UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549



FORM 10-Q



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

For the quarterly period ended December 31, 2008

or

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

Commission File Number of Issuing Entity: 333-150282-02

MacroShares $100 Oil Down Trust

(Exact name of issuing entity as specified in its charter)

Commission File Number of Depositor: 001-33173

MACRO SECURITIES DEPOSITOR, LLC

(Exact name of depositor as specified in its charter)

|                                |  |                    
|------------------------------- |  | -------------------
|New York                        |  | 26-2373481         
|(State or other jurisdiction of |  | (I.R.S. Employe    
|incorporation or organization)  |  | Identification No.)



c/o State Street Bank
and Trust Company, N.A.
Two World Financial Center
225 Liberty Street
New York, NY 10281

(917) 970-4284

(Address of principal executive offices, 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  þ   No  £

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer.

See definition of "accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange Act.

|                          |                     |                            |                          
|------------------------- | ------------------- | -------------------------- | -------------------------
|Large accelerated filer
 ̈ | Accelerated filer
 ̈ | Non-accelerated
Filer      | Smaller reporting
company
|                          |                     |  ̈                          | þ                        
|                          |                     | (Do not check if a 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  þ

Number of MacroShares $100 Oil Down shares outstanding as of December 31, 2008:  450,000

DOCUMENTS INCORPORATED BY REFERENCE:

Prospectus of MacroShares $100 Oil Down Trust shares, dated as of June 26, 2008, file no. 001-33173.







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FORWARD LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains various "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and within the Private Securities Litigation Reform Act of 1995, as amended. Forward-looking statements usually include the verbs, "anticipates," "believes," "estimates," "expects," "intends," "plans," "projects," "understands" and other verbs suggesting uncertainty. We remind readers that forward-looking statements are merely predictions and therefore inherently subject to uncertainties and other factors and involve known and unknown risks that could cause the actual results, performance, levels of activity, or achievements, or industry results, to be materially different from any future results, performance, levels of activity, or our achievements expressed or implied by such forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. The Trust undertakes no obligation to publicly release any revisions to these forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.



i





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TABLE OF CONTENTS

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Page
PART I FINANCIAL INFORMATION
1
Item 1.Financial Statements
1
Item 2.Managements Discussion and Analysis of Financial Condition and Results of Operations
18
Item 2A.Review of Financial Results
26
Item 3.Quantitative and Qualitative Disclosures about Market Risk
29
Item 4.Controls and Procedures
29
PART II.OTHER INFORMATION
30
Item 1.Legal Proceedings
30
Item 1A.Risk Factors
30
Item 2.         Unregistered Sales of Equity Securities and Use of Proceeds
30
Item 3.Defaults Upon Senior Securities
30
Item 4.Submission of Matters to a Vote of Security Holders
30
Item 5.Other Information
30
Item 6.Exhibits
31
|Exhibits
Exhibit 31.1
Certification Pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002
Exhibit 31.2
Certification Pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002
Exhibit 32.1
Certification Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the  Sarbanes-Oxley Act of 2002
Exhibit 32.2
Certification Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes Oxley Act of 2002                                                                                                                                                                       







ii





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PART I FINANCIAL INFORMATION

Item 1.

Financial Statements

MacroShares $100 Oil Down Trust

Statement of Financial Condition (Unaudited)



|                                                                                                                                               |  |                   |            | 
|---------------------------------------------------------------------------------------------------------------------------------------------- |  | ----------------- | ---------- | 
|                                                                                                                                               |  | December 31,
2008 |           
|Assets                                                                                                                                         |  |                   |           
|Cash and cash equivalents                                                                                                                      |  | $                 | 11,155,264 | 
|Settlement contracts and income distribution agreement with the Up Trust                                                                       |  |                   | 4,873,500  | 
|Interest receivable                                                                                                                            |  |                   | 3          | 
|                                                                                                                                               |  |                   |            | 
|Total assets                                                                                                                                   |  | $                 | 16,028,767 | 
|                                                                                                                                               |  |                   |            | 
|Liabilities and Shareholders Equity                                                                                                           |  |                   |            | 
|Operating expenses payable                                                                                                                     |  | $                 | 245,405    | 
|                                                                                                                                               |  |                   |            | 
|Total liabilities                                                                                                                              |  |                   | 245,405    | 
|                                                                                                                                               |  |                   |            | 
|Shareholders Equity                                                                                                                           |  |                   |            | 
|Equity attributable to Down MacroShares Trust, $25 par value, unlimited amount authorized, 450,000 issued and outstanding at December 31, 2008 |  |                   | 15,783,362 | 
|                                                                                                                                               |  |                   |            | 
|Total Shareholders Equity                                                                                                                     |  |                   | 15,783,362 | 
|                                                                                                                                               |  |                   |            | 
|Total Liabilities and Shareholders Equity                                                                                                     |  | $                 | 16,028,767 | 



See notes to the unaudited financial statements







1



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MacroShares $100 Oil Down Trust

Statement of Operations (Unaudited)

|                                                                                                  |  |                                              |           |   |                                                                                    |   |           |  
|------------------------------------------------------------------------------------------------- |  | -------------------------------------------- | --------- | - | ---------------------------------------------------------------------------------- | - | --------- | -
|                                                                                                  |  | For the Three
Months Ended
December 31,
2008 |           |   | For the period
from June 27, 2008
(commencement of
operations) to
December 31
2008 |  
|Investment Income                                                                                 |  |                                              |           |   |                                                                                    |  
|Interest income                                                                                   |  | $                                            | 8,510     |   |                                                                                    | $ | 85,992    |  
|Total investment income                                                                           |  |                                              | 8,510     |   |                                                                                    |   | 85,992    |  
|                                                                                                  |  |                                              |           |   |                                                                                    |   |           |  
|Expenses                                                                                          |  |                                              |           |   |                                                                                    |   |           |  
|Professional fees                                                                                 |  |                                              | 104,934   |   |                                                                                    |   | 236,624   |  
|Trustee fees                                                                                      |  |                                              | 53,751    |   |                                                                                    |   | 108,086   |  
|Insurance                                                                                         |  |                                              | 24,899    |   |                                                                                    |   | 48,417    |  
|Marketing Agent fees                                                                              |  |                                              | 9,286     |   |                                                                                    |   | 24,685    |  
|Administrative Agent fee                                                                          |  |                                              | 6,930     |   |                                                                                    |   | 18,422    |  
|Structuring and Licensing                                                                         |  |                                              | 4,573     |   |                                                                                    |   | 12,159    |  
|Printing                                                                                          |  |                                              | 3,781     |   |                                                                                    |   | 7,604     |  
|Miscellaneous                                                                                     |  |                                              | 520       |   |                                                                                    |   | 12,233    |  
|Total Expenses                                                                                    |  |                                              | 208,674   |   |                                                                                    |   | 468,230   |  
|Net investment loss                                                                               |  |                                              | (200,164  | ) |                                                                                    |   | (382,238  | )
|                                                                                                  |  |                                              |           |   |                                                                                    |   |           |  
|Realized and Unrealized Gain (Loss)                                                               |  |                                              |           |   |                                                                                    |   |           |  
|Net increase in unrealized appreciation on settlement contracts and income distribution agreement |  |                                              | 5,071,500 |   |                                                                                    |   | 5,738,000 |  
|Net realized gain on settlement contracts and income distribution agreement                       |  |                                              |         |   |                                                                                    |   | 2,739,000 |  
|Net realized and unrealized gain                                                                  |  |                                              | 5,071,500 |   |                                                                                    |   | 8,477,000 |  
|                                                                                                  |  |                                              |           |   |                                                                                    |   |           |  
|Net income                                                                                        |  | $                                            | 4,871,336 |   |                                                                                    | $ | 8,094,762 |  
|                                                                                                  |  |                                              |           |   |                                                                                    |   |           |  
|Net income per share  See Note J                                                                 |  | $                                            | 2.71      |   |                                                                                    | $ | 3.46      |  
|                                                                                                  |  |                                              |           |   |                                                                                    |   |           |  
|Weighted average shares outstanding  See Note J                                                  |  |                                              | 1,800,000 |   |                                                                                    |   | 2,339,362 |  



See notes to the unaudited financial statements







2



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MacroShares $100 Oil Down Trust

Statement of Changes in Shareholders Equity for the Period

from June 27, 2008 (commencement of operations)to December 31, 2008 (Unaudited)

|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|----------------------------------------- |  | ----------- | ----------- | - | -------- | - | ------ | ----- |  | - | ----------- | -
|                                          |  | Down        |             |   | Founders |   |        |       | 
|                                          |  | MacroShares |             |   | Equity   |   |        | Total | 
|                                          |  |             |             |   |          |   |        |       | 
|Shareholders Equity, beginning of period |  |             |           |   |          | $ | 1,000  |       |  | $ | 1,000       |  
|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|Contributions                             |  | $           | 19,604,600  |   |          |   |      |       |  |   | 19,604,600  |  
|Redemptions                               |  |             | (11,916,000 | ) |          |   | (1,000 | )     |  |   | (11,917,000 | )
|Net income                                |  |             | 8,094,762   |   |          |   |      |       |  |   | 8,094,762   |  
|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|Shareholders Equity, end of period       |  | $           | 15,783,362  |   |          | $ |      |       |  | $ | 15,783,362  |  
|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|Share Activity                            |  |             |             |   |          |   |        |       |  |   |             |  
|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|Shares outstanding, beginning of period   |  |             |           |   |          |   | 40     |       |  |   | 40          |  
|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|Contributions                             |  |             | 950,000     |   |          |   |      |       |  |   | 950,000     |  
|Redemptions                               |  |             | (500,000    | ) |          |   | (40    | )     |  |   | (500,040    | )
|                                          |  |             |             |   |          |   |        |       |  |   |             |  
|Shares outstanding, end of period         |  |             | 450,000     |   |          |   |      |       |  |   | 450,000     |  



See notes to the unaudited financial statements







3



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MacroShares $100 Oil Down Trust

Statement of Cash Flows for the Period

from June 27, 2008 (commencement of operations) to December 31, 2008 (Unaudited)

|                                                                                                                     |  |   |             |  
|-------------------------------------------------------------------------------------------------------------------- |  | - | ----------- | -
|Cash flows from operating activities:                                                                                |  |   |            
|                                                                                                                     |  |   |            
|Net income                                                                                                           |  | $ | 8,094,762   |  
|                                                                                                                     |  |   |             |  
|Adjustments to reconcile net income to net cash used in operating activities:                                        |  |   |             |  
|Net unrealized appreciation on settlement contracts and income distribution agreement                                |  |   | (5,738,000  | )
|Settlement payments in excess of  realized gains or losses on settlement contracts and income distribution agreement |  |   | (3,724,000  | )
|Increase (decrease) in operating assets and liabilities:                                                             |  |   |             |  
|Interest receivable                                                                                                  |  |   | (3          | )
|Operating expenses payable                                                                                           |  |   | 245,405     |  
|                                                                                                                     |  |   |             |  
|Net cash used in operations                                                                                          |  |   | (1,121,836  | )
|                                                                                                                     |  |   |             |  
|Cash flows from financing activities:                                                                                |  |   |             |  
|                                                                                                                     |  |   |             |  
|Contributions                                                                                                        |  |   | 23,727,140  |  
|Redemptions                                                                                                          |  |   | (11,451,040 | )
|                                                                                                                     |  |   |             |  
|Net cash provided by financing activities                                                                            |  |   | 12,276,100  |  
|                                                                                                                     |  |   |             |  
|Net increase in cash and cash equivalents                                                                            |  |   | 11,154,264  |  
|                                                                                                                     |  |   |             |  
|Cash and cash equivalents, beginning of period                                                                       |  |   | 1,000       |  
|Cash and cash equivalents, end of period                                                                             |  | $ | 11,155,264  |  



See notes to the unaudited financial statements







4



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS
as of December 31, 2008

A.

Organization

The MacroShares $100 Oil Down Trust (the Down Trust) is a trust formed under the laws of the State of New York by MACRO Securities Depositor, LLC (the Depositor), a Delaware limited liability company with MacroMarkets LLC as its sole member, on April 9, 2008 pursuant to a trust agreement entered into by the Depositor and State Street Bank and Trust Company, N.A., as trustee (in such capacity, the Trustee). The Down Trust Agreement was amended and restated in full on June 26, 2008 by the Trustee, the Depositor, MacroMarkets LLC, as administrative agent, and Macro Financial, LLC, as marketing agent (in such capacities, the Administrative Agent and the Marketing Agent). The Down Trust Agreement governs the activities of the Down Trust and specifies the terms of the Down Trust Shares. The Depositor has also formed the MacroShares $100 Oil Up Trust (the Up Trust and, together with the Down Trust, the Paired Trusts). The descriptions of the Paired Trusts in these notes reflect the provisions of the trust agreements as amended and restated as described above. Operations of the Down Trust commenced on June 27, 2008. No creations or other activity occurred between April 9, 2008 and the commencement date. On April 9, 2008, the Depositor and Administrative Agent each made an initial deposit of $500 into the Down Trust, for a total initial deposit of $1,000 (the Founders Equity). During the period ended June 30, 2008 the Founders Equity of the Down Trust was redeemed and returned to the Depositor and the Administrative Agent. Each of the Paired Trusts issues shares on a continuous basis (which are referred to, respectively, as Up MacroShares and Down MacroShares, and, collectively, as Paired Shares) in minimum aggregations called MacroShares Units, each of which consists of 50,000 Up MacroShares and 50,000 Down MacroShares. Paired Shares are issued at the direction of Authorized Participants (as defined herein). The objective of the Paired Trusts is, in the case of the Up Trust, to provide investors with investment returns that correspond with changes in the price of NYMEX crude oil futures contracts within the range from (i) zero to (ii) twice the Starting Level and, in the case of the Down Trust, to provide investors with investment returns that correspond inversely with the price of NYMEX crude oil futures within the range from (i) zero to (ii) twice the Starting Level. On June 27, 2008, the Starting Level was established at $100 and as a result, the maximum price range within which the Paired Shares will provide returns is $0 to $200. There can be no assurance that the Paired Trusts will achieve their investment objective. The percentage change in the price of NYMEX crude oil futures contracts from the Starting Level is referred to as the Price Level Percentage Change and is defined as, on any date, the absolute value of (x) the Ending Level of the Applicable Reference Price of Crude Oil on that date (or the last preceding Price Determination Day if the date of determination is not a Price Determination Day) minus the Starting Level of the Applicable Reference Price of Crude Oil divided by (y) the Starting Level.

The trustee deposits one-half of the aggregate funds received by it in connection with an issuance of paired shares into the Up Trust and the other half into the Down Trust, without regard to the per share underlying values at which the Up and Down MacroShares were issued, in order to preserve the one-to-one ratio of cash and treasuries on deposit (such cash and treasuries on deposit, less accrued operating expenses being referred to as the Investment Amount) in the Paired Trusts. The proportion of the Investment Amounts in the Up Trust and the Down Trust of 1:1 will be maintained throughout the entire life of the Paired Trusts by virtue of the requirement that redemptions and issuances must be done in MacroShares units composed of an equal number of Up MacroShares and Down MacroShares. Up MacroShares and Down MacroShares are issued at underlying value, and the difference between the underlying value of the Up MacroShares and Down MacroShares issued and the amount deposited into each Trust is attributable to the effects of the provisions of the Settlement Contracts and Income Distribution Agreement (both of which are described below).



5





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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

The underlying value formula described in the prospectus and the requirement that Down MacroShares can only be issued and redeemed in paired issuances and paired optional redemptions and only in the form of MacroShares units, is intended to ensure that a $1 change in the settlement price in the Applicable Reference Price of Crude Oil will result in a $0.25 ($0.0625 after giving effect to the share split described in Note J) change in the per share underlying value of each Down MacroShare. However, there can be no assurance that this objective will be achieved. The relationship between changes in the Applicable Reference Price of Crude Oil and the per share underlying value of a Down MacroShare will be as described only so long as the amount of cash and treasuries (not including income on the treasuries) on deposit in the Down Trust is equal to the aggregate par amount of all Down MacroShares that are outstanding from time to time. If the amount of cash and treasuries in the Down Trust is less than the aggregate par amount of the Down MacroShares (as was the case at December 31, 2008), because the fees and expenses of the Down Trust have exceeded its treasury income during one or more calculation periods, a specified change in the Applicable Reference Price of Crude Oil will still result in the same percentage change in per share underlying value, but not the same dollar amount, because each Down MacroShare will represent, in effect, a smaller exposure to oil. The underlying value of the Down Trusts shares represents that portion of the proceeds of the assets of the Down Trust that would be distributed in conjunction with a redemption and as a final distribution upon termination if the Paired Trusts were to settle the settlement contracts and the Down Trust were to make a final distribution on the Down MacroShares. The underlying value per share of the Down MacroShares at December 31, 2008 was $38.09 ($9.52 after giving effect to the share split described in Note J).

The assets of the Down Trust consist of cash, U.S. government securities, repurchase agreements collateralized by U.S. government securities (collectively referred to as treasuries) and over-the-counter derivative instruments entered into between the Paired Trusts. The interest income on the treasuries during a calculation period, less the expenses of the Down Trust for that period, is referred to as the Available Income Accrual for that period. The derivative instruments consist of the Income Distribution Agreement, which is described below, and the Settlement Contracts which provide that the Down Trust will be entitled to receive from, or be required to make to, the Up Trust a payment at the termination of each of these contracts in an amount that is based on the percentage change between the settlement price of NYMEX crude oil futures contracts (the Closing Price) at the time when the Settlement Contracts are terminated and the Starting Level of $100 (See The Settlement Contracts, below.) The NYMEX crude oil futures contracts that are referenced by the Paired Trusts are (i) futures contracts that mature during the next calendar month succeeding the current month for any date of determination occurring on or after the first day of the current month up to but excluding the 11th New York Business Day of that month and (ii) futures contracts that mature during the second calendar month succeeding the current calendar month for any date of determination occurring on or after such 11th New York Business Day (provided that the switch out of next months contract to the succeeding months contract may not take place later than the 17th day of each month).

For purposes of determining the underlying value at which Paired Shares are redeemed or created, each Settlement Contract is valued on each New York Business Day (any day on which stock exchanges and New York money center banks are open for business) based on the Closing Price and the resulting percentage change in the Closing Price from the Starting Level applied to the Investment Amount of the Paying Trust. The performance obligations of the Paired Trusts to each other under the Settlement Contracts are collateralized by cash, U.S. government securities and repurchase agreements backed by U.S. government securities that are held in each of the Paired Trusts. The Down Trusts obligations are not leveraged and the Down Trust realizes capital gains or losses only when a Settlement Contract is terminated in connection with a Paired Optional Redemption, an early termination or the final scheduled termination of the Paired Trusts.



6



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

The Income Distribution Agreement entered into between the Paired Trusts is the means for allocating between the Paired Trusts the daily income accrual on the U.S. government securities and other assets on deposit in the trusts, net of expenses. Under the Income Distribution Agreement, the Down Trust is obligated to pay a portion of its income to the Up Trust or entitled to receive a portion of the Up Trusts income, based on the Price Level Percentage Change for each day of the calendar quarter between distribution dates. The Down Trusts daily income for the purposes of determining underlying value recorded under the Income Distribution Agreement reflects the change in either an asset receivable by it or a liability payable by it, based upon the Price Level Percentage Change. A payment is made by one of the Paired Trusts to the other on each quarterly distribution date and the Down Trust then distributes its remaining income (if it had to make a payment under the Income Distribution Agreement) or all of its income and a portion of the income it received from the Up Trust (if it received a payment under the Income Distribution Agreement) as a quarterly distribution to its shareholders on or immediately following such quarterly distribution date. As a result, the amount of Available Income Accrual that will be retained by the Down Trust and the net amounts received or paid in connection with issuances or redemptions and relating to the portion of underlying value attributable to such retained Available Income Accrual (referred to as the Earned Income Accrual) means, for each calendar day occurring during any calculation period:

·

if on such date the Ending Level is below the Starting Level, the Down Available Income Accrual for that date plus the product of (i) the Up Available Income Accrual for that date and (ii) the Price Level Percentage Change on that date;

·

if on such date the Ending Level is above the Starting Level, the Down Available Income Accrual for that date minus the product of (i) such Down Available Income Accrual and (ii) the Price Level Percentage Change on that date; and

·

if on such date the Ending Level is equal to the Starting Level, the Down Available Income Accrual for that date;

plus

·

if the day of measurement is also an Issuance Date on which a net increase in the Down Aggregate Par Amount has occurred after giving effect to all Paired Issuances and Paired Optional Redemptions on that date, the product of the number of Down MacroShares created on such date constituting such net increase and the income component of the Per Share Underlying Value of each such Down MacroShare, representing the Down Earned Income Accrual allocable to such share during the period from the last preceding Distribution Date to such Issuance Date;

minus

·

if the day of measurement is also a Redemption Date on which a net decrease in the Down Aggregate Par Amount has occurred after giving effect to all Paired Optional Redemptions and Paired Issuances on that day, the product of the number of Down MacroShares redeemed on such day constituting such net decrease and the income component of the Per Share Underlying Value of each such Down MacroShare, representing the Down Earned Income Accrual allocable to such share during the period from the last preceding Distribution Date to such Redemption Date.

The Down Earned Income Accrual for each Calculation Period will be equal to the sum of the Down Earned Income Accruals for each day of that Calculation Period.



7



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

If the Down Trust has no available income on any distribution date, then it will not make any payment under the Income Distribution Agreement that it may otherwise have been required to make to the Up Trust. Similarly, if on any distribution date the proceeds of the treasuries in the Up Trust minus its fee deduction amount are equal to or less than the Up Trust aggregate par amount, then the Up Trust will not have any available income and it will not make any payment under the Income Distribution Agreement that it may otherwise have been required to make to the Down Trust on that distribution date. If either of the paired trusts fails to make a payment under the Income Distribution Agreement on any distribution date because it does not have any available income, that trust will not be required to make up that payment on any subsequent distribution date, even if it has funds available to do so.

If on any distribution date the Down Trust does not have any available income and does not receive any available income from the Up Trust, it will not make any quarterly distribution to its shareholders on that distribution date.

As of December 31, 2008, market interest rates on securities permitted to be owned by the Paired Trusts were below the fee deduction amount charged by the Down Trust.  Accordingly, no distribution was made for the quarter ended December 31, 2008 and the ability of the Down Trust to make future distributions to investors will be reduced, and possibly eliminated, until such time as market interest rates exceed the fee deduction amount, and the deficiency in the amount that is invested must be made up out of income received on subsequent distribution dates until the amount invested does equal the Down Aggregate Par Amount.  At December 31, 2008, the deficiency in the amount invested measured against the Down Aggregate Par Amount approximated $340,000.

The Settlement Contracts

Upon each issuance of Down MacroShares as part of a MACRO Unit in a Paired Subsequent Issuance, the Down Trust enters into a new Settlement Contract with the Up Trust. For each New York Business Day, the Paired Optional Redemptions and Paired Subsequent Issuances ordered on that day are netted for purposes of determining how many Settlement Contracts need to be entered into or terminated on that day; however, one Settlement Contract must always be outstanding for one MACRO Unit of outstanding Paired Shares. Under the Settlement Contracts, the Down Trust is either (1) required to deliver all or a portion of its assets (held in the form of cash, government securities and repos) to the Up Trust or (2) entitled to receive all or a portion of the assets (held in the form of the same types of assets) of the Up Trust. The settlement payments made or received pursuant to the Settlement Contracts are based on the percentage difference between the Closing Price and its Starting Level on the day on which a redemption order for Paired Shares is delivered to the Administrative Agent, as further described below. The final distribution on the Down MacroShares depends upon the settlement payment that the Down Trust will either be required to make or be entitled to receive under the Settlement Contracts when such contracts are settled in connection with Paired Optional Redemptions, early terminations or the final scheduled termination of the Down Trust.

The settlement obligations of the Paired Trusts under the Settlement Contracts are fully supported by the cash, government securities and repurchase agreements held by each trust.

As a result of the Settlement Contracts and Income Distribution Agreement, the Underlying Value of the Down Trust will equal, on any Price Determination Day occurring during any Calculation Period:

·

if the Ending Level of the Applicable Reference Price of Crude Oil on that Price Determination Day is below the Starting Level:



the sum of the Down Earned Income Accruals for each day that has elapsed during such Calculation Period, up to and including the relevant current Price Determination Day

plus



the Down Investment Amount on such day



8



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

plus



the Up Investment Amount on such day multiplied by the Price Level Percentage Change for such day,

OR

·

if the Ending Level of the Applicable Reference Price of Crude Oil on that Price Determination Day is above the Starting Level:



the sum of the Down Earned Income Accruals for each day that has elapsed during such Calculation Period, up to and including the relevant current Price Determination Day

plus



the Down Investment Amount on such day

minus



the Down Investment Amount on such day multiplied by the Price Level Percentage Change for such day,

OR

·

if the Ending Level of the Applicable Reference Price of Crude Oil on that Price Determination Day is equal to the Starting Level, the sum of the Down Earned Income Accruals for each day that has elapsed during such Calculation Period, up to and including the relevant Price Determination Day, plus the Down Investment Amount on that day.

The Underlying Value of the Down Trust for any Price Determination Day that is followed by one or more days that are not Price Determination Days will include the Down Earned Income Accruals for each of these days, calculated on the basis of the Applicable Reference Price of Crude Oil on the current Price Determination Day. The Underlying Value of the Down Trust on any day that is not a Price Determination Day will be equal to its Underlying Value on the last preceding Price Determination Day.

Distributions

Each shareholder who is a registered holder of Down MacroShares on the Record Date will be entitled to receive the Quarterly Distribution, as calculated below. The Quarterly Distribution will be paid out to shareholders on the Distribution Payment Date that follows each Distribution Date.

The Underlying Value of the Down Trust on each Distribution Date will be calculated before Available Income, if any, is deducted from that Underlying Value and set aside for payment as a Quarterly Distribution on the related Distribution Payment Date. As a result, the Underlying Value of the Down Trust on the day following each Distribution Date will reflect a relative decrease from the Underlying Value on that Distribution Date that will be unrelated to any movement in the level of the Applicable Reference Price of Crude Oil.

On each Distribution Date, other than on the Final Scheduled Termination Date or an Early Termination Date and other than with respect to any shares for which a redemption order was placed and settled prior to the related Record Date, the Down Trust will declare a Quarterly Distribution on each outstanding Down MacroShare equal to the sum of Down Earned Income Accruals for each day of the preceding Calculation Period divided by the aggregate number of outstanding Down MacroShares on that Distribution Date.

On the Distribution Payment Date that follows each Distribution Date, the Down Trust will distribute such amount on each outstanding Down MacroShare.



9



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

Distributions of the Down Earned Income Accruals on the Final Scheduled Termination Date, an Early Termination Date or any Redemption Date will be made as part of the Final Distribution that is made on those dates.

If available, an amount equal to the Down Aggregate Par Amount will always be reinvested by the Trustee, at the direction of the Administrative Agent, in new treasuries on each Distribution Date unless that Distribution Date is the Final Scheduled Termination Date or an Early Termination Date. If a redemption order is delivered on a Distribution Date or on the day preceding a Distribution Date, the Down Aggregate Par Amount will first be reduced by the aggregate par amount of any Down MacroShares being redeemed on that date. If, after expenses, the funds remaining on deposit in the Down Trust on any Distribution Date are equal to or less than the Down Aggregate Par Amount, then all of these remaining funds must be reinvested in treasuries and the trust will have no Available Income on that date. If less than the Down Aggregate Par Amount is invested in treasuries on any Distribution Date, the deficiency in the amount that is invested must be made up out of income received on subsequent Distribution Dates until the amount invested does equal the Down Aggregate Par Amount. At December 31, 2008 the amount invested (less operating expenses payable) and the Down Aggregate Par Amount approximated $10,910,000 and $11,250,000, respectively, resulting in a deficiency of approximately $340,000 that must be made up out of income received on subsequent Distribution Dates.

Issuance and Redemption

Paired Shares are only created and redeemed, and Down MacroShares are only created and exchanged, through entities who are banks, broker-dealers or other participant members of The Depository Trust Company (DTC) who have executed a contract with the Trustee and the Administrative Agent (Authorized Participants).

Authorized Participants may direct the issuance and redemption of Down MacroShares and Up MacroShares in MacroShares Units on a continuous basis. Paired Issuances are all issuances of Paired Shares in MacroShares Units that occur at any time after the formation of the Paired Trusts, and Paired Optional Redemptions are all optional, shareholder-directed redemptions of Paired Shares in MacroShares Units. Paired Shares are always issued in Paired Issuances and always redeemed in Paired Optional Redemptions at a specified redemption price equal to the combined underlying values of the Paired Trusts attributable to the shares being issued or redeemed. The final distribution made on the Down MacroShares being redeemed in a Paired Optional Redemption will equal the ratable portion of the net assets of the Down Trust that are remaining in the trust after it has made or received a settlement payment under each Settlement Contract that was terminated in connection with such redemption. The market price of the Down MacroShares or Up MacroShares at the time of the redemption of any Paired Shares will have no effect on or relation to the price at which the applicable trust is required to redeem those shares.

Orders for Paired Issuances and Paired Optional Redemptions will be accepted from Authorized Participants on each New York Business Day. Paired Issuances and Paired Optional Redemptions can be settled on order date plus one business day, except that, any redemption order that is delivered on a distribution date or on the business day following a distribution date will be settled on the third business day following the redemption order date to ensure that any Authorized Participant who places a redemption order on these two days will still be considered a holder of record on the record date and, therefore, eligible to receive its quarterly distribution, if any, for the preceding calculation period.



10



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

B.

Summary of Significant Accounting Policies

The following is a summary of the significant accounting policies that are consistently followed by the Down Trust in the preparation of its financial statements.

Basis of Accounting

The policies are in conformity with accounting principles generally accepted in the United States (GAAP). The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities on the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods presented in the accompanying financial statements (the Reporting Period). Actual results could differ from those estimates.

General

Under GAAP, U.S. government securities and repurchase agreements are accounted for on a trade date basis. Interest income, adjusted for the amortization of premium and accretion of discounts is earned from settlement date and is recorded on an accrual basis. Expenses are recorded on an accrual basis as incurred.

Cash and Cash Equivalents

The Down Trust considers all highly liquid investments with original maturities of less than 90 days to be cash equivalents.

The Down Trust invests in debt securities issued by the U.S. government and repurchase agreements (or repos) collateralized by U.S. government securities, which have, in each case, remaining maturities or terms of less than ninety (90) days. The Down Trust may enter into repurchase agreements with banks and broker-dealers whereby the Down Trust acquires a U.S. debt security for cash and obtains a simultaneous commitment from the seller to repurchase the security at an agreed upon price and date. The Down Trust, through its custodian, takes possession of securities that are used as collateral. In connection with transactions in repos, if the seller defaults or enters into insolvency proceedings and the value of the collateral declines, recovery of cash by the Down Trust may be delayed or limited. The U.S. government securities and repos are valued at amortized cost, which approximates market value.

The Settlement Contracts

For the purpose of determining the underlying value at which Paired Shares are redeemed or created, each daily recording of the difference between the Closing Price and the Starting Level is referred to as the daily calculation of the amount due to or from the Down Trust under the Settlement Contract. If the Closing Price is less than its Starting Level an asset receivable is recorded as being due from the Up Trust under the Settlement Contracts. If the Closing Price exceeds its Starting Level, a liability payable to the Up Trust is recorded under the Settlement Contracts. If the Closing Price equals its Starting Level, no accounting entry is recorded.

For the purpose of financial reporting, the settlement contracts constitute derivative contracts. Accordingly, the settlement contracts are recorded in the financial statements at fair value, as determined by the Administrative Agent. As there is no market for the settlement contracts, and no such market is expected to develop, the Administrative Agent determines the fair value of the settlement contracts by reference to various inputs, including the contractual amount due to or from the other trust, applicable market indices, and the prices of transactions in Up and Down MacroShares on the principal market for such shares. The fair value of the settlement contracts as determined in good faith by the Administrative Agent could differ from the value that would have been determined had a market for the settlement contracts existed, and the differences could be material. The fair value of the settlement contracts held by the Down Trust as of December 31, 2008 and on various creation or redemption dates during the Reporting Periods for financial reporting purposes was different from the value used to determine underlying value, as defined previously.



11



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

Income Distribution Agreement

Under the Income Distribution Agreement with the Up Trust, the Down Trust, on each quarterly distribution date, is either (1) required to pay all or a portion of its income from its U.S. government securities and repos, after deduction of a fixed number of basis points (a basis point being 1/100 of one percent) and an accrual for other expenses, for the payment of fees and expenses, to the Up Trust or (2) entitled to receive all or a portion of the Up Trusts income, after the Up Trust has deducted a fixed number of basis points for the payment of its asset-based expenses, and an accrual for other expenses.

For the purpose of determining the underlying value at which Paired Shares are redeemed or created, if the Closing Price on any New York Business Day exceeds its Starting Level, the Up Trust records a payment obligation to be made to it by the Down Trust under the Income Distribution Agreement as an asset receivable for that day. If the Closing Price is less than its Starting Level on any New York Business Day, the Up Trust records a liability payable to the Down Trust under the Income Distribution Agreement. If the Closing Price equals its Starting Level, no accounting entry is recorded. For any day that is not a New York Business Day, the Closing Price from the last preceding New York Business Day is used to calculate asset or liability under the Income Distribution Agreement for that day. The assets receivable and liabilities payable by the Down Trust for each day of the Calculation Period are netted in order to determine whether the Down Trust will make a payment to, or to be entitled to receive payment from, the Up Trust on the quarterly distribution date, prior to distributing its income to its shareholders.

For the purpose of financial reporting, the Income Distribution Agreement constitutes a derivative contract. Accordingly, the Down Trust records the Income Distribution Agreement in the financial statements at fair value, as determined by the Administrative Agent. As there is no market for the Income Distribution Agreement, and no such market is expected to develop, the Administrative Agent determines the fair value of the income distribution contract by reference to various inputs, including the contractual amount due to or from the other trust as well as the factors considered in the valuation of the settlement contracts as described above. The fair value of the Income Distribution Agreement as determined in good faith by the Administrative Agent could differ from the value that would have been determined had a market for the Income Distribution Agreement existed, and the differences could be material. The fair value of the Income Distribution Agreement held by the Down Trust as of December 31, 2008 and on various creation or redemption dates during the Reporting Periods for financial reporting purposes was different from the value used to determine underlying value, as defined previously.

Fair Value

The Down Trust adopted Financial Accounting Standards Board Statement of Financial Accounting Standards No. 157, Fair Value Measurements (SFAS 157), effective January 1, 2008. In accordance with SFAS 157, fair value is defined as the price that the Down Trust would receive upon selling the settlement contracts and income distribution agreement in a timely transaction to an independent buyer in the principal or most advantageous market of the investment. SFAS 157 established a three-tier hierarchy to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. The three-tier hierarchy of inputs is summarized in the three broad Levels listed below:

·

Level 1  quoted prices in active markets for identical investments

·

Level 2  other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

·

Level 3  significant unobservable inputs (including the Down Trusts own assumptions in determining the fair value of investments)



12



---





MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

The following is a summary of the inputs used as of December 31, 2008 in valuing the Down Trusts settlement contracts and the income distribution agreement carried at value:

|                                              |  |   |           | 
|--------------------------------------------- |  | - | --------- | 
|Level 1  Quoted Prices                       |  | $ |         | 
|Level 2  Other Significant Observable Inputs |  |   | 4,873,500 | 
|Level 3  Significant Unobservable Inputs     |  |   |         | 
|Total                                         |  | $ | 4,873,500 | 

Summary of Level 3 Inputs on Fair Valuation of Settlement Contracts and the Income Distribution Agreement:

|                                                                            |  |                                                  |    |  |                                                |   |            |  
|--------------------------------------------------------------------------- |  | ------------------------------------------------ | -- |  | ---------------------------------------------- | - | ---------- | -
|                                                                            |  | Period from
October 1,
2008 to
December 31,
2008 |    |  | Period from
June 27,
2008 to
December 31,
2008 |  
|Balance at beginning of period                                              |  |                                                  |  |  |                                                |   |          |  
|Creation Activity                                                           |  |                                                  |  |  |                                                | $ | (2,500,000 | )
|Redemption Activity                                                         |  |                                                  |  |  |                                                |   |          |  
|Realized and Unrealized Gains or Losses                                     |  |                                                  |  |  |                                                |   |          |  
|Transfers in or out of Level 3 in response to changes in significant inputs |  |                                                  |  |  |                                                | $ | 2,500,000  |  
|Balance at end of period                                                    |  |                                                  |  |  |                                                |   |          |  

The commencement of trading of shares of the Down Trust on July 1, 2008 provided significant observable inputs resulting from the transfer out of Level 3.

Federal Income Taxes

The Down Trust is treated as a partnership for federal income tax purposes and, therefore, no provision forfederal income taxes is required.

C.

Operating Expenses and Related Party Expenses

Operating expenses are deducted daily from the income earned by the Down Trust in an amount equal to the product of the Down Trusts assets, including Treasuries and cash (but excluding the value of the settlement contracts and the Income Distribution Agreement), held by the Down Trust on each day (the Down Trust Asset Amount) and (i) a rate of 95 basis points (one basis point equal 0.01%) per annum and an estimated fixed annual amount of approximately $600,000, the individual expense components of which are divided by the number of days in the current fiscal or tax year, as applicable.

C1.

Related Party Expenses

Pursuant to the Down Trust Agreement, the Down Trust, commencing on June 30, 2008, pays MacroMarkets LLC a fee that accrues daily at annualized rate of 0.25% of the Down Trust Asset Amount for acting as the Administrative Agent. The fee for the three months ended December 31, 2008 was $6,930 and for the period from June 27, 2008 to December 31, 2008 was $18,422.



13



---





MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

The Down Trust pays (a) MacroMarkets LLC, in addition, (i) a licensing fee for the use of its intellectual property related to the patented MacroShares structure, which accrues daily at an annualized rate of 0.05% on the Down Trust Asset Amount, (ii) a structuring fee for structuring the product, which accrues daily at an annualized rate of 0.10% on the Down Trust Asset Amount, (iii) a sub-licensing fee for the right to reference the NYMEX light sweet crude oil futures contracts which accrues daily at an annualized rate of 0.065% on the Down Trust Asset Amount and pays (b) Macro Financial, LLC, an affiliate of MacroMarkets LLC, a marketing fee for acting as Marketing Agent for the trust, which accrues daily at an annualized rate of 0.335% of the Down Trust Asset Amount. The MacroMarkets LLC and Macro Financial, LLC fees for acting in these capacities for the three months ended December 31, 2008 were $13,859 and for the period from June 27, 2008 to December 31, 2008 were $36,844.

C2.

Trustee Fees

Pursuant to the Declaration of the Down Trust, the Trustee receives a fee with respect to the services for the Down Trust in an amount equal to the product of a per annum rate of up to 0.12% of the Down Trust Asset Amount on such day, with a minimum annual fee of $150,000. Trustee fees, including a technology fee reimbursement for the three months ended December 31, 2008 were $53,751 and for the period from June 27, 2008 to December 31, 2008 were $108,086.  In addition, the Trustee receives a fee of $2,000 directly from the Authorized Participants in connection with each Paired Issuance or Paired Optional Redemption.

State Street Bank and Trust Company, N.A., a national bank chartered by the Office of the Comptroller of the Currency, is the Custodian of the trust assets on behalf of the Down Trust.

D.

Distributions

The Trustee of the Down Trust will normally make quarterly distributions and will make a final distribution to each person who was a Registered Owner, which is the depository or nominee thereof in which name the Down MacroShares are registered, on the record date that preceded such distribution date.  For the period ended June 30, 2008 and for the quarters ended September 30, 2008 and December 31, 2008, no distributions were made. The ability of the Down Trust to make future distributions to investors will be reduced, and possibly eliminated, until such time as market interest rates exceed the fee deduction amount, and the deficiency in the amount that is invested is made up out of income received on subsequent distribution dates.  At December 31, 2008, the deficiency in the amount invested measured against the Down Aggregate Par Amount approximated $340,000.  When made by the Down Trust, the quarterly and final distributions will occur after all expenses of the Down Trust have been paid.  The amount of the quarterly distributions may consist of interest and other income received on the debt securities issued by the U.S. government and repos, income received by the Down Trust under the Income Distribution Agreement, and all paid-in interest associated with any paired issuances.

E.

Share Transactions

Issuances and redemptions of Down MacroShares are reflected in these financial statements at the value of the equity attributable to such shares at time of issuance or redemption, based on GAAP, which may differ from underlying value.

For the quarter ended December 31, 2008 there were no issuances or redemptions of Down MacroShares.



14



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

For the period from June 27, 2008 to December 31, 2008, 950,000 of the Down MacroShares were created at the value of the equity attributable to such units of $19,604,600, with an underlying value of approximately $15,681,000. Of these amounts, the Down Trust issued 400,000 shares to the initial Authorized Participant at the value of the equity attributable to such shares of $7,500,000 or $18.75 per share. The Down Trust receives, for each shares issued, cash equal to one half of the combined Underlying Value of the Up Trust and the Down Trust. The increase/decrease in the contractual value of the settlement contracts and income distribution agreement resulting from creations and redemptions results in the net increase/decrease in net assets per share on creations and redemptions being equal to underlying value per share on the date of issuance or redemption. Similarly, the increase/decrease in the fair value of the settlement contracts from creations and redemptions results in the net increase/decrease in net assets from creations and redemptions for financial reporting purposes being equal to equity attributable to such shares on the date of issuance or redemption. Accordingly, such increase/decrease in fair value is included as part of the contributions/redemptions in the Statement of Changes in Shareholder Equity. For the period from June 27, 2008 to December 31, 2008, 500,000 Down MacroShares were redeemed at the value of the equity attributable to such shares of $11,916,000 with an underlying value of approximately $11,529,000. In addition, shares representing initial Founders Equity discussed above, were also redeemed in the period from June 27, 2008 to December 31, 2008.

The Down MacroShares are classified as redeemable for financial statement purposes, because they are subject to continuous redemptions as described in the prospectus for such shares.  Individual investors cannot purchase or redeem shares in direct transactions with the Down Trust.  The Down Trust only deals with Authorized Participants, who may redeem Down MacroShares at any time (but only together with Up MacroShares in the prescribed minimum aggregations that constitute MacroShares Units), provided that optional redemptions of shares may be suspended in certain circumstance which are described in the Trust Agreement.

F.

Indemnifications

Under the Down Trusts Trust Agreement, the Authorized Participant Agreements, and certain licensing agreements, the Depositor, the Trustee, NYMEX, the Authorized Participants and MacroMarkets LLC are indemnified by the Down Trust against any liability or expense that any of them may incur in connection with the service and licensing agreements into which they entered with the Down Trust that is not the result of gross negligence, bad faith, willful misconduct or reckless disregard on their part. The Down Trusts maximum exposure under these indemnification arrangements (as set forth in their respective trust agreements, the Authorized Participant Agreements and certain licensing agreements) is unknown and dependent upon future claims that may be made against the Down Trust based on events that have not yet occurred. However, the Down Trust expects the risk of loss to be remote.

G.

Recent Accounting Pronouncements

In March 2008, Statement of Financial Accounting Standards No. 161, Disclosures about Derivative Instruments and Hedging Activities (SFAS 161), was issued and is effective for fiscal years beginning after November 15, 2008. SFAS 161 requires enhanced disclosures to provide information about the reasons the Paired Trusts enter into derivative instruments with one another, the accounting treatment and the affect such derivatives have on financial performance. Management is currently evaluating the impact the adoption of SFAS 161 will have on the Down Trusts financial statements and related disclosures.

In October 2008, the FASB issued FSP No. FAS 157-3 (FSP FAS 157-3), Determining the Fair Value of a Financial Asset When the Market for That Asset is Not Active. FSP FAS 157-3 clarifies the application of SFAS 157, Fair Value Measurements, in a market that is not active and provides an example to illustrate key considerations in determining the fair value of a financial asset when the market for that financial asset is not active. This FSP became effective on October 10, 2008 and also applies to prior periods for which financial statements have not been issued. The adoption of this pronouncement did not impact the Down Trusts fair value methodologies on its financial assets.



15



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

H.

Concentration Risk

The Down Trusts performance at underlying value is determined by the daily Closing Price of NYMEX light sweet crude oil futures contracts. Therefore, the primary risk of loss to the Down Trust comes from fluctuations in the Closing Price of crude oil futures contracts. The maximum price level of crude oil futures contracts for which the Up Trust can deliver positive investment returns at underlying value corresponding to the price of such crude oil futures contracts is equal to twice the Starting Level of $100, or $200. (Conversely, the minimum price level of crude oil futures contracts for which the Down Trust can deliver positive investment returns at underlying value corresponding inversely to the price of such crude oil futures contracts is zero.) Also, the Down Trust is exposed to possible indemnification obligations, as described above. An additional risk comes from interest rate fluctuations, which affects the total amount of income earned by the Paired Trusts. In addition, State Street Bank and Trust Company, N.A. holds 100% of the cash and cash equivalents on deposit. There are risks in terms of exposure to State Street Bank and Trust Company, N.A. in that the Down Trust may potentially lose all or portion of the cash that is held at State Street Bank and Trust Company, N.A.

I.

Termination of the Trust

The Down Trust is scheduled to be terminated on December 27, 2013. On such date, the holders of any Down MacroShares which remain outstanding will receive the net assets of the Down Trust after the settlement and termination of all outstanding Settlement Contracts in the same manner as such contracts would be settled and terminated in connection with any Paired Optional Redemption. The Income Distribution Agreement will also be terminated on this date, but no settlement obligations will be due thereunder.

Additional termination events of the Down Trust consist of (i) any event in which either of the Paired Trusts becomes insolvent or bankrupt; (ii) either of the Paired Trusts becomes required to register as an investment company under the Investment Company Act of 1940, as amended; (iii) the Paired Trusts are prohibited from using, or NYMEX or the applicable substitute oil price provider does not establish, a settlement price for light sweet crude oil futures contracts or the applicable substitute reference oil price for five consecutive New York Business Days; (iv) either of the Paired Trusts becomes a commodities pool that is subject to regulation under the Commodity Exchange Act, as amended, (v) DTC becomes unwilling or unable to act as depository and no suitable replacement is willing or able to assume the duties of a depository for the Paired Trusts, (vi) the Depositor elects to terminate the Paired Trusts and 66 and 2/3% of the holders of the Up Trust and the Down Trust, each voting as a separate class, consent to such termination, (vii) the administrative agent resigns or is unable to perform its duties under one or both trust agreements of the paired trusts, or becomes bankrupt or insolvent, and no suitable replacement is willing and able to assume the duties of the administrative agent under the Trust agreements, (viii) on any business day, the Applicable Reference Price of Crude Oil rises to or above $185.00, or falls to or below $15.00 and, in either case, the Applicable Reference Price of Crude Oil remains at that level for three consecutive price determination days, (ix) either of the Paired Trusts becomes under-collateralized, as measured on any Distribution Date prior to the making of any payments or distributions on that Distribution Date and without taking into account the rights and obligations of the Paired Trusts under the Income Distribution Agreement and the Settlement Contracts, such that the amount of cash on deposit in the affected trust is equal to 90% or less of the cash on deposit in the other trust; (x) the amount of cash and treasuries on deposit in the Up Trust or the Down Trust is reduced to less than $10 million; and (xi) the amount of cash and treasuries on deposit in the Up Trust or the Down Trust is less than $50 million U.S. dollars and the Depositor elects, in its sole discretion, to terminate the trusts. Therefore, because the Paired Trusts currently do not each hold cash and U.S. government securities in an amount equal to at least $50 million U.S. dollars, the Depositor has the right, for so long as such $50 million U.S. dollar threshold has not been received, and maintained, to terminate the Paired Trusts. However, the Depositor currently has no intention of terminating the Paired Trust.



16



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MacroShares $100 Oil Down Trust
NOTES TO THE UNAUDITED FINANCIAL STATEMENTS (CONTINUED)
as of December 31, 2008

In the case of each of these termination events, including the event described in clause (viii) above, but excluding the event described in clause (ix) above, the Settlement Contracts would settle on the next Distribution Date on the basis of the Closing Price on the last Price Determination Date preceding that Distribution Date, which may be different from the Closing Price at the time when the termination event occurred. In the case of the termination trigger described in clause (ix) above, the Settlement Contracts will settle on the same Distribution Date on which such termination trigger occurred.

J.

Subsequent Event

On January 9, 2009, the Depositor announced a four-for-one split of the MacroShares $100 Oil Down Shares. Each shareholder of record at the close of business on January 23, 2009 received three additional shares for every one share held on the record date. The payable date for the additional shares was January 29, 2009. Trading began on a split adjusted basis on January 30, 2009. The total number of authorized shares remains unlimited and the associated initial par value was reduced from $25.00 to $6.25 by this action. The share split requires retroactive restatement of per share data for all periods presented in financial statements filed subsequent to January 29, 2009. All references to the number of shares outstanding, contributed and redeemed in the Financial Statements and Notes to the Financial Statements have not been retroactively adjusted to give effect to the share split. The net income per share and weighted average shares outstanding disclosed in the Statement of Operations have been restated to give effect to the share split.





17



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Item 2

Management's Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis should be read in conjunction with the financial statements and accompanying notes filed as part of this report.

INTRODUCTION

Overview of the Trusts Structure

The assets of the Down Trust consist of an income distribution agreement and settlement contracts entered into with the Up Trust. The Down Trust also holds U.S. Treasuries, on business day repurchase agreements on U.S. Treasuries, and cash to secure its obligations under the income distribution agreement and the settlement contracts. The Down Trust makes quarterly distributions of its net income when the income of the Trust exceeds the Trusts expenses, and a final distribution of all assets it holds on deposit on the final scheduled termination date, an early termination date, or a redemption date. Each quarterly and final distribution will take into consideration the settlement price of the benchmark NYMEX index value (ticker symbol RPCRX) based upon the benchmark NYMEX light sweet crude oil futures contracts of a designated maturity, as established and reported by NYMEX on each price determination day. The NYMEX index value is calculated by dividing the current designated maturity futures contract by four (4). The starting level for the Applicable Reference Price of Crude Oil is $100.00 and the original par value per share was $25.00 ($100.00 per barrel divided by $25.00 equals the Applicable Reference Price divisor of 4. The obligations under the settlement contracts on the final scheduled termination date, an early termination date or a redemption date are determined based on the Applicable Reference Price of Crude Oil on the last preceding price determination day and the percentage change of such price from the starting level and the Investment Amount. The Up Trust and the Down Trust have announced a four for one share split payable January 29, 2009, to shareholders of record on January 23, 2009. Trading began on a split adjusted basis on January 30, 2009.

The Down Trust issues and offers Down MacroShares on a continuous basis at their underlying value. Each new issuance is made at the request of authorized participants in the form of MacroShares units with each unit consisting of 50,000 Down MacroShares and 50,000 Up MacroShares contemporaneously issued by each trust.

The Down Trust intends to distribute quarterly to its shareholders the income from government securities and overnight repurchase agreements (Treasuries) it holds on deposit during such quarter less the fee deduction amount, plus or minus, in accordance with the income distribution agreement, the amount received from or paid to, as applicable, the Up Trust. Final distributions are made to shareholders on the earlier of the final scheduled termination date or an early termination date.

Effective July 1, 2008, the Down MacroShares have traded on the AMEX under the symbol DOY. Effective November 14, 2008, the listing of Down MacroShares was transferred from the AMEX to NYSE Arca, following the acquisition of the AMEX by NYSE Euronext.

No quarterly distributions to shareholders have been made by the Down Trust for the period ended June 30, 2008 or the quarters ended September 30, 2008 and December 31, 2008 due to the fee deduction amount being in excess of the income earned by the Down Trust. There has been and continues to be a significant reduction in yields available on Treasuries as investors have fled to the perceived safety of U.S. Treasury securities during the current economic crisis.

Daily Reporting

The New York Stock Exchange Euronext or the "NYSE Arca" acts as a calculation agent for the Down Trust, and the Up Trust for calculating the indicative intraday value of the benchmark oil index on an intraday and end of day basis. Throughout each price determination day (as defined in the prospectus), from the opening of trading on NYMEX to the close of trading of the Paired Shares on the NYSE Arca, the NYSE Arca calculates and posts the benchmark index every fifteen seconds to the consolidated tape immediately following each transmission from the NYMEX of the current market price of the light sweet crude oil futures contract of the designated maturity, and an indicative per share underlying value of one Down MacroShare. At the end of each price determination day, the NYSE Arca also calculates the premium or discount of the mid-point of the bid/offer prices for the Down MacroShares on the NYSE Arca to the per share underlying value of those shares for such price determination day that is calculated and provided to the NYSE Arca by the trustee.



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The following table sets forth, for the periods indicated, the high and low market price per share for the Down MacroShares.

|                                          |  |                 |  |                
|----------------------------------------- |  | --------------- |  | ---------------
|                                          |  | High            |  | Low            
|Third Quarter (beginning October 1, 2008) |  | $35.29 ($8.82*) |  | $25.05 ($6.26*)
|Second Quarter (beginning July 1, 2008)   |  | $27.00 ($6.75*) |  | $14.10 ($3.52*)
|First Quarter (beginning April 14, 2008)  |  | N/A             |  | N/A            



*After giving effect to the share split described in Note J to the Financial Statements.

Per-Share Underlying Value of MacroShares Relative to the Applicable Reference Price of Crude Oil and the Market Price

Tracking UOY and DOY Benchmark NYMEX Oil Futures Contract.

The Paired Trusts seek to passively hold a portfolio of Treasuries and overnight repurchase agreements (Treasuries) and derivative agreements such that changes in the average daily underlying value, on a dollar basis, closely track changes in the average daily price of the Benchmark NYMEX Designated Oil Futures Contract (Benchmark). Due to the paired security structure, Up MacroShares (UOY) seek to deliver the positive performance of the Benchmark, and Down MacroShares (DOY) seek to deliver the inverse performance of the Benchmark against the original benchmark issuance price of $100.00 per barrel. There is no active management of futures contracts or any other derivative contract in any component of the returns.

The Treasury portfolio must mature to cash prior to the quarterly distribution date. The daily change in the underlying value is equal to one quarter of the daily price change of the Benchmark plus accrued net income from the Treasuries. To demonstrate, if the one day price change in the Benchmark is equal to an increase of one dollar, UOYs underlying value is expected to increase by twenty five cents plus the interest earned on the Treasuries less expenses. A portion of the net income on the Treasuries is also allocated to UOY from the DOY trust when the designated Benchmark price is above $100.00 per barrel. Likewise, the underlying value of DOY, as defined within the prospectus, is expected to reflect a decline in value, equal to twenty five cents and the portion of the net income earned on the Treasuries allocable to UOY.

For benchmark oil prices below $100.00 per barrel, the underlying value of four shares of UOY would normally be expected to decline $1.00 in value for each $1.00 decline in the benchmark future oil price. The relationship between changes in the Applicable Reference Price of Crude Oil and the per share underlying value of an Up MacroShare will be as described only so long as the amount of cash and treasuries (not including income on the treasuries) on deposit in the Up Trust is equal to the aggregate par amount of all Up MacroShares that are outstanding from time to time. If the amount of cash and treasuries in the Up Trust is less than the aggregate par amount of the Up MacroShares (as was the case at December 31, 2008), because the fees and expenses of the Up Trust have exceeded its treasury income during one or more calculation periods, a specified change in the Applicable Reference Price of Crude Oil will still result in the same percentage change in per share underlying value, but not the same dollar amount, because each Up MacroShare will represent, in effect, a smaller investment in oil. At December 31, 2008, four (sixteen after giving effect to the share split described in Note J) Up MacroShares represented approximately 97% of one barrel of oil. An example of this process (disregarding the daily accrual and allocation of income from the Treasuries, the share split described in Note J to the Financial Statements and the current deficiency in the amount invested compared to the aggregate par amount discussed above) is as follows:

Day 1 of the trusts:

Assumed Starting Level of the Benchmark futures price: $100.00 per barrel

UOY = $100.00/4 or $25.00 per share

DOY = $100.00/4 or $25.00 per share

Initial par value of one set of paired shares = $25.00 + $25.00 or $50.00 per set of paired shares

Day 2 of the trusts:

Actual level of the Benchmark futures price: $130.00 per barrel

UOY= $130.00/4 or $32.50 per share



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DOY= $ 70.00/4 or $17.50 per share

Day 2 par value of one set of paired shares = $32.50+ $17.50 or $50.00 per set of paired shares

Day 3 of the trusts:

Actual level of the Benchmark futures price: $115.00 per barrel

UOY= $115.00/4 or $28.75 per share

DOY= $ 85.00/4 or $21.25 per share

Day 3 par value of one set of paired shares = $28.75 + $21.25 or $50.00 per set of paired shares

Macro Financial, LLC, the marketing agent, dedicates resources to educating investors about the new product structure of the paired Up MacroShares and Down MacroShares (MacroShares). The new structure is slightly different from the previous oil MacroShares (UCR and DCR) in that MacroMarkets no longer supports a cap on expenses to investors and as such current underlying value calculations reflect the declining principal while the yield on Treasuries do not exceed Trust expenses.  The current small asset base in UOY and DOY has resulted in investors bearing a significant expense ratio compared to UCR and DCR which terminated in July 2008. For the quarters ended September 30, 2008 and December 31, 2008, the effective annualized expense ratios to average daily underlying values were 6.94% and 5.31%, respectively. Actual periodic expense ratios borne by investors are significantly influence by the size of the Trusts underlying value.

Critics of MacroShares need to read and understand the MacroShares prospectus or discuss the product differences with Macro Financial, LLC, personnel.  The value of the patented MacroShares product structure has recently been noted in internet blogs that have discussed the MacroShares fee structure compared to unaffiliated exchange traded note structures in the marketplace that have lost significant principal value as a result of investor exposure to counterparty risk of the issuer. The patented MacroShares structure provides a valuable barrier to counterparty risk and exposure to third party entities.

The premium and discount pricing of UOY and DOY MacroShares reflect the contango and backwardation in the NYMEX light sweet crude oil future contracts (oil). Any futures market in contango represents the expectation of higher prices for the commodity into the future just as a premium reflects the willingness of investors to buy at a higher price today for performance they expect to receive at a future date. A commodities futures market in backwardation represents the expectation of lower prices in the future. Thus a premium in DOY may reflect the expected lower future value of oil while a discount in DOY may reflect the expected higher future value of oil.

The paired nature of the MacroShares creation and redemption process dictates that if the Up MacroShares are trading at a premium the Down MacroShares must trade at a discount (but not necessarily in proportion to the premium) in order to preserve the combined underlying value of the paired shares and the creation/redemption relationship to each other. Likewise, if the Up MacroShares are trading at a discount, the Down MacroShares must trade at a premium (but not necessarily in proportion to the discount) in order to preserve the combined underlying value and the creation/redemption relationship to each other.

Potential investors in MacroShares should understand that MacroShares are a relatively new class of products and that the performance attributes of the benchmark assets market will be reflected in the performance of the passively managed MacroShares.

For the period from July 1, 2008 to September 30, 2008, and for the period from October 1, 2008 to December 31, 2008, DOY was not able to pay any income to investors due to the rapid decline in the second half of 2008 in T-bill and overnight U. S. government repo yields. Yields fell significantly from approximately 2.00% at midyear to basis point yields approaching zero as investors sought a safe haven for assets as a result of the recent turmoil in the financial markets.



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As mentioned, DOY tracks the inverse price performance of the Benchmark plus the net income from the Treasuries less any daily income distribution obligations to the Up Trust and Down Trust expenses. Assuming no net investment loss and that the Down Trust assets are fully funded at $25.00 per share, plus net income less any obligations due under the income distribution agreement and settlement agreement, the underlying value per share should decrease by twenty five cents for every dollar increase in the oil Benchmark above $100.00 per barrel. For example, if the Benchmark NYMEX Designated Oil Futures Contract (Benchmark) increases by one dollar in a given day, DOY will accrue interest on the Treasuries and will owe twenty five cents per share of additional performance to the Up Trust and the interest earned under the income distribution agreement on the change of performance for the day after expenses. Since each paired share unit is created with a value equal to 50,000 shares of Up MacroShares at $25.00 plus the accrued net income and 50,000 shares of Down MacroShares at $25.00 plus accrued net income, the Authorized Participant receives 50,000 shares of UOY and 50,000 shares of DOY at the underlying value with a combined value of $50.00 per share plus (minus) accrued net income (loss). The relationship between changes in the Benchmark and the per share underlying value of a Down MacroShare will be as described only so long as the amount of cash and treasuries (not including income on the treasuries) on deposit in the Down Trust is equal to the aggregate par amount of all Down MacroShares that are outstanding from time to time. If the amount of cash and treasuries in the Down Trust is less than the aggregate par amount of the Down MacroShares (as was the case at December 31, 2008), because the fees and expenses of the Down Trust have exceeded its treasury income during one or more calculation periods, a specified change in the Benchmark will still result in the same percentage change in per share underlying value, but not the same dollar amount, because each Down MacroShare will represent, in effect, a smaller exposure to oil. (See Exhibit 1c).

Exhibit 1a

[down10q002.gif]

For the three months ended December 31, 2008, DOYs underlying value tracked the Benchmark within a average price differential of $0.56 (1.58% of DOYs average daily underlying value).  This average is made up of a daily range of ($0.32) to $(0.81) during the quarter. (See Exhibit 1b).



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Exhibit 1b

[down10q004.gif]

This difference in DOYs underlying value and the Benchmark is due to the low interest rate yields of the Treasuries less expenses and the net impact of the income distribution and settlement contract agreements. There were no distributions on DOY for the three months ended December 31, 2008 as contractual and variable trust fees exceeded the yields on short-term Treasuries, overnight U.S. government repo and cash balances.

For the period from July 1, 2008 to September 30, 2008, and for the period from October 1, 2008 to December 31, 2008, UOY was not able to pay any income to investors due to the rapid decline in T-bill and overnight government repo yields. Yields fell significantly from approximately 2.00% at midyear to basis point yields approaching zero as investors sought a safe haven for assets as a result of the recent turmoil in the financial markets. For the period from October 1, 2008 to December 31, 2008, UOYs underlying value tracked the Benchmark within an average price differential of $0.56 (4.33% of UOYs average daily underlying value).  This average is made up of a daily range of ($0.32) to ($0.80) during the quarter. (See Exhibit 1c).



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Exhibit 1c

[down10q006.gif]

The difference in UOYs underlying value and the Benchmark was due to trust expenses exceeding the yields on the Treasuries. The objective of UOY is for its underlying value to track the designated Benchmark and, if available, to pay a quarterly distribution based on earned interest income less expenses.  UOY achieved its goal of its underlying value tracking the designated Benchmark with a resultant tracking variance of (4.33%) to the Benchmark due to the low Treasury yields, and the impact of the contractual and variable trust expenses on a declining asset base during the quarter. The market price correlation during the quarter ended December 31, 2008 was 80.81% as the UOY market price traded at an average 22.50% premium to the underlying value of the Up MacroShares as investors expected higher prices in the latter part of the quarter as a consequence of the dramatic decline in the price of Crude Oil and a growing belief that a near term bottom in the price of Crude Oil had been achieved. The decline in the price of Crude Oil reflects the U.S. and world economies having entered into a period significant slowdown and growing financial turmoil. (See Exhibit 1d).



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Exhibit 1d

[down10q008.gif]



The mix of UOY and DOY investors seek to achieve long-term exposure to commodities, obtain a hedge against a portfolio of oil company stocks, or to express a directional view on oil prices. The secondary market for UOY and DOY reflected the expectations of investors in regards to the long-term price of oil. The oil futures curve has remained in contango in the near-term prices as the price of oil has dropped significantly. During the quarter, the market price of the Benchmark futures settled at a high of $98.53 per barrel on October 1, 2008 and to a low of $35.35 on the close of December 24, 2008. The closing market price of the Benchmark futures was $44.60 on December 31, 2008.

The premiums and discounts were even more significant in DOY as the market value of DOY increased as oil prices declined during the quarter and the daily price changes decreased as a percentage of the market price of DOY as the market prices of oil declined. The maximum discount for DOY was 13.28% during the period of higher oil prices early in the quarter and reflected the increasing weakness in the U.S economy and in the financial markets. Although the premiums and discounts in UOY and DOY on a paired basis were generally equal and offsetting in dollar terms the percentages of change were not always equal because the securities each had different dollar values in the market. The average of the paired premium and discounts for the initial quarter of trading was a paired discount of 0.45%.

Due to the paired structure design and the five year term of MacroShares, supply and demand of UOY and DOY determine a portion of the pricing mix between the two products. Currently arbitrageurs in UOY and DOY trade at various points along the Oil futures curves as the premiums and discounts in UOY and DOY change in relationship to the NYMEX futures curve. The other popular arbitrage trade in UOY and DOY would be the mis-pricing of the paired shares to the sum of their underlying value. This arbitrage contributed to keeping the paired prices close to their underlying values as any mis-pricing would lead to creation and redemption activity to realize potential gains. UOY experienced greater trading volumes than DOY during the latter part of the quarter ended December 31, 2008 and hence provided more investor transparency in pricing expectations at December 31, 2008.

Creation and/or redemptions must occur for both UOY and DOY as one unit, accordingly, the underlying value of UOY and DOY including accrued interest equals the aggregate creation/redemption amount plus Trustee creation/redemption fees of $2,000 per transaction. For the three months ended December 31, 2008, the paired market values tracked the paired underlying values within 45 basis points. Day to day the differences were varied, but collectively over the period were in line with competitive products.



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For the three months ended December 31, 2008,UOYs daily exchange price change exhibited a 80.81% correlation to the underlying value changes in UOY. The average daily market price for the period of UOY was $16.90 per share. The average underlying value of UOY was $14.25 per share.  On a per share basis, UOY ran an average daily dollar market price premium of $2.65 or 22.50% of underlying value on a daily average. (See Exhibit 2a)

Exhibit 2a

[down10q010.gif]

For the three months ended December 31, 2008, DOYs daily exchange price change had a 74.00% correlation to the underlying value. The average daily market price of DOY was $31.75 per share. DOYs average daily underlying value was $34.63 per share. For the three months ended December 31, 2008, DOY traded at an average daily dollar discount of ($2.87) per share which was 7.97% below its average daily underlying value. DOY tracked the inverse price performance of the Benchmark NYMEX Designated Oil Futures Contract.



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Exhibit 2b

[down10q012.gif]

Throughout the three months ended December 31, 2008, DOY was priced at a discount to its underlying value, after having been priced at a premium to its underlying value since the inception of the Trust. This change reflects the fundamental shift in the Crude Oil futures curve from a backwardated market (expectation of lower prices in the future) to a contango market (expectation of higher prices in the future). DOY reached a maximum discount of 13.28% on December 18, 2008 when the premium on UOY was at 44.48%. Investors should note that on this date, in dollar terms, the premium on UOY was $4.31 per share and the discount on DOY was $5.16 for a net difference of $0.85. This excess discount to the actual paired value of $48.87 was equal to -0.45% of their combined underlying value.

In summary, the anticipated performance of UOY and DOY, as measured by changes in underlying value, as defined within the UOY and DOY prospectuses, has been achieved by the trusts. The market performance of UOY and DOY toward the end of the quarter generally tracked the performance of the Benchmark as the bubble in oil prices evident in mid-year deflated significantly by the end of December 2008. Macro Financial, LLC continues to educate investors on the significant decline in premiums and discounts and the lack of income yield resulted in little overall asset growth in the trusts during the quarter.

The overall product objectives of Macro Financial and MacroMarkets continues to be the expansion of risk management tools and investment products that provide investors diverse long-term exposures to assets with desirable risk/return characteristics and lower correlations to equities, debt and cash. The expansion of risk management tools will be achieved through the continued development of enhanced passive product structures with clear investment objectives.

Item 2A.

Review of Financial Results

Results of Operations

On June 27, 2008, the Down Trust established its starting level at $100.00 per share and issued 400,000 shares to the initial authorized purchaser at the value of the equity attributable to such units of $7,500,000.  Such shares were issued at their initial underlying value of $18.75 per share. At December 31, 2008, the Down Trusts underlying value was approximately $15,783,000.

During the three month period ended December 31, 2008 there were no issuances or redemptions of Down MacroShares.



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At December 31, 2008, the Down Trust's underlying value grew to approximately $15,783,000 resulted from creation and redemption activity aggregating 550,000 shares (11 units) being created and 500,000 shares (10 units) being redeemed during the period from July 1, 2008 to December 31, 2008, and an increase in the fair value of the settlement contracts and the income distribution agreement with the Up Trust. Each unit consists of 50,000 shares. In addition, the Down Trusts underlying value at December 31, 2008 was $35.07 a share as compared to $24.25 a share at September 30, 2008. The increase in underlying value from September 30, 2008 of $10.82 a share results primarily from an increase in the per share fair value of the settlement contracts and the income distribution agreement with the Up Trust, which resulted from the significant decrease in the Applicable Reference Price of Crude Oil during the period.

The Trust generated investment income of approximately $8,500 during the quarter ended December 31, 2008 as a result of its investment in repurchase agreements and U.S. Treasury obligations. Additionally, as the valuation of the settlement contracts increased during the period the Trust generated $5,071,500 of net unrealized gains on the settlement contracts and the income distribution agreement. During the quarter ended December 31, 2008, the net investment loss of the Trust and the net unrealized gain on the settlement contracts and the income distribution agreement were $382,238 and $8,477,000, respectively.

Liquidity

On January 9, 2009 the Board of Managers of Macro Securities Depositor declared a four for one share split on both the Up MacroShares and Down MacroShares. The Board believes that the increase in the number of shares outstanding and the lower share price will increase market liquidity in the products.

To the extent of managements knowledge, there are no trends or demands, commitments, events, or uncertainties that will result in, or that are reasonably likely to result in, the Down Trusts liquidity increasing or decreasing in any material way. The main obligations of each of the Up Trust and Down Trust are its obligations, if any, pursuant to the Income Distribution Agreement and Settlement Contracts. The Up Trust and Down Trust hold U.S Treasuries and repurchase agreements on U.S. Treasuries to secure each of its obligations under the Income Distribution Agreement and the Settlement Contracts.



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Cash Flows From Operations

|                                                                                                                    |  |   |             |  
|------------------------------------------------------------------------------------------------------------------- |  | - | ----------- | -
|For the period from June 27, 2008 (commencement of operations) to December 31, 2008 (unaudited)                    
|                                                                                                                    |  |   |            
|Cash flows from operating activities:                                                                               |  |   |            
|Net income                                                                                                          |  | $ | 8,094,762   |  
|Adjustments to reconcile net income to net cash used in operating activities:                                       |  |   |             |  
|Net unrealized appreciation on settlement contracts and income distribution agreement                               |  |   | (5,738,000  | )
|Settlement receipts in excess of realized gains or losses on settlement contracts and income distribution agreement |  |   | (3,724,000  | )
|Increase (decrease) in operating assets and liabilities:                                                            |  |   |             |  
|Interest receivable                                                                                                 |  |   | (3          | )
|Operating expenses payable                                                                                          |  |   | 245,405     |  
|                                                                                                                    |  |   |             |  
|Net cash used in operations                                                                                         |  |   | (1,121,836  | )
|                                                                                                                    |  |   |             |  
|Cash flows from financing activities:                                                                               |  |   |             |  
|                                                                                                                    |  |   |             |  
|Contributions                                                                                                       |  |   | 23,727,140  |  
|Redemptions                                                                                                         |  |   | (11,451,040 | )
|                                                                                                                    |  |   |             |  
|Net cash provided by financing activities                                                                           |  |   | 12,276,100  |  
|                                                                                                                    |  |   |             |  
|Net increase in cash and cash equivalents                                                                           |  |   | 11,154,264  |  
|                                                                                                                    |  |   |             |  
|Cash and cash equivalents, beginning of period                                                                      |  |   | 1,000       |  
|Cash and cash equivalents, end of period                                                                            |  | $ | 11,155,264  |  



Valuation method of the Settlement Contracts and the Income Distribution Agreement

For the purpose of financial reporting, the settlement contracts and income distribution agreement constitute derivative contracts. Accordingly, these derivative contracts are recorded in the financial statements at fair value, as determined by the Administrative Agent. As there is no market for these derivative contracts, and no such market is expected to develop, the Administrative Agent determines the fair value of these derivative contracts by reference to various inputs. These inputs include the contractual amount due to or from the other trust, applicable market indices, and the prices of transactions in Down Trust Shares on the NYSE Arca. Throughout the three months ended December 31, 2008, the Administrative Agent determined, based upon various inputs the most significant of which was transactions for the Down Trust Shares in the open market, that fair valuation for these derivative contracts was more appropriately based upon prices of transactions in Down Trust Shares and Up Trust Shares.

As a result, the per share value on December 31, 2008, for financial reporting purposes, based upon the fair valuation determination by the Administrative Agent, was $35.07 ($8.77 per share after giving effect to the share split described in Note J to the Financial Statements). The per share Underlying Value for the same day was $38.09 ($9.52 per share after giving effect to the share split described in Note J to the Financial Statements). The Administrative Agent will continue to evaluate the fair value of these derivative contracts for each financial reporting period.

Off-Balance Sheet Arrangements

The Down Trust is not a party to any off-balance sheet arrangements.



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Item 3.

Quantitative and Qualitative Disclosures about Market Risk

The Trust Agreement does not authorize the trustee to borrow for payment of the Down Trust's ordinary expenses. The Down Trust does not engage in transactions in foreign currencies which could expose it or its shareholders to any foreign currency related market risk. The Down Trust does not invest in any derivative financial instruments (other than the income distribution agreement and the settlement contracts) and has no foreign operations or long-term debt instruments.

Item 4.

Controls and Procedures

The Depositor maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in the Down Trust's Exchange Act reports is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, and that such information is accumulated and communicated to the Chief Executive Officer and the Chief Financial Officer of the Depositor, and to the audit committee of MacroMarkets LLC which have been authorized by its Board of Managers to oversee the financial reporting of the Down Trust to allow timely decisions regarding required disclosure.

Under the supervision and with the participation of the Chief Executive Officer and the Chief Financial Officer of the Depositor, the Depositor conducted an evaluation of the Down Trust's disclosure controls and procedures, as defined under Exchange Act Rule 13a-15(e). Based on this evaluation, the Chief Executive Officer and the Chief Financial Officer of the Depositor concluded that, as of December 31, 2008, the Down Trust's disclosure controls and procedures were effective.

There was no change in the Down Trust's internal controls over financial reporting that occurred during the Down Trust's most recently completed fiscal quarter ended December 31, 2008 that has materially affected, or is reasonably likely to materially affect, these internal controls.



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PART II. OTHER INFORMATION

Item 1.

Legal Proceedings

None.

Item 1A.

Risk Factors

During the past two years, treasury rates have been at relatively low levels compared to historical rate levels over the past two decades. Further decreases in these rates have occurred as a result of the large-scale policies and programs recently adopted by the U.S. federal government, the goal of which was to support and stimulate capital market activity. These policies have included a series of coordinated actions by the U.S. Treasury and the Federal Reserve designed to alleviate currently severe credit market dislocations by injecting liquidity into the financial system. The impacts to date of these monetary policies and government interventions have included decreases in short-term interest rates to historically low levels. More notable, the current economic crisis has resulted in a huge increase in global demand for dollar-denominated, short-term, high-credit quality assets such as U.S. treasuries, which has caused the yield on such assets to decrease significantly. The current economic conditions and some of the government policies aimed at alleviating them may cause prevailing interest rates to remain low for an extended period of time; if this occurs, less income will be available to cover the fee deduction amount and, as a result, little or no quarterly distributions will be made by the Down Trust on the Down MacroShares, and the per share underlying value of your Down MacroShares will be reduced by the amount of the Down Trusts assets (in excess of its treasury income) that need to be applied to pay such fees and expenses in full.

Item 2.

Unregistered Sales of Equity Securities and Use of Proceeds

The Down MacroShares are offered on a continuous basis pursuant to the Down Trust registration statement (Registration No. 333-150282). The proceeds from the sale of the Down MacroShares are invested, on each Distribution Date, in U.S. government securities that are scheduled to mature not later than the immediately following Distribution Date and over-night repurchase agreements fully collateralized by U.S. government securities.

The information contained in Part I, Item 2 under Review of Financial Results, Results of Operations, is hereby incorporated by reference.

Dividends

Not Applicable

Issuer Purchase of Equity Securities

The Down Trust does not purchase shares directly from its shareholders. However, as part of Paired Optional Redemptions by Authorized Participants of MacroShares Units consisting of 50,000 Up MacroShares and 50,000 Down MacroShares redeemed, respectively, the Down MacroShares may be redeemed in units of 50,000 shares. From April 14, 2008 (date of Down Trust initial capitalization) to June 30, 2008 there were no redemptions other than the redemption of Founders Shares on June 30, 2008 upon the purchase of Down MacroShares by the initial Authorized Participant. During the six month period from July 1, 2008 to December 31, 2008, 10 units (500,000 shares) were redeemed. There were no redemptions during the three month period ended December 31, 2008.

Item 3.

Defaults Upon Senior Securities

None.

Item 4.

Submission of Matters to a Vote of Security Holders

None.

Item 5.

Other Information

None.



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Item 6.

Exhibits

|               |  |                                                                                                                        
|-------------- |  | -----------------------------------------------------------------------------------------------------------------------
|Exhibit
Number |  | Description                                                                                                            
|              |  | MacroShares $100 Oil Down Trust prospectus, dated as of August 22, 2008*                                               
|31.1           |  | Certification Pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002                                             
|31.2           |  | Certification Pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002                                             
|32.1           |  | Certification Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002  
|32.2           |  | Certification Pursuant to 18 U.S.C.  Section 1350  as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002



*

Denotes a document that was previously filed as part of the Registration Statement of the MacroShares $100 Oil Down Trust, File No. 333-150282-02.



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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 in the capacities indicated thereunto duly authorized.

| |  |  |                                                              
| |  |  | -------------------------------------------------------------
| |  |  | MACRO SECURITIES DEPOSITOR, LLC,                             
| |  |  | Depositor for the MacroShares                                
| |  |  | $100 Oil Down Trust                                          
| | 
| |  |  | /s/ SAMUEL MASUCCI, III                                      
| |  |  | Samuel Masucci, III                                          
| |  |  | Chief Executive Officer of Depositor,
on behalf of Registrant
| |  |  |                                                              
| |  |  | /s/ JOHN A. FLANAGAN                                         
| |  |  | John A. Flanagan                                             
| |  |  | Chief Financial Officer of Depositor,
on behalf of Registrant

Date: February 17, 2009



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