | - | ----- | 
|                                                                             |  | September 30, 2010 |       |  | December 31, 2009     |  
|($ in millions)                                                              |  | EstimatedFairValue |       |  | GrossUnrealizedLosses |   |       | EstimatedFairValue |  |   | GrossUnrealizedLosses | 
|Collateralized debt obligation securities in continuous unrealized loss for: |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|                                                                             |  |                    |       | 
|0  6 months                                                                 |  |                    |      |  |                       |   |      |                    |  |   |                      |  |  |   |      | 
|7  12 months                                                                |  |                    |      |  |                       |   |      |                    |  |   | 4.5                   |  |  |   | 3.7   | 
|Greater than 12 months                                                       |  |                    | 28.2  |  |                       |   | 13.4  |                    |  |   | 51.9                  |  |  |   | 19.0  | 
|                                                                             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|                                                                             |  |                    | 28.2  |  |                       |   | 13.4  |                    |  |   | 56.4                  |  |  |   | 22.7  | 
|                                                                             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|Other asset-backed securities in continuous unrealized loss for:             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|0  6 months                                                                 |  |                    | 6.1   |  |                       |   |      |                    |  |   | 272.9                 |  |  |   | 30.1  | 
|7  12 months                                                                |  |                    | 23.3  |  |                       |   | 4.4   |                    |  |   | 107.5                 |  |  |   | 12.9  | 
|Greater than 12 months                                                       |  |                    | 460.7 |  |                       |   | 50.2  |                    |  |   | 735.2                 |  |  |   | 162.6 | 
|                                                                             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|                                                                             |  |                    | 490.1 |  |                       |   | 54.6  |                    |  |   | 1,115.6               |  |  |   | 205.6 | 
|                                                                             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 
|Totals                                                                       |  | $                  | 915.3 |  |                       | $ | 141.4 |                    |  | $ | 2,200.2               |  |  | $ | 380.2 | 
|                                                                             |  |                    |       |  |                       |   |       |                    |  |   |                       |  |  |   |       | 

Management has determined that the unrealized losses in fixed income securities at September 30, 2010
are primarily driven by the uncertainty in the structured finance market, primarily with respect to non-agency residential mortgage backed securities and a general increase in risk and liquidity premiums demanded by fixed income investors. Ambac has
concluded that unrealized losses reflected in the table above are temporary in nature based upon (a) no unexpected principal and interest payment defaults on these securities; (b) analysis of the creditworthiness of the issuer and analysis
of projected defaults on the underlying collateral; and (c) Ambacs ability and current intent to hold these securities until a recovery in fair value or maturity. Of the $915.3 million that were in a gross unrealized loss position at
September 30, 2010, below investment grade securities and non-rated securities had a fair value of $114.6 million and unrealized loss of $38.0 million, which represented 12.5% of the total fair value, and 26.9% of the unrealized loss as shown
in the table above. Of the $2,200.2 million that were in a gross unrealized loss position at December 31, 2009, below investment grade securities and non-rated securities had a fair value of $114.4 million and an unrealized loss of $35.0
million, which represented 5.2% of the total fair value and 9.2% of the unrealized loss as shown in the above table.

During
the three and nine months ended September 30, 2010 and 2009, there were other-than-temporary impairment write-downs in the Financial Guarantee and Financial Services investment portfolios. For the three months ended September 30, 2010,
other-than-temporary write-downs in the Financial Guarantee and Financial Services segments were $6.6 million and $0.0 million, respectively. Other-than-temporary impairment charges to earnings in the three months ended September 30, 2010 were
due to credit losses on securities guaranteed by Ambac Assurance. For the nine months ended September 30, 2010, other-than-temporary write-downs in the Financial Guarantee and Financial Services segments were $45.4 million and $3.1 million,
respectively. As further described in Note 1 to the Unaudited Consolidated Financial Statements in Item 1 of this Form 10-Q, on March 24, 2010, the OCI commenced Segregated Account Rehabilitation Proceedings in order to permit the OCI to
facilitate an orderly run-off and/or settlement of the liabilities allocated to the Segregated Account. As a result of actions taken by the OCI, financial guarantee payments on securities guaranteed by Ambac Assurance which have been placed in the
Segregated Account are no longer under the control of Ambac management. Accordingly, estimated cash flows on such securities have been adversely impacted resulting in credit losses as of September 30, 2010, since we own some of those securities
in our investment portfolio. For the three months ended September 30, 2009, other-than-temporary impairment write-downs in the Financial Guarantee and Financial Services segments were $32.5 million and $11.7 million, respectively. For the nine
months ended September 30, 2009 other-than-temporary write-downs in the Financial Guarantee and Financial Services segments were $1,452.7 million and $283.9 million, respectively. These impairments were primarily related to Alt-A residential
mortgage-backed securities



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which management believed had experienced some credit impairment and/or intended to sell as of September 30, 2009. As of September 30, 2010, management has not asserted an intent to
sell any securities from its portfolio. Future changes in our estimated liquidity needs could result in a determination that Ambac no longer has the ability to hold such securities, which could result in additional other-than-temporary impairment
charges.

The following table provides the ratings distribution of the fixed income investment portfolio, excluding VIE
fixed-income investments, at September 30, 2010 and December 31, 2009:

Rating(1)



|                       |  |                    |     |   |                   |  |     |          |  |  |     |  
|---------------------- |  | ------------------ | --- | - | ----------------- |  | --- | -------- |  |  | --- | -
|                       |  | FinancialGuarantee |     |   | FinancialServices |  |     | Combined | 
|September 30, 2010:    |  |                    |     |   |                   |  |     |          |  |  |     |  
|AAA                    |  |                    | 32  | % |                   |  | 66  | %        |  |  | 39  | %
|AA                     |  |                    | 31  |   |                   |  | 14  |          |  |  | 28  |  
|A                      |  |                    | 15  |   |                   |  | 2   |          |  |  | 12  |  
|BBB                    |  |                    | 10  |   |                   |  | 2   |          |  |  | 9   |  
|Below investment grade |  |                    | 12  |   |                   |  | 16  |          |  |  | 12  |  
|Not Rated              |  |                    | <1  | % |                   |  |    |          |  |  | <1  | %
|                       |  |                    |     |   |                   |  |     |          |  |  |     |  
|                       |  |                    | 100 | % |                   |  | 100 | %        |  |  | 100 | %
|                       |  |                    |     |   |                   |  |     |          |  |  |     |  
|December 31, 2009:     |  |                    |     |   |                   |  |     |          |  |  |     |  
|AAA                    |  |                    | 30  | % |                   |  | 70  | %        |  |  | 37  | %
|AA                     |  |                    | 33  |   |                   |  | 20  |          |  |  | 31  |  
|A                      |  |                    | 17  |   |                   |  | 2   |          |  |  | 14  |  
|BBB                    |  |                    | 8   |   |                   |  |    |          |  |  | 7   |  
|Below investment grade |  |                    | 12  |   |                   |  | 8   |          |  |  | 11  |  
|Not Rated              |  |                    | <1  | % |                   |  |    |          |  |  | <1  | %
|                       |  |                    |     |   |                   |  |     |          |  |  |     |  
|                       |  |                    | 100 | % |                   |  | 100 | %        |  |  | 100 | %
|                       |  |                    |     |   |                   |  |     |          |  |  |     |  



|(1) | Ratings are based on the lower of Standard & Poors or Moodys ratings. If guaranteed, rating represents the higher of the underlying or
guarantors financial strength rating.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Ambacs fixed income portfolio includes securities covered by
guarantees issued by Ambac Assurance and other financial guarantors (insured securities). The published Moodys and S&P ratings on these securities reflect the higher of the financial strength rating of the financial guarantor
or the rating of the underlying issuer. Rating agencies do not always publish separate underlying ratings (those ratings excluding the insurance by the financial guarantor) because the insurance cannot be legally separated from the underlying
security by the insurer. Ambac obtains underlying ratings through ongoing dialogue with rating agencies and other sources. In the event these underlying ratings are not available from the rating agencies, Ambac will assign an internal rating. Since
the insurance cannot be legally separated from the underlying security, the fair value of the insured securities in the investment portfolio includes the value of any financial guarantee embedded in such securities, including guarantees written by
Ambac Assurance. In addition, a hypothetical fair value assuming the absence of the insurance is not readily available from our independent pricing sources.



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The following
table represents the fair value, including the value of the financial guarantee, and weighted-average underlying rating, excluding the financial guarantee, of the insured securities, excluding VIE guaranteed securities, at September 30, 2010 and
December 31, 2009:



|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|--------------------------------------------- |  | -------------------- | ------- |  | -------------------- | - | ----- | ---------------------------------- |  | - | ----- |  |  | ----- | --- |  | ---------------------------------- | - | ------- |  |  |  | ---- | 
|($ in millions)                               |  | Municipalobligations |         |  | Corporateobligations |   |       | Mortgageand asset-backedsecurities |  |   | Other |  |  | Total |     |  | WeightedAverageUnderlyingRating(1) |  
|September 30, 2010                            |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Financial Guarantee                           |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|National Public Finance Guarantee Corporation |  | $                    | 877.0   |  |                      | $ | 83.8  |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 960.8   |  |  |  | A+   | 
|Ambac Assurance Corporation                   |  |                      | 58.0    |  |                      |   | 4.8   |                                    |  |   | 778.5 |  |  |       |    |  |                                    |   | 841.3   |  |  |  | BB+  | 
|Assured Guaranty Municipal Corporation        |  |                      | 419.8   |  |                      |   | 95.3  |                                    |  |   | 21.7  |  |  |       |    |  |                                    |   | 536.8   |  |  |  | A    | 
|Financial Guarantee Insurance Corporation     |  |                      | 17.1    |  |                      |   |      |                                    |  |   | 12.4  |  |  |       |    |  |                                    |   | 29.5    |  |  |  | BBB  | 
|MBIA Insurance Corporation                    |  |                      |        |  |                      |   | 19.2  |                                    |  |   | 6.8   |  |  |       |    |  |                                    |   | 26.0    |  |  |  | BBB- | 
|Assured Guaranty Corporation                  |  |                      |        |  |                      |   |      |                                    |  |   | 15.3  |  |  |       |    |  |                                    |   | 15.3    |  |  |  | D    | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Total                                         |  | $                    | 1,371.9 |  |                      | $ | 203.1 |                                    |  | $ | 834.7 |  |  | $     |    |  |                                    | $ | 2,409.7 |  |  |  | A-   | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Financial Services                            |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Assured Guaranty Municipal Corporation        |  | $                    |        |  |                      | $ | 57.6  |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 57.6    |  |  |  | BBB  | 
|Assured Guaranty Corporation                  |  |                      |        |  |                      |   |      |                                    |  |   | 28.4  |  |  |       |    |  |                                    |   | 28.4    |  |  |  | B+   | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Total                                         |  | $                    |        |  |                      | $ | 57.6  |                                    |  | $ | 28.4  |  |  | $     |    |  |                                    | $ | 86.0    |  |  |  | BB+  | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Corporate                                     |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Assured Guaranty Municipal Corporation        |  | $                    | 24.5    |  |                      | $ |      |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 24.5    |  |  |  | AA-  | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Total                                         |  | $                    | 24.5    |  |                      | $ |      |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 24.5    |  |  |  | AA-  | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|December 31, 2009                             |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Financial Guarantee                           |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|National Public Finance Guarantee Corporation |  | $                    | 1,546.0 |  |                      | $ | 24.7  |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 1,570.7 |  |  |  | A+   | 
|Ambac Assurance Corporation                   |  |                      | 53.8    |  |                      |   | 22.9  |                                    |  |   | 745.9 |  |  |       | 1.2 |  |                                    |   | 823.8   |  |  |  | BB   | 
|Assured Guaranty Municipal Corporation        |  |                      | 630.7   |  |                      |   | 86.7  |                                    |  |   | 28.1  |  |  |       |    |  |                                    |   | 745.5   |  |  |  | A+   | 
|MBIA Insurance Corporation                    |  |                      |        |  |                      |   | 17.7  |                                    |  |   | 10.8  |  |  |       |    |  |                                    |   | 28.5    |  |  |  | BBB- | 
|Financial Guarantee Insurance Corporation     |  |                      | 16.0    |  |                      |   |      |                                    |  |   | 22.5  |  |  |       |    |  |                                    |   | 38.5    |  |  |  | BBB+ | 
|Assured Guaranty Corporation                  |  |                      |        |  |                      |   |      |                                    |  |   | 16.2  |  |  |       |    |  |                                    |   | 16.2    |  |  |  | D    | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Total                                         |  | $                    | 2,246.5 |  |                      | $ | 152.0 |                                    |  | $ | 823.5 |  |  | $     | 1.2 |  |                                    | $ | 3,223.2 |  |  |  | A-   | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Financial Services                            |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Assured Guaranty Municipal Corporation        |  | $                    |        |  |                      | $ | 54.8  |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 54.8    |  |  |  | BBB  | 
|Assured Guaranty Corporation                  |  |                      |        |  |                      |   |      |                                    |  |   | 27.0  |  |  |       |    |  |                                    |   | 27.0    |  |  |  | BB   | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Total                                         |  | $                    |        |  |                      | $ | 54.8  |                                    |  | $ | 27.0  |  |  | $     |    |  |                                    | $ | 81.8    |  |  |  | BBB- | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Corporate                                     |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Assured Guaranty Municipal Corporation        |  | $                    | 24.5    |  |                      | $ |      |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 24.5    |  |  |  | AA-  | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 
|Total                                         |  | $                    | 24.5    |  |                      | $ |      |                                    |  | $ |      |  |  | $     |    |  |                                    | $ | 24.5    |  |  |  | AA-  | 
|                                              |  |                      |         |  |                      |   |       |                                    |  |   |       |  |  |       |     |  |                                    |   |         |  |  |  |      | 



|(1) | Ratings represent the lower underlying rating assigned by S&P or Moodys. If unavailable, Ambacs internal rating is used.
|--- | --------------------------------------------------------------------------------------------------------------------------



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Taxes. On February 2, 2010, Ambac entered into a Tax Benefit Preservation Plan (the Plan) with Mellon
Investor Services LLC, as Rights Agent. The Plan was adopted in an effort to protect Ambacs valuable federal net operating losses (NOLs) under Section 382 of the Internal Revenue Code of 1986, as amended (the
Code).

As of September 30, 2010, Ambac had NOLs amounting to approximately $7.6 billion. Ambac can utilize
these tax attributes in certain circumstances to offset future U.S. taxable income and reduce Ambacs U.S. federal income tax liability, which may arise even in periods when Ambac incurs a US GAAP accounting loss. However, Ambacs
ability to use the NOLs could be substantially limited if there were an ownership change as defined under Section 382 of the Code. In general, an ownership change would occur if certain ownership changes related to Ambacs
stock held by 5% or greater shareholders exceeded 50%, measured over a rolling up to three year period beginning with the last ownership change. These provisions can be triggered not only by new issuances and merger and acquisition activity, but by
normal market trading, as well. The rights plan is designed to deter trading that would lead to the loss of Ambacs valuable NOLs and the resulting reduction in shareholder value.

Our Board of Directors has the discretion to exempt an acquisition of common stock from the provisions of the rights plan if it
determines that the acquisition will not jeopardize tax benefits or is otherwise in Ambacs best interests. The rights plan was adopted with the sole intent of preserving Ambacs tax attributes, and not with the goal of deterring any
strategic transactions. The Board remains open to considering all alternatives to maximize stockholder value.

Under the Plan,
from and after the record date of February 16, 2010, each share of our common stock will carry with it one preferred share purchase right (a Right), until the Distribution Date (as defined below) or earlier expiration of the
Rights. In general terms, the Rights will work to impose a significant penalty upon any person or group which acquires 4.9% or more of our outstanding common stock after February 2, 2010, without the approval of our Board. Shareholders who own
4.9% or more of the outstanding common stock as of the close of business on February 2, 2010, will not trigger the Rights so long as they do not (i) acquire additional shares of common stock representing one percent (1.0%) or more of
the shares of common stock then outstanding or (ii) fall under 4.9% ownership of common stock and then reacquire shares that in the aggregate equal 4.9% or more of the common stock.

A more detailed description of the Rights as well as a copy of the Plan itself is included in our Current Report on Form 8-K filed on
February 3, 2010.

Cash Flows. Net cash used in operating activities was $2,164.8 million and $1,270.1
million during the nine months ended September 30, 2010 and 2009, respectively. Operating cash flows were negatively impacted by realized losses of $2.8 billion as a result of commutations entered into in 2010 (including the Settlement
Agreement of CDO of ABS), partially offset the reduction in insurance losses paid as a result of the claim moratorium with respect to the rehabilitation of the Segregated Account ($1,083.8 million of claims presented but not paid in the first nine
months of 2010). Future net cash provided by operating activities will be impacted by the level of premium collections and claim payments, including payments under credit default swap contracts.

Net cash used in financing activities was $370.7 million and ($1,553.6) million during the nine months ended September 30, 2010 and
2009, respectively. Financing activities for the nine months ended September 30, 2010 included repayments of investment and payment agreements of $290.7 million and net cash collateral returned in connection with a CDO of ABS transaction that
was commuted in 2010. Financing activities for the nine months ended September 30, 2009 included repayments of investment and payment agreements of $1,643.1 million, partially offset by proceeds from Ambac Assurances preferred stock
issuance of $100 million.



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Net cash provided
by investing activities was $2,493.2 million and $2,865.5 million during the nine months ended September 30, 2010 and 2009, respectively. These investing activities were primarily from sales and maturities of fixed income securities to meet
operating cash flow needs.

Net cash (used in) provided by operating, investing and financing activities was ($42.4) million
and $41.8 million during the nine months ended September 30, 2010 and 2009, respectively.

Special Purpose and
Variable Interest Entities.Please refer to Note 3, Application of the New Consolidation Accounting Standard on Special Purpose Entities, including Variable Interest of the Unaudited Consolidated Financial
Statements on this Form 10-Q for information regarding special purpose and variable interest entities. Ambac does not have any other off-balance sheet arrangements



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|Item 3. | Quantitative and Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------

Risk Management. As a consequence of the Segregated Account Rehabilitation Proceedings, the rehabilitator retains operational control and decision-making authority with respect to all
matters related to the Segregated Account, including surveillance, remediation and loss mitigation. Similarly, by virtue of the contracts executed between Ambac Assurance and the Segregated Account in connection with the establishment, and
subsequent rehabilitation, of the Segregated Account, the rehabilitator retains the discretion to oversee and approve certain actions taken by Ambac Assurance in respect of assets and liabilities which remain in Ambac Assurance. As such, the
following discussion of Ambacs risk management practices is qualified by reference to the rehabilitators exercise of its discretion to alter or eliminate any of these risk management practices.

In 2009, Ambac made several changes to its risk management function to adapt to the economic crisis and its impact on the insured
portfolio. The worsening of the economic crisis throughout 2008 and 2009 caused us to heighten our surveillance efforts on all exposures in financial guarantee insurance or credit derivative form, focusing on the identification of credits and asset
types across the portfolio that were likely to experience increased stress or potential for losses. Staffing in all surveillance areas was increased to maintain an intensified emphasis on the oversight of vulnerable credits. The changes reorganized
Ambacs risk management function, to emphasize reducing firm-wide risk, and to improve recovery and remediation efforts. The risk management changes included making structural and process-related changes and resulted in an organizational
structure designed around three major areas of focus: (1) Portfolio Risk Management and Analysis (PRMG); (2) Credit Risk Management (CRM) and (3) Risk Operations. In portfolio risk management, the primary focus
is on surveillance, remediation and loss mitigation, where surveillance personnel perform periodic reviews of exposures according to a schedule based on the risk profile of the guaranteed obligations or as necessitated by specific credit events or
other macro-economic variables. Proactive credit remediation can help secure rights and remedies which mitigate losses in the event of default. Credit risk management manages the decision making process for material decisions (e.g., rating /
classification change, amendments, waivers and consents, execution of loss mitigation and de-risking initiatives, including workouts) and adversely classified credit reviews. In risk operations, the group is responsible for data and information
management and establishing loss and loss expense reserves for non-derivative insurance policies and estimated impairments on credit derivative contracts. All risk management responsibilities are consolidated under the Chief Executive Officer, who
updates the Audit and Risk Management Committee of the Board of Directors with respect to risk-related topics.

Credit
Risk. Ambac is exposed to credit risk in various capacities including as an issuer of financial guarantees and credit default swaps, as counterparty to reinsurers and derivative and other financial contracts and as a holder of investment
securities.

Surveillance personnel perform periodic reviews of exposures according to a schedule based on the risk profile of
the guaranteed obligations or as necessitated by specific credit events or other macro-economic variables. Proactive credit remediation can help secure rights and remedies which mitigate losses in the event of default.

Ambac manages credit risk associated with its investment portfolio through adherence to specific investment guidelines. These guidelines
establish limits based upon single risk concentration, asset type limits and minimum credit rating standards. Additionally, senior credit personnel monitor the portfolio on a continuous basis. Credit monitoring of the investment portfolio includes
enhanced procedures on certain Alt-A residential mortgage backed securities which have experienced significant unrealized losses. Credit risks relating to derivative positions (other than credit derivatives) primarily concern the default of a
counterparty. Counterparty default exposure is mitigated through the use of industry standard collateral posting agreements. For counterparties subject to such collateral posting agreements, collateral is posted when a derivative counterpartys
credit exposure exceeds contractual limits.



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|Item 3. | Quantitative and Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------





To minimize its
exposure to significant losses from reinsurer insolvencies, Ambac Assurance (i) monitors the financial condition of its reinsurers; (ii) is entitled to receive collateral from its reinsurance counterparties in certain reinsurance
contracts; and (iii) has certain cancellation rights that can be exercised by Ambac Assurance in the event of rating agency downgrades of a reinsurer. At the inception of each reinsurance contract, Ambac Assurance requires collateral from
certain reinsurers primarily to (i) receive statutory credit for the reinsurance for foreign reinsurers, (ii) provide liquidity to Ambac Assurance in the event of claims on the reinsured exposures, and (iii) enhance rating agency
credit for the reinsurance. Ambac Assurance held letters of credit and collateral amounting to approximately $290.6 million from its reinsurers at September 30, 2010.

As of September 30, 2010, the aggregate amount of insured par ceded by Ambac to reinsurers under reinsurance agreements was $27,055 million. The largest reinsurer accounted for 6.3% of gross par
outstanding at September 30, 2010. The following table represents the percentage ceded to reinsurers and reinsurance recoverable at September 30, 2010 and its rating levels as of November 4, 2010:



|                             |  |                   |     |  |         |  |        |                             |  |  |                                                        |  |  |  |                  |  |  |  |        |   |  |   |        | 
|---------------------------- |  | ----------------- | --- |  | ------- |  | ------ | --------------------------- |  |  | ------------------------------------------------------ |  |  |  | ---------------- |  |  |  | ------ | - |  | - | ------ | 
|                             |  | Standard & Poors |     |  | Moodys |  |        | Percentageof
totalpar ceded |  |  | Net 
unsecuredreinsurancerecoverable 
(inthousands)(2) | 
|Reinsurers                   |  | Rating            |     |  | Outlook |  |        | Rating                      |  |  | Outlook                                                |  |  | 
|Assured Guaranty Re Ltd(1)   |  |                   | AA  |  |         |  | Stable |                             |  |  | A1                                                     |  |  |  | Negative outlook |  |  |  | 84.16  | % |  | $ |       | 
|Assured Guaranty Corporation |  |                   | AA+ |  |         |  | Stable |                             |  |  | Aa3                                                    |  |  |  | Negative outlook |  |  |  | 7.82   | % |  |   | 16,361 | 
|Sompo Japan Insurance Inc    |  |                   | AA- |  |         |  | Stable |                             |  |  | Aa3                                                    |  |  |  | Stable           |  |  |  | 7.78   | % |  |   |       | 
|Other                        |  |                   |     |  |         |  |        |                             |  |  |                                                        |  |  |  |                  |  |  |  | 0.24   | % |  |   | 5,476  | 
|                             |  |                   |     |  |         |  |        |                             |  |  |                                                        |  |  |  |                  |  |  |  |        |   |  |   |        | 
|Total                        |  |                   |     |  |         |  |        |                             |  |  |                                                        |  |  |  |                  |  |  |  | 100.00 | % |  | $ | 21,837 | 
|                             |  |                   |     |  |         |  |        |                             |  |  |                                                        |  |  |  |                  |  |  |  |        |   |  |   |        | 



|(1) | According to the terms of the reinsurance agreement, Ambac Assurance has certain cancellation rights that can be exercised.
|--- | ---------------------------------------------------------------------------------------------------------------------------

|(2) | Represents reinsurance recoverables on paid and unpaid losses and deferred ceded premiums, net of ceded premium payables due to reinsurers, letters of credit, and
collateral posted for the benefit of the Company.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Market Risk. Market risk represents the
potential for losses that may result from changes in the value of a financial instrument as a result of changes in market conditions. The primary market risks that would impact the value of Ambacs financial instruments are interest rate risk,
basis risk (e.g., taxable index rates relative to issue specific or tax-exempt index rates) and credit spread risk. Below we discuss each of these risks and the specific types of financial instruments impacted. Senior managers in Ambacs Risk
Management group are responsible for monitoring risk limits and applying risk measurement methodologies. The estimation of potential losses arising from adverse changes in market conditions is a key element in managing market risk. Ambac utilizes
various systems, models and stress test scenarios to monitor and manage market risk. This process includes frequent analyses of both parallel and non-parallel shifts in the benchmark interest rate curve and Value-at-Risk
(VaR) measures. These models include estimates, made by management, which utilize current and historical market information. The valuation results from these models could differ materially from amounts that would actually be realized in
the market.

Financial instruments for which fair value may be adversely affected by changes in interest rates consist
primarily of investment securities, loans, investment agreement liabilities, obligations under payment agreements, long-term debt and interest rate derivatives.



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|Item 3. | Quantitative and Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------





Ambac, through its
subsidiary Ambac Financial Services, is a provider of interest rate and currency swaps to states, municipalities and their authorities and other entities in connection with their financings. Ambac Financial Services manages its swaps business with
the goal of being market neutral to changes in benchmark interest rates while retaining some basis risk and some excess interest rate sensitivity as an economic hedge against the effects of rising interest rates on Ambacs financial guarantee
exposures. The incremental interest rate sensitivity in the swaps business associated with this hedging position is such that, a 1 basis point decrease in US Libor would result in mark-to-market loss of approximately $2.0 million and $1.7 million at
September 30, 2010 and December 31, 2009, respectively. Basis risk in the portfolio arises from (i) variability in the ratio of benchmark tax-exempt to taxable interest rates, (ii) potential changes in municipal issuers
bond-specific variable rates relative to taxable interest rates, and (iii) variability between Treasury and swap rates. If actual or projected benchmark tax-exempt interest rates increase or decrease in a parallel shift by 1% in
relation to taxable interest rates, Ambac would experience a mark-to-market gain or loss of $0.1 million and $0.02 million at September 30, 2010 and December 31, 2009, respectively. For a 1 basis point parallel shift in USD Libor interest
rates versus the US Treasury rate Ambac would experience a mark-to-market gain or loss of $0.05 million and $0.06 million at September 30, 2010 and December 31, 2009, respectively. The derivative portfolio also includes an unhedged
Sterling-denominated exposure to Consumer Price Inflation in the United Kingdom (UKRPI). For a 1% change in UKRPI for all maturities Ambac would experience a mark-to-market gain or loss of $0.02 million and $0.02 million at September 30, 2010
and December 31, 2009, respectively. Each of the amounts above are presenting sensitivity (gain or loss) under the assumption that everything else remains unchanged. Actual changes in tax-exempt interest rates, UKRPI and US Libor vs. US
Treasury, as well as changes in Libor curves for different currencies themselves are correlated. This correlation is taken into account when we produce VaR numbers based on historical changes of all interest rate risk components as discussed below.

The estimation of potential losses arising from adverse changes in market relationships, known as VaR, is a key element in
managements monitoring of basis risk for the municipal interest rate swap portfolio. Ambac has developed a VaR methodology to estimate potential losses using a one day time horizon and a 99% confidence level. This means that Ambac would expect
to incur losses greater than that predicted by VaR estimates only once in every 100 trading days, or about 2.5 times a year. Ambacs methodology estimates VaR using a 300-day historical look back period. This means that changes in
market values are simulated using market inputs from the past 300 days. For the nine months ended September 30, 2010 and the year ended December 31, 2009, Ambacs VaR, for its interest rate swap portfolio (which excludes hedges of the
financial guarantee portfolios interest rate exposures) averaged approximately $3.9 million and $4.5 million, respectively. Ambacs VaR ranged from a high of $6.5 million to a low of $1.9 million in the nine months ended
September 30, 2010 and from a high of $6.5 million to a low of $2.2 million in the year ended December 31, 2009. Ambac supplements its VaR methodology, which it believes is a good risk management tool in normal markets, by performing
rigorous stress testing to measure the potential for losses in abnormally volatile markets. These stress tests include (i) parallel and non-parallel shifts in the benchmark interest rate curve and (ii) immediate changes in normal basis
relationships, such as those between taxable and tax-exempt markets.

Financial instruments that may be adversely affected by
changes in credit spreads include Ambacs outstanding credit derivative contracts and invested assets. Changes in credit spreads are generally caused by changes in the markets perception of the credit quality of the underlying
obligations. Market liquidity and prevailing risk premiums demanded by market participants are also reflected in credit spreads and impact valuations.

Ambac, through its subsidiary Ambac Credit Products (ACP), entered into credit derivative contracts. These contracts require ACP to make payments upon the occurrence of certain defined credit
events relating to an underlying obligation (generally a fixed income obligation). If credit spreads of the underlying obligations change, the market value of the related credit derivative changes. As such, ACP could experience mark-to-market gains
or losses.



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|Item 3. | Quantitative and Qualitative Disclosures About Market Risk
|------- | ----------------------------------------------------------





The following
table summarizes the par exposure outstanding and gross derivative liability balance related to credit derivatives as of September 30, 2010 by asset type:



|                                       |  |     |        |   |       |   |       |       |  |   |        |  
|-------------------------------------- |  | --- | ------ | - | ----- | - | ----- | ----- |  | - | ------ | -
|($ in millions)                        |  | CLO |        |   | Other |   |       | Total | 
|Par outstanding                        |  | $   | 12,246 |   |       | $ | 8,126 |       |  | $ | 20,372 |  
|Credit derivative liability fair value |  |     | (81    | ) |       |   | (152  | )     |  |   | (233   | )

The following table
summarizes the estimated change in fair values on the balance of Ambacs credit derivative contracts assuming immediate parallel shifts in reference obligation spreads at September 30, 2010:



|                             |  |     |      |   |       |  |      |       |  |  |                                       |   |  |  |      |  
|---------------------------- |  | --- | ---- | - | ----- |  | ---- | ----- |  |  | ------------------------------------- | - |  |  | ---- | -
|Change in Underlying Spreads |  | CLO |      |   | Other |  |      | Total |  |  | Total 
EstimatedUnrealizedGain/(Loss) |  
|500 basis point widening     |  |     | (145 | ) |       |  | (127 | )     |  |  | (272                                  | ) |  |  | (505 | )
|250 basis point widening     |  |     | (73  | ) |       |  | (63  | )     |  |  | (136                                  | ) |  |  | (369 | )
|50 basis point widening      |  |     | (14  | ) |       |  | (13  | )     |  |  | (27                                   | ) |  |  | (260 | )
|Base scenario                |  |     |     |   |       |  |     |       |  |  |                                      |   |  |  | (233 | )
|50 basis point narrowing     |  |     | 14   |   |       |  | 13   |       |  |  | 27                                    |   |  |  | (206 | )
|250 basis point narrowing    |  |     | 66   |   |       |  | 54   |       |  |  | 120                                   |   |  |  | (113 | )
|500 basis point narrowing    |  |     | 79   |   |       |  | 83   |       |  |  | 162                                   |   |  |  | (71  | )

Also included in the fair
value of credit derivative liabilities is an Ambac credit valuation adjustment (CVA), which reflects managements estimate of the fair value adjustment placed on Ambacs insured obligation due to the markets perception of
Ambacs ability to meet its obligations. Refer to Note 11 to the Unaudited Consolidated Financial Statements Part 1, Item 1 of this Form 10-Q for discussion of Ambacs fair value measurements for credit derivatives, including the
incorporation of Ambacs CVA into the determination of fair value. The Ambac CVA has resulted in a $930 million reduction to the credit derivatives liability as of September 30, 2010, which represents an 80% adjustment to the fair value
calculated without the effect of Ambacs own credit risk. Each percentage point increase in the Ambac CVA would result in a corresponding decrease in the fair value of credit derivative liabilities by approximately $11.6 million.

Beginning in the second half of 2007 and continuing through 2009, credit spreads on certain fixed income securities held in our
investment portfolio have widened substantially as the global credit crisis has moved into global recession. In particular, certain Alt-A residential mortgage backed securities originally rated triple-A and purchased at or near par value are valued
at yields indicating spreads greater than 1,400 basis points over LIBOR as of September 30, 2010. Some of the impairments to fair value on these securities have been determined to be other-than-temporary during managements quarterly
evaluation process resulting in adjustments to the cost bases of the securities. Cumulative reductions to fair value on Ambacs investments in Alt-A securities held at September 30, 2010, including those recorded as adjustments to the
amortized cost basis due to other-than-temporary impairment, total $0.7 billion. Future performance of the mortgages underlying these securities, as well as U. S. residential mortgages in general, market liquidity for RMBS securities and other
factors could result in significant changes to credit spreads and consequently the fair value of our invested assets.



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|Item 4. | Controls and Procedures
|------- | -----------------------



| | (a) | Evaluation of Disclosure Controls and Procedures. Ambacs management, with the participation of Ambacs Chief Executive Officer and Chief Financial
Officer, has evaluated the effectiveness of Ambacs disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act)), as of the
end of the period covered by this report. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its
judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on this evaluation, Ambacs Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, Ambacs
disclosure controls and procedures are effective at the reasonable assurance level.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Disclosure controls and
procedures are the controls and other procedures of Ambac Financial Group that are designed to ensure that information required to be disclosed by Ambac Financial Group (including its consolidated subsidiaries) in the reports that it files or
submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SECs rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to
ensure that information required to be disclosed by Ambac Financial Group in the reports that it files or submits under the Exchange Act is accumulated and communicated to Ambac Financial Groups management, including its Chief Executive
Officer and Chief Financial officer, to allow timely decisions regarding required disclosure.



| | (b) | Changes in Internal Controls Over Financial Reporting. There were no changes in Ambacs internal control over financial reporting during the fiscal quarter
ended September 30, 2010 that have materially affected, or are reasonably likely to materially affect, Ambacs internal control over financial reporting.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|Item 1. | Legal Proceedings.
|------- | ------------------

Ambac
Financial Group, Inc. (defined herein as Ambac or Ambac Financial Group) and certain of its present or former officers or directors have been named in lawsuits that allege violations of the federal securities laws and/or
state law. Various putative class action suits alleging violations of the federal securities laws have been filed against the Company and certain of its present or former directors or officers. These suits include four class actions filed in January
and February of 2008 in the United States District Court for the Southern District of New York that were consolidated on May 9, 2008 under the caption In re Ambac Financial Group, Inc. Securities Litigation, Lead Case No. 08 CV 411.
On July 25, 2008, another suit, Painting Industry Insurance and Annuity Funds v. Ambac Assurance Corporation, et al., case No. 08 CV 6602, was filed in the United States District for the Southern District of New York. On or about
August 22, 2008, a consolidated amended complaint was filed in the consolidated action. The consolidated amended complaint includes the allegations presented by the original four class actions, the allegations presented by the Painting
Industryaction, and additional allegations. The consolidated amended complaint purports to be brought on behalf of purchasers of Ambacs common stock from October 25, 2006 to April 22, 2008, on behalf of purchasers of
Ambacs DISCS, issued in February of 2007, and on behalf of purchasers of equity units and common stock in Ambacs March 2008 offerings. The suit names as defendants the Company, the underwriters for the three offerings, the
Companys independent Certified Public Accountants and certain present and former directors and officers of the Company. The complaint alleges, among other things, that the defendants issued materially false and misleading statements regarding
Ambacs business and financial results and guarantees of CDO and MBS transactions and that the Registration Statements pursuant to which the three offerings were made contained material misstatements and omissions in violation of the securities
laws. On August 27, 2009, the Company and the individual defendants named in the consolidated securities action moved to dismiss the consolidated amended complaint. On February 22, 2010, the Court dismissed the claims arising out of the
March 2008 equity units and common stock offering (resulting in the dismissal of the Companys independent Certified Public Accountants from the action), and otherwise denied the motions to dismiss. On April 15, 2010, the Court ordered a
Discovery Plan and Proposed Pretrial Schedule, pursuant to which discovery was scheduled to commence on May 10, 2010, with dispositive motions due by December 2, 2011. Separately, on December 14, 2009, a purchaser of Ambacs
DISCS filed an individual action entitled Judy Ehrenreich v. Ambac Financial Group, Inc. et al., asserting alleged violations of the federal securities laws, in the United States District Court for the Southern District of New York, against
Ambac and one former officer, Case No. 09 CV 10173. The complaint alleges, among other things, that the defendants issued materially false and misleading statements regarding Ambacs plans to meet certain investment agreement collateral
requirements as well as materially false and misleading statements regarding Ambacs valuation of certain of its investment securities. On March 9, 2010, the Company and the former officer moved to dismiss.

On December 24, 2008, a complaint in a putative class action entitled Stanley Tolin et al. v. Ambac Financial Group, Inc. et
al., asserting alleged violations of the federal securities laws was filed in the United States District Court for the Southern District of New York against Ambac, one former officer and director and one former officer,Case No. 08
CV 11241. An amended complaint was subsequently filed on January 20, 2009. This action is brought on behalf of all purchasers of Structured Repackaged Asset-Backed Trust Securities, Callable Class A Certificates, Series 2007-1, STRATS(SM)
Trust for Ambac Financial Group, Inc. Securities 2007-1 (STRATS) from June 29, 2007 through April 22, 2008. The STRATS are asset-backed securities that were allegedly issued by a subsidiary of Wachovia Corporation and are
allegedly collateralized solely by Ambacs DISCS. The complaint alleges, among other things, that the defendants issued materially false and misleading statements regarding Ambacs business and financial results and Ambacs guarantees
of CDO and MBS transactions, in violation of the securities laws. On April 15, 2009, the Company and the individual



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defendants named in Tolin moved to dismiss the amended complaint.On December 23, 2009, the Court initially denied defendants motion to dismiss, but later recalled that
decision and requested further briefing from parties in the case before it rendered a decision on the motion to dismiss. The additional briefing was completed on March 5, 2010, and oral argument on the motion to dismiss was heard on
August 4, 2010.

Various shareholder derivative actions have been filed against certain present or former officers or
directors of Ambac, and against Ambac as a nominal defendant. These suits, which are brought purportedly on behalf of the Company, are in many ways similar and allege violations of law for conduct occurring between October 2005 and the dates of suit
regarding, among other things, Ambacs guarantees of CDO and MBS transactions, Ambacs public disclosures regarding such guarantees and Ambacs financial condition, and certain defendants alleged insider trading on non-public
information. The suits include (i) three actions filed in the United States District Court for the Southern District of New York that have been consolidated under the caption In re Ambac Financial Group, Inc. Derivative Litigation, Lead
Case No. 08 CV 854; on June 30, 2008, plaintiffs filed a consolidated and amended complaint that asserts violations of state and federal law, including breaches of fiduciary duties, waste of corporate assets, unjust enrichment and
violations of the federal securities laws; on August 8, 2008, the Company and the individual defendants named in the consolidated Southern District of New York derivative action moved to dismiss that action for want of demand and failure to
state a claim upon which relief can be granted; on December 11, 2008, the court granted plaintiffs motion for leave to amend the complaint and plaintiffs filed an amended complaint on December 17, 2008; on June 2, 2009
defendants moved to dismiss the amended complaint; (ii) two actions filed in the Delaware Court of Chancery that have been consolidated under the caption In re Ambac Financial Group, Inc. Shareholders Derivative Litigation, Consolidated
C.A. No. 3521; on May 7, 2008, plaintiffs filed a consolidated and amended complaint that asserts claims including breaches of fiduciary duties, waste, reckless and gross mismanagement, and unjust enrichment; on December 30, 2008, the
Delaware Court of Chancery granted defendants motion to stay the Delaware shareholder derivative action in favor of the Southern District of New York Consolidated Derivative Action; plaintiffs in the Delaware action subsequently moved to
intervene in the Southern District of New York derivative action and on May 12, 2009, the motion to intervene was denied; and (iii) two actions filed in the Supreme Court of the State of New York, New York County, that have been
consolidated under the caption In re Ambac Financial Group, Inc. Shareholder Derivative Litigation, Consolidated Index No. 650050/2008E; on September 22, 2008, plaintiffs filed a consolidated and amended complaint that asserts
claims including breaches of fiduciary duties, gross mismanagement, abuse of control, and waste; on January 5, 2010, the New York Supreme Court granted defendants motion to stay the New York Supreme Court action in favor of the Southern
District of New York Consolidated Derivative Action.

Karthikeyan V. Veera v. Ambac Financial Group, Inc. et al., (United
States District Court for the Southern District of New York, Case No. 10 CV 4191, filed on or about May 24, 2010, and amended on September 7, 2010). Plaintiff, a former employee and participant in the Companys Saving Incentive
Plan (the Plan), asserts violations of the Employee Retirement Income Security Act of 1974 (ERISA) and names as defendants the Plan Administrative Committee, the Plan Investment Committee, the Compensation Committee of the
Board of Directors of the Company, and a number of current and former officers of the Company. This action is purportedly brought on behalf of all persons, excluding defendants and their immediate families, who were participants in the Plan
from October 1, 2006 through July 2, 2008 and whose Plan accounts included an investment in Ambac stock. The complaint alleges, among other things, breaches of fiduciary duties by defendants in respect of the continued offering of
Ambac stock as an investment option for the Plan and the failure to provide complete and accurate information to Plan participants regarding the Companys financial condition. This ERISA action seeks, among other things, compensatory
damages and attorneys fees. On October 20, 2010, all of the defendants named in the amended complaint moved to dismiss all of the claims in the amended complaint.



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County of Alameda
et al. v. Ambac Financial Group, Inc. et al. (Superior Court of the State of California, County of San Francisco, filed on or about October 13, 2010) (Alameda Complaint); Contra Costa County et al. v. Ambac Financial Group, Inc. et
al. (Superior Court of the State of California, County of San Francisco, filed on or about October 13, 2010) (Contra Costa Complaint); The Olympic v. Ambac Financial Group, Inc. et al. (Superior Court of the State of California,
County of San Francisco, filed on or about October 13, 2010) (Olympic Club Complaint). The Contra Costa Complaint is brought on behalf of five California municipal entities and the non-profit Jewish Community Center of San
Francisco. The Alameda Complaint is brought on behalf of nineteen California municipal entities. The Olympic Club Complaint is brought on behalf of the non-profit Olympic Club. The three actions make similar allegations against Ambac Financial Group
and Ambac Assurance, various other financial guaranty insurance companies and employees thereof, and, in the case of the Contra Costa Complaint and the Olympic Club Complaint, the major credit rating agencies. The actions allege that (1) Ambac
and the other defendants colluded with the Rating Agencies to perpetuate a dual rating system pursuant to which the Rating Agencies rated the debt obligations of municipal issuers differently from corporate debt obligations, thereby
keeping municipal ratings artificially low relative to corporate ratings; (2) Ambac issued false and misleading financial statements which failed to disclose the extent of the insurers respective exposures to mortgage backed securities
and collateralized debt obligations; and (3) as a result of these actions, plaintiffs incurred higher interest costs and bond insurance premiums in respect of their respective bond issues. Ambac and the other financial guaranty insurance
companies filed a demurrer seeking the dismissal of each of these complaints on September 17, 2010. The plaintiffs filed their opposition papers to the demurrer on October 22, 2010. The reply papers in support of the demurrer are due on
November 19, 2010 with oral argument on the demurrer scheduled for December 14, 2010.

City of New Orleans v. Ambac
Assurance Corporation, Ambac Financial Services, LLC, PaineWebber Capital Services, Inc. and UBS Securities LLC (United States District Court, Eastern District of Louisiana, Civil Action No. 08-3949). This action was brought by the City of New
Orleans (New Orleans) against Ambac Assurance and Ambac Financial Services on July 17, 2008 in connection with Ambac Assurances participation in a New Orleans bond issue. New Orleans issued variable rate demand obligations
(VRDOs), which were insured by Ambac Assurance, and entered into an interest rate swap agreement with PaineWebber, Inc. in order to synthetically fix its interest rate on the VRDOs. PaineWebber in turn entered into an
interest rate swap agreement with Ambac Financial Services with terms that mirrored those of the New Orleans/Paine Webber swap. On December 23, 2009, the City filed an Amended Complaint in which it seeks damages against Ambac Assurance and
Ambac Financial Services alleging the following causes of action: (1) breach of written agreement for credit enhancement; (2) breach of financial guarantee policy; (3) error in the principal cause; (4) fraud in the inducement of
contract; (5) negligent misrepresentation; (7) breach of policy/third-party beneficiary to policy agreement; (8) breach of the swap; (9) tortious interference with the swap; (10) tortious interference with remarketing
agreement; and (11) detrimental reliance. On October 14, 2010, the Court approved a motion to dismiss all claims against Ambac Assurance and Ambac Financial Services.

NPS LLC v. Ambac Assurance Corporation (United States District Court, District of Massachusetts, filed on July 8, 2008). This action
was brought by NPS LLC (NPS), the owner of Gillette Stadium, the home stadium of the New England Patriots, with respect to the termination of a financial guaranty insurance policy issued by Ambac Assurance with respect to auction rate
bonds issued by NPS in 2006. Due to well-documented disruption of the auction rate securities market, the interest rate on the bonds floated to high levels and NPS therefore refinanced the bonds in a fixed rate



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financing without Ambac Assurances involvement. Pursuant to the insurance agreement between NPS and Ambac Assurance, NPS is obligated to pay a make whole premium to Ambac
Assurance equal to the present value of the installment premiums that Ambac Assurance would have earned through 2017 if the bonds had not been redeemed (approximately $2.7 million). NPS alleged that it is not liable to pay the make whole
premium because Ambac Assurance misrepresented its financial condition at the time the bonds were issued and that the alleged misrepresentations induced NPS to enter into the insurance agreement, thereby causing NPS to incur additional interest
costs in connection with the bonds. NPS also alleged that Ambac Assurance was liable to NPS for the additional interest costs incurred by NPS which resulted from the disruption of the auction rate securities market. On February 25, 2010, the
court granted Ambac Assurances motion for summary judgment as to all of NPSs claims and Ambac Assurances counterclaim for the make whole premium and interest and costs. The parties are awaiting a determination by the
court of the amount of Ambac Assurances legal fees that NPS will be required to pay. NPS has stated that it intends to appeal the grant of summary judgment in favor of Ambac Assurance.

City of Phoenix v. Ambac Assurance Corporation et al. (United States District Court, District of Arizona, filed on or about
March 11, 2010). The parties stipulated to substitute Ambac Assurance Corporation for Ambac Financial Group as a defendant on July 30, 2010. Pursuant to the Courts Scheduling Order, discovery is scheduled to be completed by
October 3, 2011, with dispositive motions due by November 1, 2011. This action is brought by the City of Phoenix against Ambac Assurance and other financial guaranty insurance companies. The complaint alleges that the defendants sought to
perpetuate the Rating Agencies dual rating system, and that the perpetuation of the dual rating system enabled the defendants to unfairly discriminate against the City of Phoenix in the pricing of bond insurance
premiums.

Water Works Board of the City of Birmingham v. Ambac Financial Group, Inc. and Ambac Assurance Corporation (United
States District Court, Northern District of Alabama, Southern Division, filed on November 10, 2009). This action alleged breach of contract, misrepresentation, deceit, suppression of truth and negligence. Plaintiff claims that, in connection
with plaintiffs purchase of a debt service reserve fund surety bond from Ambac Assurance in March 2007 with respect to its bond issue, Ambac Assurance misrepresented the stability of its AAA financial strength ratings and
subsequently breached a covenant to maintain its AAA ratings, thereby causing loss to plaintiff when it was required to replace the Ambac Assurance surety bond upon the downgrade of Ambac Assurances ratings. On April 1, 2010,
the court granted defendants motion to dismiss all claims. The plaintiff has appealed the dismissal to the U.S. Court of Appeals for the Eleventh Circuit.

Baylor College of Medicine v. Ambac Financial Group, Inc. and Ambac Assurance Corporation (United States District Court, Southern District of Texas, Houston Division, filed on November 13, 2009).
This action alleges breach of contract, violation of Texas insurance statute, negligent misrepresentation, fraud and fraudulent inducement. Plaintiff claims that, in connection with plaintiffs purchase of a bond insurance policy with respect
to its auction rate bond issue in November 2007, Ambac Assurance misrepresented its financial position and the stability of its AAA financial strength ratings in both public and nonpublic disclosures thereby causing loss to plaintiff. On
March 15, 2010, defendants filed a motion to dismiss all of the plaintiffs claims. Before the court decided defendants motion to dismiss, plaintiff agreed to the dismissal of the entire action with prejudice, which occurred on
October 14, 2010.

The Confederated Tribes of the Warm Springs Reservation of Oregon v. Ambac Assurance Corporation
(United States District Court, District of Oregon, Portland Division, filed on February 4, 2010). This action alleges breach of contract, tortious breach of the covenant of good faith and fair dealing, violations of Oregon securities and
insurance statutes, and negligence. Plaintiff claims that, in



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connection with plaintiffs purchase of a bond insurance policy with respect to its auction rate bond issue in October 2003, Ambac Assurance misrepresented the stability of its
AAA financial strength ratings and subsequently breached an implied covenant by underwriting residential mortgage-backed securities and collateralized debt obligations that ultimately led to the loss of the AAA financial
strength ratings. Ambac Assurance has moved to dismiss all of the plaintiffs claims and the motion has been fully briefed and argued and is awaiting decision. In the meantime, the plaintiff has filed a second amended complaint, which Ambac
Assurance will also move to dismiss.

Ambac Assurance Corporation v. Adelanto Public Utility Authority (United States District
Court, Southern District of New York, filed on June 1, 2009). Ambac Assurance commenced this action to recover $4,524 from the defendant on account of Ambac Assurances payment under a swap termination surety bond. The defendant has
counterclaimed (as amended on June 12, 2010), alleging breach of contract, breach of the covenant of good faith and fair dealing, violations of California insurance statutes, fraud and promissory estoppel. Defendant claims that, in connection
with defendants purchase of a bond insurance policy with respect to its variable rate bond issue in September 2005, Ambac Assurance misrepresented the stability of its AAA financial strength ratings and subsequently breached an
implied covenant by underwriting risky structured obligations that ultimately led to the loss of the AAA ratings. Ambac Assurance has moved to dismiss all of the defendants counterclaims and that motion has been fully briefed.

Ambac Assurance has also received various regulatory inquiries and requests for information. These include a subpoena duces
tecum and interrogatories from the Securities Division of the Office of the Secretary of the Commonwealth of Massachusetts (the Secretary of Massachusetts), dated January 18, 2008, that seeks certain information and documents
concerning Massachusetts Public Issuer Bonds. Ambac Assurance has also received subpoenas from the Office of the Attorney General, State of Connecticut (the Connecticut Attorney General) with respect to the
Connecticut Attorney Generals investigation into municipal bond rating practices employed by the credit rating agencies. The focus of the investigation appears to be the disparity in ratings with respect to municipal and corporate
credits, respectively. Insofar as Ambac Assurance is concerned, the Connecticut Attorney General has sought information with respect to communications between the credit rating agencies and the financial guarantee insurance industry (acting
through the Association of Financial Guaranty Insurers, the industry trade association) in relation to proposals by the Rating Agencies to implement a corporate equivalency rating system with respect to municipal credits. Ambac Assurance has
also received a subpoena duces tecum and interrogatories from the Attorney General of California (the California Attorney General) dated December 15, 2008 related to the California Attorney Generals investigation of credit
rating agencies in the rating of municipal bonds issued by the State of California and its related issuers. The subpoena requests that Ambac Assurance produce a wide range of documents and information. Ambac has also received a subpoena and
interrogatories from the Attorney General of West Virginia (the WVAG), dated June 17, 2009, with respect to the WVAGs investigation of possible antitrust violations in connection with the use of swaps, guaranteed investment
contracts and other derivatives and investment vehicles related to municipal bonds issued by West Virginia governmental entities. The WVAG has sought, among other things, information and documents relating to any such swaps, guaranteed
investment contracts and other derivatives and investment vehicles sold by Ambac Assurance to a West Virginia governmental entity or for which Ambac Assurance submitted a bid or offer that was not the winning bid. Ambac Assurance has not received
any further requests from the Secretary of Massachusetts, the Connecticut Attorney General, the California Attorney General or the WVAG,

An insurance rehabilitation proceeding was commenced in the Wisconsin Circuit Court for Dane County on March 24, 2010 by the Commissioner of Insurance of the State of Wisconsin (the
Commissioner). The principal parties to this proceeding are the Commissioner and the Segregated



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Account, which was established with the permission of the Commissioner, pursuant to Wis. Stat. § 611.24(2), for certain policies and liabilities placing AAC at risk. The factual basis
alleged to underlie this proceeding is that court-supervised rehabilitation was required in order to avoid further deterioration of Ambac Assurances financial condition through the payment of claims and other demands. The ultimate relief
sought is a plan of rehabilitation that will reform and revitalize the Segregated Account.

On March 24, 2010, the court
entered an order of rehabilitation for the Segregated Account, appointing the Commissioner as rehabilitator. Policies and other liabilities were allocated to the Segregated Account if they had current or projected material impairments or contractual
triggers creating a risk of default based upon Ambac Assurances financial condition or the existence of rehabilitation proceedings. The remainder of Ambac Assurances business is not subject to rehabilitation. The Commissioner concluded
that rehabilitation of the Segregated Account would preserve Ambac Assurances claims-paying resources, while avoiding the disruption and additional claims that would likely result from a full rehabilitation of Ambac Assurance, as opposed to a
rehabilitation limited to the Segregated Account.

Also on March 24, 2010, the court entered a temporary injunction order
that, until further order of the court: (a) prevents the exercise of certain contractual ipso facto provisions; (b) enjoins payment of claims or obligations without consent from the Commissioner or his authorized representatives;
and (c) requires the continued payment of premiums. The court further ordered that any interested party could seek modification or dissolution of the injunction, in whole or in part, by filing a written motion by June 22, 2010.

Various third parties have filed motions or objections in the rehabilitation court and/or moved to intervene in the rehabilitation
proceedings. These challenges can be divided into three groups.

First, several third parties sought to enjoin the
consummation of a commutation transaction between the General Account and certain financial institutions that were counterparties to credit-default swaps wrapped by AAC (the CDS Settlement). Initial challenges to the CDS Settlement were
brought by: (a) a group composed of Aurelius Capital Management, LP, Fir Tree, Inc., King Street Capital, L.P., King Street Capital Master Fund Ltd., Monarch Alternative Capital LP, and Stonehill Capital Management LLC and their respective
managed funds (the RMBS Investors); and (b) certain beneficial holders of the Las Vegas Monorail Project Revenue Bonds (the LVM Bondholders). A number of other institutions, including Bank of New York Mellon, U.S. Bank
N.A., Deutsche Bank National Trust Co. and Deutsche Bank Trust Co. Americas, in their capacities as trustees of securitization trusts, as well as Federal Home Loan Mortgage Corp., joined these challenges to the CDS Settlement, in whole or in part.
On May 27, 2010, the court entered an order denying all challenges to the CDS Settlement, and the CDS Settlement was consummated on June 7, 2010. The RMBS Investors, the LVM Bondholders and Federal Home Loan Mortgage Corp. are appealing
from the courts May 27, 2010 order.

Second, a number of third parties have objected to the creation and
rehabilitation of the Segregated Account on constitutional, statutory and common law grounds. The first such challenge was filed by Wells Fargo Bank, N.A., in its capacity as trustee for the beneficial owners of the Las Vegas Monorail Project
Revenue bonds. The RMBS Investors filed similar challenges, which were denied in the May 27, 2010 order. The LVM Bondholders objected to the allocation of their policies to the Segregated Account. This motion and the motion filed by Wells Fargo
were denied in an order entered on July 16, 2010. On August 2, 2010, the LVM Bondholders filed a notice of appeal from this order.



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Additional third
parties have challenged the creation and rehabilitation of the Segregated Account and/or the allocation of their policies to the Segregated Account, including Deutsche Bank National Trust Co., Deutsche Bank Trust Co. Americas and U.S. Bank National
Association, all in their capacities as trustees for securitization trusts, as well as PNC Bank, N.A., as servicer of a securitization trust, and ALL Student Loan Corp., Lloyds TSB Bank plc, Depfa Bank, plc, One State Street LLC, KnowledgeWorks
Foundation and the Treasurer of the State of Ohio. The motion filed by PNC Bank was never briefed or decided, but the other challenges were rejected in an order filed on October 26, 2010. Several parties have sought to appeal from this order
and additional appeals are expected.

Third, certain third parties filed motions seeking dissolution or modification of the
courts temporary injunction order on constitutional, statutory and common law grounds. These objectors include Bank of America, N.A., Bank of New York Mellon, Deutsche Bank National Trust Co., Deutsche Bank Trust Co. Americas, U.S. Bank
National Association, and Wells Fargo Bank, N.A., all in their capacities as trustees for securitization trusts, as well as PNC Bank, N.A., as servicer of a securitization trust, and KnowledgeWorks Foundation, the Treasurer of the State of Ohio,
Depfa Bank plc, and One State Street LLC. The motion filed by PNC Bank was never briefed or decided, but the other motions were denied in an order filed on October 26, 2010. Several parties have sought to appeal from this order and additional
appeals are expected.

On October 8, 2010, the Commissioner filed a proposed Plan of Rehabilitation, Disclosure
Statement, and other materials in support of his motion for confirmation of the proposed Plan of Rehabilitation. Objections to the Plan of Rehabilitation were due on November 8, 2010, and responses to these objections were filed on
November 12, 2010. Hearings regarding whether to approve, disapprove, or modify the Plan of Rehabilitation are scheduled to begin on November 15, 2010.

Ambac Assurances CDS portfolio experienced significant losses. The majority of these CDS contracts are on a pay as you go basis, and we believe that they are properly characterized as
notional principal contracts for U.S. federal income tax purposes. Generally, losses on notional principal contracts are ordinary losses. However, the federal income tax treatment of credit default swaps is an unsettled area of the tax law. As such,
it is possible that the Internal Revenue Service may decide that the pay as you go CDS contracts should be characterized as capital assets or that certain payments made with respect to the CDS contracts should be characterized as capital
losses. Recently, the Internal Revenue Service opened an examination into certain issues related to Ambac Assurances tax accounting methods with respect to such CDS contracts and Ambac Assurances related characterization of such losses
as ordinary losses. Although, as discussed above, Ambac Assurance believes these contracts are properly characterized as notional principal contracts, if the Internal Revenue Service today were to successfully assert, as a result of its examination,
that these contracts should be characterized as capital assets or as generating capital losses, Ambac Assurance would be subject to both a substantial reduction in its net operating loss carryforwards and would suffer a material assessment for
federal income taxes. On November 9, 2010, the Company and the IRS agreed to a stipulation on the record that provides that the IRS would give notice at least 5 business days prior to taking any action against the Companys nondebtor
subsidiaries in the consolidated tax group that would violate the State Court Injunction, whether or not in effect. The stipulation permits the status quo to be maintained from November 9, 2010 until a hearing on the preliminary injunction that the
Company plans to seek under Bankruptcy Code section 105(a) barring assessment and collection of the 2003 through 2008 tax refunds by the IRS against the Companys nondebtor subsidiaries in the consolidated tax group. On the same date, Ambac
filed and served a complaint against the IRS for a declaratory judgment relating to the tax refunds.

Ambac is involved from
time to time in various routine legal proceedings, including proceedings related to litigation with present or former employees. Although Ambacs litigation with present or former employees is routine and incidental to the conduct of its
business, such litigation can result in large monetary awards when a civil jury is allowed to determine compensatory and/or punitive damages for, among other things, termination of employment that is wrongful or in violation of implied contracts.

In the ordinary course of their businesses, certain of Ambacs subsidiaries assert claims in legal proceedings against
third parties to recover losses already paid and/or mitigate future losses. The amounts recovered and/or losses avoided which may be result from these proceedings is uncertain, although recoveries and/or losses avoided in any one or more of these
proceedings during any quarter or fiscal year could be material to Ambacs results of operations in that quarter or fiscal year.

In connection with Ambacs efforts to seek redress for breaches of representations and warranties related to the information provided by both the underwriters and the sponsors of various
transactions and for failure to comply with the obligation by the sponsors to repurchase ineligible loans, it has filed the following lawsuits. Ambac Assurance Corporation v. EMC Mortgage Corporation (United States
District Court, Southern District of New York, filed on November 5, 2008). On July 28, 2010, Ambac made a motion to amend the complaint to add allegations of fraudulent conduct on the part of EMCs affiliate Bear,
Stearns & Co., Inc. (now known as J. P. Morgan Securities Inc.), (and certain individual defendants) in addition to the breach of contract and indemnification and reimbursement claims against EMC filed in the original complaint.
On August 5, 2010, defendants submitted a motion to seal the amended complaint. Ambac Assurance Corporation and the Segregated Account of Ambac Assurance Corporation v. DLJ Mortgage Capital, Inc. and Credit Suisse Securities (USA) LLC
(Supreme Court of the State of New York, County of New York, filed on January 12, 2010. Ambac has alleged breach of contract, fraudulent inducement, breach of implied duty of good faith and fair dealing, indemnification, reimbursement and
requested the repurchase of loans that breach representations and warranties as required under the contracts, as well as damages. Ambac Assurance Corporation and The Segregated Account of Ambac Assurance Corporation v. Countrywide Home Loans,
Inc., Countrywide Securities Corp., Countrywide Financial Corp (n.k.a. Bank of America Home Loans) and Bank of America Corp. (Supreme Court of the State of New York, County of New York, filed on September 28, 2010). Ambac has alleged breach of
contract, fraudulent inducement, indemnification and reimbursement, breach of representations and warranties and has requested the repurchase of loans that breach representations and warranties as required under the contracts as well as damages and
has asserted a successor liability claim against Bank of America.



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It is not possible
to predict whether additional suits will be filed or whether additional inquiries or requests for information will be made, and it is also not possible to predict the outcome of litigation, inquiries or requests for information. It is possible that
there could be unfavorable outcomes in these or other proceedings. Legal accruals for certain litigation matters discussed above, and managements estimated range of loss for such matters, are not material to the operating results or financial
position of the Company. For all other litigation matters, management is unable to make a meaningful estimate of the amount or range of loss that could result from unfavorable outcomes but, under some circumstances, adverse results in any such
proceedings could be material to our business, operations, financial position, profitability or cash flows. The Company believes that it has substantial defenses to the claims raised in these lawsuits and, to the extent that these actions proceed,
the Company intends to defend itself vigorously; however, the Company is not able to predict the outcomes of these actions.

Item 1A  Risk Factors

Ambac has updated its risk factors as previously disclosed in its Form 10-K for the
year ended December 31, 2009. These risk factors should be read together with the risk factors included in Part I, Item 1A of our Form 10-K for the year ended December 31, 2009. References in the risk factors to Ambac are
to Ambac Financial Group, Inc. References to we, our and us are to Ambac, Ambac Assurance Corporation, Everspan Financial Guarantee Corp., and Ambac Credit Products LLC as the context requires.

A long period of operations under Chapter 11 protection may harm our business.

As with any judicial proceeding, there are risks of unavoidable delay with a Chapter 11 proceeding and there are risks of objections from
certain stakeholders, including objections from the holders of unsecured notes and any prepetition lenders that vote to reject a plan of reorganization. Any material delay in the confirmation of a plan, or the threat of rejection of the plan by
the Bankruptcy Court, would not only add substantial expense and uncertainty to the process, but also would adversely affect our operations during this period.

So long as the Chapter 11 proceeding continues, our senior management will be required to spend a significant amount of time and effort working on the reorganization instead of focusing exclusively on our
business operations. A prolonged period of operating under Chapter 11 protection may also make it more difficult to attract and retain management and other key personnel necessary to effect a successful reorganization.

Furthermore, so long as the Chapter 11 proceedings continue, we will be required to incur substantial costs for professional fees and
other expenses associated with the administration of the Chapter 11 proceedings. A prolonged continuation of the Chapter 11 proceedings may also require us to seek additional financing. If we require additional financing during the Chapter 11
proceedings and we are unable to obtain the financing on favorable terms or at all, our chances of successfully reorganizing our businesses may be seriously jeopardized, and as a result, our assets and securities could become further devalued or
worthless.



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Under the
Bankruptcy Code, all debtors must obtain Bankruptcy Court approval to, among other things:



| |  |  | sell assets or engage in other actions outside the ordinary course of business;
| | - |  | -------------------------------------------------------------------------------



| |  |  | consolidate, merge, sell or otherwise dispose of all or substantially all of our assets; and
| | - |  | --------------------------------------------------------------------------------------------



| |  |  | obtain financing secured by our assets.
| | - |  | ---------------------------------------

In addition, if a trustee is appointed to operate us while in Chapter 11 bankruptcy, the trustee would assume control of our assets.

While management believes that Ambac will have sufficient liquidity to satisfy its needs until it emerges from the bankruptcy proceeding,
no guarantee can be given that it will be able to pay all such expenses. If its liquidity runs out prior to emergence from bankruptcy, a liquidation of the Company pursuant to Chapter 7 of the Bankruptcy Code will occur. While Ambacs NOLs
could be used to offset income or gain realized prior to a completion of a liquidation, the NOLs would not be available following the liquidation or sale of Ambacs assets. As a result, in the event of a Chapter 7
liquidation, Ambac is likely to be unable to utilize a substantial portion of its NOLs.

There is
significant uncertainty as to how Ambacs securityholders will be treated under any plan of reorganization.

To
date, Ambac has been unable to agree to terms with an ad-hoc committee of certain senior debt holders in order to restructure its outstanding debt through a prepackaged bankruptcy proceeding. However, Ambac has agreed to a non-binding term sheet
that will serve as a basis for further negotiations with the ad-hoc committee and that may allow Ambac to emerge from bankruptcy more expeditiously. Because a plan of reorganization (a Reorganization Plan) has not yet been agreed to,
there is significant uncertainty as to how holders of Ambacs securities will be treated under the Reorganization Plan. It is likely, however, that Ambacs debtholders and creditors will receive all equity in the company.

There can be no assurance that the Bankruptcy Court will confirm a Reorganization Plan.

There can be no assurance that the Bankruptcy Court will conclude that a Reorganization Plan will satisfy all requirements necessary for
confirmation by the Bankruptcy Court or that modifications of the Reorganization Plan will not be required for confirmation or that such modifications would not necessitate resolicitation of votes.

A Reorganization Plan will not be confirmed by the Bankruptcy Court unless it concludes that the Reorganization Plan does not
discriminate unfairly and is fair and equitable with respect to certain classes in the Chapter 11 Filing.

In the event any impaired class of claims or equity interests does not accept a plan of reorganization, a bankruptcy court may nevertheless confirm such plan at the proponents request if at least
one impaired class has accepted the plan (with such acceptance being determined without including the vote of any insider in such class), and as to each impaired class that has not accepted the plan, the bankruptcy court determines that
the plan does not discriminate unfairly and is fair and equitable with respect to the dissenting impaired classes. Because certain classes in the Bankruptcy Filing will likely be deemed to reject any Reorganization Plan,
these requirements must be satisfied with respect to such classes in the Bankruptcy Filing. If these classes assert that the Reorganization Plan does not meet these requirements, there is no assurance that the Bankruptcy Court will confirm the
Reorganization Plan.



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Pursuit of
litigation by the parties in interest could disrupt the confirmation of a Reorganization Plan and could have material adverse effects on our businesses and financial condition.

There can be no assurance that any of the parties in interest will not pursue litigation strategies to enforce any claims against us.
Litigation is by its nature uncertain and there can be no assurance of the ultimate resolution of any such claims. Any litigation may be expensive, lengthy, and disruptive to our normal business operations and the Reorganization Plan confirmation
process, and a resolution of any such strategies that is unfavorable to us could have a material adverse affect on the Reorganization Plan confirmation process or their respective businesses, results of operations, financial condition, liquidity or
cash flow.

Historical financial information may not be comparable.

Following confirmation of a Reorganization Plan and the transactions contemplated thereby, our financial condition and results of
operations from and after the effective date of the Reorganization Plan may not be comparable to the financial condition or results of operations reflected in our historical financial statements.

The occurrence of certain events could result in the initiation of delinquency proceedings against Ambac Assurance, with resulting
adverse consequences to holders of Ambac securities.

Certain policyholders whose policies were allocated to the
Segregated Account have filed objections in the Segregated Account Rehabilitation Proceedings challenging, inter alia,the establishment of the Segregated Account and the implementation of the Settlement Agreement. If such challenges are
successful, OCI may determine that it is in the best interests of policyholders to initiate delinquency proceedings with respect to Ambac Assurance. Similarly, if negotiations among Ambac, the ad hoc committee of bondholders, OCI and the
rehabilitator of the Segregated Account do not produce an agreement among the parties, Ambac (or its creditors) could take actions which would adversely affect Ambac Assurance and/or the Segregated Account. As such, OCI may determine that it is in
the best interests of policyholders to initiate rehabilitation proceedings with respect to Ambac Assurance, either preemptively or in response to any such action. Finally, the incurrence of large losses in respect of policies in the general account
of Ambac Assurance and other unknown contingencies (including disputes between Ambac and Ambac Assurance and/or the Segregated Account) might occur which would prompt OCI to initiate delinquency proceedings with respect to Ambac Assurance.

If, as a result of the occurrence of any such event(s), the OCI decides to initiate delinquency proceedings with respect to
Ambac Assurance, adverse consequences may result, including, without limitation, the assertion of damages by counterparties (including mark-to-market claims with respect to insured transactions executed in ISDA format) and the acceleration of losses
based on early termination triggers and the loss of control rights in insured transactions, thereby reducing the residual value of Ambac Assurance. Additionally, the rehabilitator would assume control of all of Ambac Assurances assets and
management of Ambac Assurance. In exercising control, the rehabilitator will act for the benefit of policyholders, and will not take into account the interests of securityholders of Ambac; such actions may result in material adverse consequences for
Ambacs securityholders.In addition, the initiation of delinquency proceedings against Ambac Assurance would further decrease the likelihood that OCI will permit Ambac Assurance to make dividend payments to Ambac.



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Characterization of losses on CDS portfolio as capital losses for U.S. federal tax purposes could result in a material assessment
for federal income taxes.

Ambac Assurances CDS portfolio experienced significant losses. The majority of these
CDS contracts are on a pay as you go basis, and we believe that they are properly characterized as notional principal contracts for U.S. federal income tax purposes. Generally, losses on notional principal contracts are ordinary losses.
However, the federal income tax treatment of credit default swaps is an unsettled area of the tax law. As such, it is possible that the Internal Revenue Service may decide that the pay as you go CDS contracts should be characterized as
capital assets or that certain payments made with respect to the CDS contracts should be characterized as capital losses. As of September 30, 2010, Ambac had net operating losses (NOLs) amounting to approximately $7.6 billion for
federal income tax purposes. Recently, the Internal Revenue Service opened an examination into certain issues related to Ambac Assurances tax accounting methods with respect to such CDS contracts and Ambac Assurances related
characterization of such losses as ordinary losses. Although, as discussed above, Ambac Assurance believes these contracts are properly characterized as notional principal contracts, if the Internal Revenue Service today were to successfully assert,
as a result of its examination, that these contracts should be characterized as capital assets or as generating capital losses, Ambac Assurance would be subject to both a substantial reduction in its net operating loss carryforwards and would suffer
a material assessment for federal income taxes. Such assessments and reductions in net operating loss carryforwards would have a material adverse impact on our financial condition. Such assessments related to the tentative refunds may
be made by the Internal Revenue Service at any time and, without prior notice to Ambac, pursuant to Internal Revenue Code section 6213(b). The Internal Revenue Service may then file a lien that attaches to Ambacs property
interests, including the property interests of any member of the consolidated tax group, and commence collection efforts. If these events occur, Ambacs rehabilitation plan may be materially impacted and Ambacs ability
to effectively reorganize may be seriously jeopardized. On the same date, Ambac filed and served a complaint against the IRS for a declaratory judgment relating to the tax refunds.

The Ambac Assurance NOL (and certain other tax attributes or tax benefits of the Ambac Consolidated Tax Group) may be subject to
limitation as a result of a the bankruptcy reorganization.

Under Section 382 of the Internal Revenue Code of
1986, as amended (the Code), if a loss corporation (generally, a corporation with NOLs and/or built-in losses) undergoes an ownership change, the amount of such corporations pre-ownership change NOLs that
may be utilized to offset future taxable income generally is subject to an annual limitation (the Annual Section 382 Limitation). In general, the amount of the Annual Section 382 Limitation is equal to the product of
(1) the fair market value of the stock of the corporation (or, in the case of a consolidated group, generally the stock of the common parent) immediately before the ownership change (with certain adjustments) and (2) the long-term
tax-exempt rate in effect for the month in which the ownership change occurs (for example, 3.86 percent for an ownership change that occurs during November 2010). In general, an ownership change occurs if shareholders owning 5
percent or more of the corporations stock increase their ownership by greater than 50 percentage points over a three-year testing period.

As a result of the Bankruptcy Filing it is likely that Ambac would undergo an ownership change for purposes of section 382 of the Code as a result of implementation of a bankruptcy plan of
reorganization. Ambac hopes to qualify under a special exception contained in section 382(l)(5) of the Code (the L5 Exception) in order to avoid an ownership change as a result of the implementation of the bankruptcy plan of
reorganization; however, Ambacs ability to qualify for such exception is subject to a number of factors, many of which are beyond our control. For example, extensive buying of Ambacs debentures prior to a bankruptcy filing by persons who
could hold 5 percent or more of the Ambac stock following a bankruptcy reorganization could prevent Ambac from qualifying for the L5 Exception. As such, it is possible that Ambac will not qualify for the L5 Exception.



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If Ambac does not
qualify for the L5 Exception, the bankruptcy plan of reorganization will adversely impact the preservation of the Ambac Assurance NOL, and some or all of Ambacs taxable income after the reorganization may be subject to tax.

Our inability to realize the remediation recoveries included in our loss reserves could adversely impact our liquidity and
financial condition.

As of September 30, 2010, we have estimated subrogation recoveries of $2,395.5 million, an
increase from $2,026.3 million as of December 31, 2009. The amount of the estimated recovery is included in our loss reserves. These recoveries are based principally on contractual claims arising from RMBS transactions which we have insured,
and represent our estimate of the amount we will ultimately recover. However, our ability to recover these amounts is subject to significant uncertainty, including risks inherent in litigation, collectability of such amounts from counterparties
and/or their respective parents and affiliates, timing of receipt of any such recoveries, regulatory intervention which could impede our ability to take the actions required to realize such recoveries and uncertainty inherent in the assumptions used
in estimating such recoveries. The amount of these subrogation recoveries is significant and if we were unable to recover any amounts our stockholders deficit as of September 30, 2010 would increase from $1,217.6 million to $3,613.0
million.

The aggregate subrogation recoveries inherent in our loss reserves derives from contractual claims that we are
pursuing with respect to certain RMBS transaction which we have insured. In these transactions, the sponsor of the insured RMBS transactions provided representations and warranties with respect to the securitized loans contemporaneous with the
issuance of our financial guaranty insurance policy, relating to, among other things, the loan characteristics, the absence of fraud or other misconduct in the origination process, including those attesting to the compliance of home loans with the
prevailing underwriting policies. Pursuant to the transaction documents, the sponsor of the transaction is contractually obligated to repurchase, cure or substitute any loan that breaches the representations and warranties. We are seeking to enforce
our contractual rights to require the sponsors to repurchase loans which do not comply with the representations and warranties. To substantiate such claims, we have engaged mortgage underwriting consultants to conduct forensic re-underwriting of
securitized mortgage loans and analyze whether such loan underwriting was in compliance with the representations and warranties provided by the sponsor. Where mortgage loans are noncompliant, we submit such loans to the sponsors for repurchase. In
most cases, the sponsors have refused to repurchase such loans, and we have proceeded to initiate lawsuits seeking performance by the sponsors of their contractual obligations.

Ambacs estimate of subrogation recoveries includes two components: (1) estimated dollar amounts of loans with material
breaches of representations and warranties based on an extrapolation of the breach rate identified in a random sample of loans taken from the entire population of loans in a securitization (random sample approach) and (2) dollar
amount of actual loans with identified material breaches of representations and warranties discovered from samples of impaired loans in a securitization (adverse sample approach). We do not include estimates of consequential or punitive
damages in our estimate of subrogation recoveries under either approach. The amount the sponsors believe to be their liability for these breaches is not known.

The random sample approach to estimate subrogation recoveries was based on obtaining a statistically valid random sample for all the original loans in the pool. First, a breach rate was
computed by dividing (i) the loans identified in sample as having breached representations and



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warranties by (ii) the total sample size. Second, an extrapolation to the entire loan pool was performed by multiplying the breach rate by the sum of (a) the current unpaid loan pool
balance plus (b) realized losses resulting from loan liquidations or charge-offs to date, to compute an estimated repurchase obligation. Third, a realization factor was then applied to the estimated repurchase obligation to compute the
undiscounted subrogation recovery, which incorporates Ambacs views about the uncertainties surrounding the settlement negotiation and litigation processes. The realization factor was developed from a range of realization factors using
Ambacs own assumptions about the likelihood of outcomes based on all the information available to it including (i) discussions with external legal counsel and their views on ultimate settlement, (ii) recent experience with loan put
back negotiations where the existence of a material breach was debated and negotiated at the loan level, and (iii) the pervasiveness of the breach rates. Finally, a discount factor was applied to the undiscounted subrogation recovery to compute
the estimated subrogation recovery. While we believe that the assumptions used are reasonable, any variation of actual results from our assumptions could have a material impact on the size of our ultimate subrogation recovery. During the latter half
of 2009, Ambac expanded its use of the random sample approach for estimating the amount of subrogation recoveries to include all transactions where a statistically valid random sample of loan files was available.

The adverse sample approach to estimate subrogation recoveries was based on a sample taken from those loans in the pool that were
impaired, meaning loans greater than 90 days past due, charged-off, in foreclosure, REO or bankruptcy. The estimated subrogation recovery under this approach represents 100% of the original principal balance of those specific loans identified as
having not met the underwriting criteria or otherwise breaching representations and warranties (i.e. the adverse loans), multiplied by a discount factor using the same assumptions used for the discount factor in the random sample approach.

Ambac estimates that it will take approximately three years from the initiation of litigation with the sponsor to ultimate
resolution. Based on this estimate as a basis for projecting the future subrogation cash flows, Ambac assumes, on average, approximately three and a half years to collect recoveries, discounted at a risk-free rate of 2.50%. A longer recovery period
than expected could have a material impact on our ability to realize our remediation recoveries.

Actions of the
rehabilitator could adversely impact our ability to realize our remediation recoveries.

As a consequence of the
Segregated Account Rehabilitation Proceedings, the rehabilitator retains operational control and decision-making authority with respect to all matters related to the Segregated Account, including surveillance, remediation, loss mitigation and
efforts to recover losses in the Segregated Account, including recovery efforts in respect of breaches of representations and warranties by sponsors of Ambac-insured RMBS. Similarly, by virtue of the contracts executed between Ambac Assurance and
the Segregated Account in connection with the establishment, and subsequent rehabilitation, of the Segregated Account, the rehabilitator retains the discretion to oversee and approve certain actions taken by Ambac Assurance in respect of assets and
liabilities which remain in Ambac Assurance. As a result, any efforts to remediate losses, and any actions taken by Ambac Assurance, are subject to the approval of the rehabilitator. In exercising such authority, the rehabilitator will act for the
benefit of policyholders, and will not take into account the interests of securityholders of Ambac. Decisions made by the rehabilitator for the benefit of policyholders may result in material adverse consequences for Ambacs securityholders. In
addition, we are not able to predict the impact such oversight will have on the remediation of losses, and, in particular, on our efforts to recover losses attributable to breaches of representations and warranties by sponsors of Ambac-insured RMBS
and our ability to commute outstanding policies and repurchase surplus notes, nor whether the rehabilitator will pursue such remediation as vigorously as we have done in the past. In addition, as a result of the Segregated Account Rehabilitation
Proceedings, certain key personnel have chosen to leave Ambac, and additional people may decide to leave. The loss of such personnel could adversely impact Ambacs remediation efforts.



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Loss
reserves may not be adequate to cover potential losses; changes in loss reserves may result in further volatility of net income and earnings.

Loss reserves established with respect to our non-derivative financial guarantee insurance business are based upon estimates and judgments by management, including estimates and judgments with respect to
the probability of default, the severity of loss upon default and estimated remediation recoveries for, among other things, breaches by the issuer of representations and warranties. Loss reserves are established when management has observed credit
deterioration, in most cases, when the underlying credit is considered below investment grade. Furthermore, the objective of establishing loss reserve estimates is not to reflect the worst possible outcome. As such, there can be no assurance that
the actual losses in our financial guarantee insurance portfolio will not exceed our loss reserves. A further description of our accounting for loss and loss expenses can be found in Note 5 of the Notes to our Unaudited Consolidated Financial
Statements included in Item 1 of this Quarterly Report on Form 10-Q.

Additionally, inherent in our estimates of loss
severities and remediation recoveries is the assumption that we will retain control rights in respect of our insured portfolio. However, we are subject to the loss of control rights in many insured transactions, in the event that we are the subject
of delinquency proceedings and/or other regulatory actions which could result from our deteriorated financial position. In the event that we lose control rights, our ability to mitigate loss severities and realize remediation recoveries will be
compromised, and actual ultimate losses in our insured portfolio could exceed our loss reserves. On March 24, 2010, the rehabilitation court issued an injunction effective until further order of the court enjoining certain actions by holders of
policies in the Segregated Account and other counterparties, including the loss of control rights. If this injunction were successfully challenged, Ambac Assurance could lose its control rights with respect to policies in the Segregated Account.

Uncertainty with respect to the ultimate performance of certain of our insured exposures may result in substantial changes in
loss reserves. Correspondingly, such changes to loss reserves would affect our reported earnings. If we do not have sufficient liquidity to meet the increase in loss reserves, our insurance operating subsidiaries may become insolvent.

Risks which impact assets in our investment portfolio could adversely affect our business.

Over the past two years, our investment portfolio has been adversely affected by events and developments in the capital markets, including
decreased market liquidity for investment assets; market perception of increased credit risk with respect to the types of securities held in our investment portfolio and corresponding credit spread-widening with respect to our investment assets; and
extension of the duration of investment assets. Our investment portfolio may be further adversely affected by these and other events and developments in the capital markets, including interest rate movements; downgrades of credit ratings of
investment securities and/or financial guarantee insurers which insure investment securities; and foreign exchange movements which impact investment assets. At September 30, 2010, approximately 37% of our investment portfolio is insured by
financial guarantors, including Ambac. At September 30, 2010, approximately 11% of our investment portfolio comprises Alt-A mortgage-backed securities. Please refer to the table in Managements Discussion and Analysis of
Financial Condition and Results of OperationsBalance Sheet of this Quarterly Report on Form 10-Q, representing the fair value, including the value of the financial guarantee, and weighted-average underlying rating, excluding the
financial guarantee, of the insured securities at September 30, 2010.



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The following
table summarizes amortized cost and estimated fair value of investments at September 30, 2010:



|                                       |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |   |           | 
|-------------------------------------- |  | ------------- | --------- |  | -------------------- | - | ------- | --------------------- |  | - | ------------------- |  |  | - | --------- | 
|($ in thousands)                       |  | AmortizedCost |           |  | GrossUnrealizedGains |   |         | GrossUnrealizedLosses |  |   | EstimatedFair Value | 
|Fixed income securities:               |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |   |           | 
|Municipal obligations                  |  | $             | 2,064,009 |  |                      | $ | 129,098 |                       |  | $ | 2,607               |  |  | $ | 2,190,500 | 
|Corporate obligations                  |  |               | 893,210   |  |                      |   | 63,350  |                       |  |   | 24,812              |  |  |   | 931,748   | 
|Foreign obligations                    |  |               | 114,125   |  |                      |   | 6,951   |                       |  |   |                    |  |  |   | 121,076   | 
|U.S. government obligations            |  |               | 346,694   |  |                      |   | 12,920  |                       |  |   |                    |  |  |   | 359,614   | 
|U.S. agency obligations                |  |               | 82,000    |  |                      |   | 8,182   |                       |  |   | 2                   |  |  |   | 90,180    | 
|Residential mortgage-backed securities |  |               | 1,245,389 |  |                      |   | 257,951 |                       |  |   | 46,023              |  |  |   | 1,457,317 | 
|Collateralized debt obligations        |  |               | 41,534    |  |                      |   | 29      |                       |  |   | 13,353              |  |  |   | 28,210    | 
|Other asset-backed securities          |  |               | 1,002,567 |  |                      |   | 35,816  |                       |  |   | 54,621              |  |  |   | 983,762   | 
|Short-term                             |  |               | 617,748   |  |                      |   |        |                       |  |   |                    |  |  |   | 617,748   | 
|Other                                  |  |               | 100       |  |                      |   |        |                       |  |   |                    |  |  |   | 100       | 
|                                       |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |   |           | 
|Total investments                      |  | $             | 6,407,376 |  |                      | $ | 514,297 |                       |  | $ | 141,418             |  |  | $ | 6,780,255 | 
|                                       |  |               |           |  |                      |   |         |                       |  |   |                     |  |  |   |           | 

To the extent we liquidate large blocks of investment assets in order to pay claims under financial
guarantee insurance policies, to make payments under investment agreements and/or to collateralize our obligations under investment agreements and interest rate swaps, such investment assets may be sold at discounted prices which could be less than
the September 30, 2010 fair values shown in the above table.

Prior to the rating agency actions on Ambac Assurance,
Ambac Assurance managed its investment portfolio in accordance with rating agency standards for a AAA-rated insurance company. As a result of the significant declines in Ambac Assurances financial strength ratings, it is no longer necessary to
comply with the strict investment portfolio guidelines of a AAA-rated company. Therefore, Ambac Assurance has decided to invest a portion of its investment portfolio in lower-rated securities in order to increase the investment return on its
portfolio. However, the investment in lower-rated securities and alternative assets could expose Ambac to increased losses on its investment portfolio in excess of those described above and/or decrease the liquidity of the insured
portfolio. In addition, Ambac Assurances investment policies are subject to certain covenants made for the benefit of the Segregated Account and, as included in the Settlement Agreement, for the benefit of the Counterparties. Further, Ambac
Assurances investment policies are subject to oversight by the rehabilitator pursuant to contracts entered into between Ambac Assurance and the Segregated Account and, therefore, such policies may change. Any such changes could adversely
impact the performance of the investment portfolio.



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PART II  OTHER INFORMATION





Item 2  Unregistered Sales of Equity Securities and Use of Proceeds

The Board of Directors of Ambac has authorized the establishment of a stock repurchase program that permits the repurchase of up to
24,000,000 shares of Ambacs Common Stock. Ambac will only repurchase shares of its Common Stock under the repurchase program where it feels that it is economically attractive to do so and is in conformity with regulatory guidelines. The
following table summarizes Ambacs repurchase program during the third quarter of 2010 and shares available at September 30, 2010:



|                   |  |                          |        |  |                             |   |      |                                                                     |  |  |                                                                 |  |  |  |           | 
|------------------ |  | ------------------------ | ------ |  | --------------------------- | - | ---- | ------------------------------------------------------------------- |  |  | --------------------------------------------------------------- |  |  |  | --------- | 
|                   |  | Total SharesPurchased(1) |        |  | Average Price PaidPer
Share |   |      | Total Number ofShares Purchased asPart of PubliclyAnnounced Plan(1) |  |  | Maximum Numberof Shares 
That MayYet Be PurchasedUnder the Plan | 
|July 2010          |  |                          | 37,616 |  |                             | $ | 0.65 |                                                                     |  |  | 37,616                                                          |  |  |  | 3,052,452 | 
|August 2010        |  |                          |       |  |                             | $ |     |                                                                     |  |  |                                                                |  |  |  | 3,052,452 | 
|September 2010     |  |                          | 2,126  |  |                             | $ | 0.51 |                                                                     |  |  | 2,126                                                           |  |  |  | 3,050,326 | 
|                   |  |                          |        |  |                             |   |      |                                                                     |  |  |                                                                 |  |  |  |           | 
|Third quarter 2010 |  |                          | 39,742 |  |                             | $ | 0.64 |                                                                     |  |  | 39,742                                                          |  |  |  |           | 
|                   |  |                          |        |  |                             |   |      |                                                                     |  |  |                                                                 |  |  |  |           | 



|(1) | Shares repurchased during the third quarter 2010 were for the settlement of tax withholding amounts due for settling awards under Ambacs long-term incentive
plans.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------

From January 1, 2010 through November 4, 2010, Ambac did not repurchase any shares of its
Common Stock in the open market under its stock repurchase program.



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PART II  OTHER INFORMATION





Item 6  Exhibits

The following are annexed as exhibits:



|               |  |                                                                                                                                                                                                                                                                                                                                                                                      
|-------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit
Number |  | Description                                                                                                                                                                                                                                                                                                                                                                          
|               | 
|10.1           |  | Settlement Agreement, dated as of June 7, 2010, by and among Ambac Assurance Corporation, Ambac Credit Products, LLC, Ambac Financial Group, Inc and the parties listed on Schedule A
thereto.                                                                                                                                                                                       
|               | 
|31.1           |  | Certification of CEO Pursuant to Exchange Act Rules 13a-14 and 15d-14, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.                                                                                                                                                                                                                                         
|               | 
|31.2           |  | Certification of CFO Pursuant to Exchange Act Rules 13A-14 and 15D-14, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                         
|               | 
|32.1           |  | Certification of CEO Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                       
|               | 
|32.2           |  | Certification of CFO Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                       
|               | 
|99.1           |  | Interim order pursuant to Sections 105(a), 362, and 541 of the bankruptcy code establishing procedures for certain transfers of equity interests in and claims against the debtor and
scheduling a final hearing.                                                                                                                                                                    
|               | 
|99.2           |  | Interim order pursuant to Sections 105(a), 362, 363, and 364 of the bankruptcy code and bankruptcy rules 6003 and 6004 (i) authorizing debtor to continue using existing cash
management system and bank accounts and honor related prepetition obligations, (ii) extending debtors time to comply with section 345(b) of the bankruptcy code, and (iii) scheduling a final hearing.



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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.



|                         |  |  |  |                                          |  |                                                                                                                          
|------------------------ |  |  |  | ---------------------------------------- |  | -------------------------------------------------------------------------------------------------------------------------
|                         |  |  |  | Ambac Financial Group, Inc. (Registrant)
|                         |  |  | 
|Dated: November 15, 2010 |  |  |  | By:                                      |  | /S/    DAVID
TRICK                                                                                                       
|                         |  |  |  |                                          |  | David Trick                                                                                                              
|                         |  |  |  |                                          |  | Senior Managing Director, Chief
Financial Officer and Treasurer (Principal Financial Officer and Duly Authorized
Officer)



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INDEX TO EXHIBITS



|               |  |                                                                                                                                                                                                                                                                                                                                                                                      
|-------------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit
Number |  | Description                                                                                                                                                                                                                                                                                                                                                                          
|               | 
|10.1           |  | Settlement Agreement, dated as of June 7, 2010, by and among Ambac Assurance Corporation, Ambac Credit Products, LLC, Ambac Financial Group, Inc and the parties listed on Schedule A
thereto.                                                                                                                                                                                       
|               | 
|31.1           |  | Certification of CEO Pursuant to Exchange Act Rules 13a-14 and 15d-14, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                         
|               | 
|31.2           |  | Certification of CFO Pursuant to Exchange Act Rules 13A-14 and 15D-14, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                         
|               | 
|32.1           |  | Certification of CEO Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                       
|               | 
|32.2           |  | Certification of CFO Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                                       
|               | 
|99.1           |  | Interim order pursuant to Sections 105(a), 362, and 541 of the bankruptcy code establishing procedures for certain transfers of equity interests in and claims against the debtor and
scheduling a final hearing.                                                                                                                                                                    
|               | 
|99.2           |  | Interim order pursuant to Sections 105(a), 362, 363, and 364 of the bankruptcy code and bankruptcy rules 6003 and 6004 (i) authorizing debtor to continue using existing cash
management system and bank accounts and honor related prepetition obligations, (ii) extending debtors time to comply with section 345(b) of the bankruptcy code, and (iii) scheduling a final hearing.



158