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**UNITED      STATES**

**SECURITIES      AND EXCHANGE COMMISSION**

**Washington,      D.C. 20549**

**FORM      10-K**

**[X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT      OF      1934**

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

|   | Delaware                                                                                    |   | 13-3416059                                                         |   |
|--------|---------------------------------------------------------------------------------------------|--------|--------------------------------------------------------------------|--------|
|   | (State                or other jurisdiction ofincorporation                or organization) |   | (I.R.S.                Employer Identification                No.) |   |

|   | o                Yes |   |  x                No |
|--------|----------------------|--------|---------------------------|

|   | o                Yes |   | x                No |
|--------|----------------------|--------|---------------------|

|   | x                Yes |   | o                No |
|--------|----------------------|--------|---------------------|

| Large                accelerated filer o | Accelerated                filer o |  Non-accelerated                filer x |
|------------------------------------------|------------------------------------|----------------------------------------------|

**DOCUMENTS      INCORPORATED BY REFERENCE**

**PART        I**

**Item        1.        Business. **

**Item        1A. Risk Factors.**

**Item        1B. Unresolved Staff Comments.**

**Item        2. Properties.**

**Item        3. Legal Proceedings. **

**Item        4. Submission of Matters to a Vote of Security Holders.**

**PART        II**

**Item        5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer        Purchases of Equity Securities.**

**Item        6. Selected Financial Data.**

**Item        7. Management’s Discussion and Analysis of Financial Condition and Results of        Operation.**

**Item        7A. Quantitative and Qualitative Disclosures About Market        Risk.**

**Item        8. Financial Statements and Supplementary Data.**

**Item        9. Changes in and Disagreements With Accountants on Accounting and Financial        Disclosure.**

**Item        9A. Controls and Procedures.**

**Item        9B. Other Information.**

**PART        III**

**Item        10. Directors and Executive Officers of the Registrant.**

**Item        11. Executive Compensation.**

**Item        12. Security Ownership of Certain Beneficial Owners and Management and Related        Stockholder Matters.**

**Item        13. Certain Relationships and Related Transactions.**

**Item        14. Principal Accounting Fees and Services.**

**Item        1112(b) of Regulation AB. Significant Obligors Financial        Information.**

**Item        1114(b)(2) and 1115(b) of Regulation AB. Significant Enhancement Provider        Financial Information.**

**Item        1117 of Regulation AB. Legal Proceedings**

**Item        1119 of Regulation AB. Affiliations and Certain Relationships and Related        Transactions**

**Item        1122 of Regulation AB. Compliance with Applicable Servicing        Criteria.**

**Item        1123 of Regulation AB. Servicer Compliance Statement**

**              **

**PART        IV**

**Item        15. Exhibits, Financial Statement Schedules.**

| **Exhibit                    Number** | **Description**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|---------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4(i)                                  | The                    series 2006-4 pooling and servicing agreement dated as of December                    1, 2006                    among Merrill Lynch Mortgage Investors, Inc., as depositor (the                    “Depositor”), Midland Loan Services, Inc., as master servicer no. 1                    (the “Master Servicer No. 1”), Wells Fargo Bank National Association,                    as master servicer no. 2 (the "Master Servicer No. 2"), LNR Partners,                    Inc., as special servicer (the "Special Servicer") and LaSalle                    Bank National Association, as trustee (the “Trustee”) (the "Pooling and                    Servicing Agreement") (Previously filed as part of the Registrant's                    Current Report on Form 8-K on December                    26, 2006)* |
| 31(ii)                                | Rule                    13a-14(d)/15d-14(d) Certifications                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| 33(a)                                 | Report                    on assessment of compliance with servicing criteria for asset-backed                    securities, Midland Loan Services, Inc., as Master Servicer No.                    1 and as                    master servicer No. 2 in regards to the Park La Brea Pari Passu                    Companion Loan under the J.P. Morgan Chase Commercial Mortgage                    Securities                    Trust 2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| 33                    (b)             | Report                    on assessment of compliance with servicing criteria for asset-backed                    securities, Wells Fargo Bank National Association, as Master                    Servicer No.                    2 and as master servicer No. 1. in regards to the Park La Brea                    Pari Passu                    Companion Loan under the J.P. Morgan Chase Commercial Mortgage                    Securities                    Trust 2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 33(c)                                 | Report                    on assessment of compliance with servicing criteria for asset-backed                    securities, LNR Partners, Inc., as Special Servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| 33(d)                                 | Report                    on assessment of compliance with servicing criteria for asset-backed                    securities, LaSalle Bank National Association, as Trustee and                    as trustee                    in regards to the Park La Brea Pari Passu Companion Loan under                    the J.P.                    Morgan Chase Commercial Mortgage Securities Trust                    2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| 33(e)                                 | Report                    on assessment of compliance with servicing criteria for asset-backed                    securities, J.E. Robert Company, Inc., as special servicer in regards                    to the Park La Brea Pari Passu Companion Loan under the J.P.                    Morgan Chase                    Commercial Mortgage Securities Trust 2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| 34(a)                                 | Attestation                    report on assessment of compliance with servicing criteria for                    asset-backed securities, Midland Loan Services, Inc., as Master                    Servicer                    No. 1 and as master servicer No. 2 in regards to the Park La Brea                    Pari Passu Companion Loan under the J.P. Morgan Chase Commercial                    Mortgage                    Securities Trust 2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 34(b)                                 | Attestation                    report on assessment of compliance with servicing criteria for                    asset-backed securities, Wells Fargo Bank National Association,                    as Master                    Servicer No. 2 and as master servicer No. 1. in regards to the                    Park La                    Brea Pari Passu Companion Loan under the J.P. Morgan Chase Commercial                    Mortgage Securities Trust 2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| 34(c)                                 | Attestation                    report on assessment of compliance with servicing criteria for                    asset-backed securities, LNR Partners, Inc., as Special                    Servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 34(d)                                 | Attestation                    report on assessment of compliance with servicing criteria for                    asset-backed securities, LaSalle Bank National Association, as                    Trustee and                    as trustee in regards to the Park La Brea Pari Passu Companion                    Loan under                    the J.P. Morgan Chase Commercial Mortgage Securities Trust                    2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| 34(e)                                 | Attestation                    report on assessment of compliance with servicing criteria for                    asset-backed securities, J.E. Robert Company, Inc., as special                    servicer in                    regards to the Park La Brea Pari Passu Companion Loan under the                    J.P.                    Morgan Chase Commercial Mortgage Securities Trust                    2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| 35(a)                                 | Servicer                    compliance statement, Midland Loan Services, Inc., as Master                    Servicer                    No.1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| 35(b)                                 | Servicer                    compliance statement, Wells Fargo Bank National Association,                    as Master                    Servicer No. 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| 35(c)                                 | Servicer                    compliance statement, LNR Partners, Inc., as Special                    Servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| 35(d)                                 | Servicer                    compliance statement, LaSalle Bank National Association, as                    Trustee                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| 35(e)                                 | Servicer                    compliance statement, Wells Fargo Bank, N.A., as master servicer                    No.1, in                    regards to the Park La Brea Pari Passu Companion Loan under the                    J.P.                    Morgan Chase Commercial Mortgage Securities Trust                    2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| 35(f)                                 | Servicer                    compliance statement , Midland Loan Services, Inc., as master                    servicer No.                    2, in regards to the Park La Brea Pari Passu Companion Loan under                    the J.P.                    Morgan Chase Commercial Mortgage Securities Trust                    2006-LDP8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| 99                                    | Significant                    Enhancement Provider Financial Information, class AJ-FL                    certificates                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |

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**SIGNATURES**

|                                     | Merrill                  Lynch Mortgage Investors, Inc., as Depositor                                                                               |
|------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|
|                                     |                                                                                                                                                |
|  March                29, 2007 | /s/                David Rodgers                                                                                                                    |
|                                     | By: David                Rodgers                                                                                                               |
|                                     | Title: Executive                Vice President and Chief                Officer in Charge of Commercial Mortgage                Securitization |

**Supplemental          Information to be Furnished With Reports Filed Pursuant to Section 15(d)          of the          Act by Registrants Which Have Not Registered Secuirities Pursuant to Section          12          of the Act**

| (a)    | (1)                    No annual report is provided to the certificateholders.                                                                                                                                                                                                      |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | (2)                    No proxy statement, form of proxy or other proxy soliciting material                    has                    been sent to any certificateholders with respect to any annual                    or other                    meetings of certificateholders. |

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**EXHIBIT      INDEX**

| **Exhibit                        Number** | **Description**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|-------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 4(i)                                      | The                        Pooling and Servicing Agreement (Previously filed as part                        of the                        Registrant's Current Report on Form 8-K on December                        26, 2006)*                                                                                                                                                                                                                                                                                                            |
| 31(ii)                                    | Rule                        13a-14(d)/15d-14(d) Certifications                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| 33(a)                                     | Report                        on assessment of compliance with servicing criteria for asset-backed                        securities, Midland Loan Services, Inc., as Master Servicer                        No. 1 and as                        master servicer No. 2 in regards to the Park La Brea Pari Passu                        Companion Loan under the J.P. Morgan Chase Commercial Mortgage                        Securities                        Trust 2006-LDP8                                                                 |
| 33                        (b)             | Report                        on assessment of compliance with servicing criteria for asset-backed                        securities, Wells Fargo Bank National Association, as Master                        Servicer No.                        2 and as master servicer No. 1. in regards to the Park La                        Brea Pari Passu                        Companion Loan under the J.P. Morgan Chase Commercial Mortgage                        Securities                        Trust 2006-LDP8                                    |
| 33(c)                                     | Report                        on assessment of compliance with servicing criteria for asset-backed                        securities, LNR Partners, Inc., as Special Servicer                                                                                                                                                                                                                                                                                                                                                                        |
| 33(d)                                     | Report                        on assessment of compliance with servicing criteria for asset-backed                        securities, LaSalle Bank National Association, as Trustee                        and as trustee                        in regards to the Park La Brea Pari Passu Companion Loan                        under the J.P.                        Morgan Chase Commercial Mortgage Securities Trust                        2006-LDP8                                                                                            |
| 33(e)                                     | Report                        on assessment of compliance with servicing criteria for asset-backed                        securities, J.E. Robert Company, Inc., as special servicer in regards                        to the Park La Brea Pari Passu Companion Loan under the J.P.                        Morgan Chase                        Commercial Mortgage Securities Trust 2006-LDP8                                                                                                                                                   |
| 34(a)                                     | Attestation                        report on assessment of compliance with servicing criteria                        for                        asset-backed securities, Midland Loan Services, Inc., as                        Master Servicer                        No. 1 and as master servicer No. 2 in regards to the Park La Brea                        Pari Passu Companion Loan under the J.P. Morgan Chase Commercial                        Mortgage                        Securities Trust 2006-LDP8                              |
| 34(b)                                     | Attestation                        report on assessment of compliance with servicing criteria                        for                        asset-backed securities, Wells Fargo Bank National Association,                        as Master                        Servicer No. 2 and as master servicer No. 1. in regards to                        the Park La                        Brea Pari Passu Companion Loan under the J.P. Morgan Chase                        Commercial                        Mortgage Securities Trust 2006-LDP8 |
| 34(c)                                     | Attestation                        report on assessment of compliance with servicing criteria                        for                        asset-backed securities, LNR Partners, Inc., as Special                        Servicer                                                                                                                                                                                                                                                                                                              |
| 34(d)                                     | Attestation                        report on assessment of compliance with servicing criteria                        for                        asset-backed securities, LaSalle Bank National Association,                        as Trustee and                        as trustee in regards to the Park La Brea Pari Passu Companion                        Loan under                        the J.P. Morgan Chase Commercial Mortgage Securities Trust                        2006-LDP8                                                         |
| 34(e)                                     | Attestation                        report on assessment of compliance with servicing criteria                        for                        asset-backed securities, J.E. Robert Company, Inc., as special                        servicer in                        regards to the Park La Brea Pari Passu Companion Loan under                        the J.P.                        Morgan Chase Commercial Mortgage Securities Trust                        2006-LDP8                                                                       |
| 35(a)                                     | Servicer                        compliance statement, Midland Loan Services, Inc., as Master                        Servicer                        No.1                                                                                                                                                                                                                                                                                                                                                                                             |
| 35(b)                                     | Servicer                        compliance statement, Wells Fargo Bank National Association,                        as Master                        Servicer No. 2                                                                                                                                                                                                                                                                                                                                                                                  |
| 35(c)                                     | Servicer                        compliance statement, LNR Partners, Inc., as Special                        Servicer                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| 35(d)                                     | Servicer                        compliance statement, LaSalle Bank National Association,                        as                        Trustee                                                                                                                                                                                                                                                                                                                                                                                |
| 35(e)                                     | Servicer                        compliance statement, Wells Fargo Bank, N.A., as master servicer                        No.1, in                        regards to the Park La Brea Pari Passu Companion Loan under                        the J.P.                        Morgan Chase Commercial Mortgage Securities Trust                        2006-LDP8                                                                                                                                                                                        |
| 35(f)                                     | Servicer                        compliance statement , Midland Loan Services, Inc., as master                        servicer No.                        2, in regards to the Park La Brea Pari Passu Companion Loan                        under the J.P.                        Morgan Chase Commercial Mortgage Securities Trust                        2006-LDP8                                                                                                                                                                                 |
| 99                                        | Significant                          Enhancement Provider Financial Information, class AJ-FL                          certificates                                                                                                                                                                                                                                                                                                                                                                                                                   |