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

                                 SCHEDULE 13D/A


                    UNDER THE SECURITIES EXCHANGE ACT OF 1934


                         CHIMERA INVESTMENT CORPORATION
                         ------------------------------
                                (Name of Issuer)


                          COMMON STOCK, PAR VALUE $0.01
                          -----------------------------
                         (Title of Class of Securities)

                                    16934Q109
                                    ---------
                                 (CUSIP Number)

                             R. Nicholas Singh, Esq.
                  Executive Vice President and General Counsel
                         Annaly Capital Management, Inc.
                     1211 Avenue of the Americas, Suite 2902
                            New York, New York 10036
                               Tel: (212) 696-0100
                               FAX: (212) 696-9809
                               -------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)


                                OCTOBER 29, 2008
                                ----------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule  because of Rule 13d-1(e),  Rule 13d-1(f) or Rule  13d-1(g),  check the
following box / /.

                         (Continued on following pages)






1        NAME OF REPORTING PERSONS
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Annaly Capital Management, Inc.

2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP  (a) /  /   (b) /  /
                                                           -------------------



3        SEC USE ONLY

4        SOURCE OF FUNDS

         PF

5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO
         ITEMS 2(d) OR 2(e): /  /

6        CITIZENSHIP OR PLACE OF ORGANIZATION

         Maryland

NUMBER OF SHARES BENEFICIALLY OWNED BY REPORTING PERSON WITH

7        SOLE VOTING POWER

         15,302,996

8        SHARED VOTING POWER

         0

9        SOLE DISPOSITIVE POWER

         15,302,996

10       SHARED DISPOSITIVE POWER

         0

11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         15,302,996

12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN SHARES / /

13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

         8.6%

14       TYPE OF REPORTING PERSON
         CO



                                  SCHEDULE 13D
                         RELATING TO THE COMMON STOCK OF
                         CHIMERA INVESTMENT CORPORATION

ITEM 1.  SECURITY AND ISSUER.

         This  statement  on Schedule  13D/A (this  "Statement")  relates to the
         common  stock,  par value  $0.01 per share  (the  "Common  Stock"),  of
         Chimera Investment Corporation, a Maryland corporation (the "Issuer").

         The  principal  executive  offices of the  Issuer  are  located at 1211
         Avenue of the Americas, Suite 2902, New York, New York 10036.

ITEM 2.  IDENTITY AND BACKGROUND.

         (a)  Annaly Capital Management, Inc. ("Annaly")

         (b)  Annaly is a Maryland  corporation  and its principal  office is at
              1211 Avenue of the Americas, Suite 2902, New York, New York 10036.

         (c)  Annaly  manages assets on behalf of  institutional  and individual
              investors  worldwide directly through Annaly and through the funds
              managed by Fixed Income Discount  Advisory  Company  ("FIDAC"),  a
              wholly-owned  subsidiary of Annaly. Annaly is primarily engaged in
              the  business  of  investing,   on  a  leveraged  basis,  in  U.S.
              government agency mortgage-backed securities.  FIDAC serves as the
              external investment manager of the Issuer pursuant to a management
              agreement.

         (d)  During the last five  years,  Annaly has not been  convicted  in a
              criminal proceeding.

         (e)  During the last five years, Annaly has not been a party to a civil
              proceeding  of a  judicial  or  administrative  body of  competent
              jurisdiction  and as a result of such proceeding been subject to a
              judgment, decree or final order enjoining future violations of, or
              prohibiting or mandating  activities  subject to, federal or state
              securities law or finding any violation with respect to such law.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

         Annaly purchased  3,621,581 shares of Common Stock on November 21, 2007
         pursuant to the Stock Purchase Agreement,  dated November 21, 2007. The
         aggregate  purchase price of the 3,621,581  shares of Common Stock (the
         "Previously Owned Shares")  acquired by Annaly was $54,323,715.  Annaly
         provided  internally  generated funds to pay the purchase price for the
         Previously Owned Shares.

         Annaly purchased  11,681,415 shares of Common Stock on October 29, 2008
         pursuant to the Stock Purchase  Agreement,  dated October 29, 2008. The
         aggregate  purchase  price of the shares of Common  Stock (the  "Annaly
         Shares") acquired by Annaly was $26,283,184. Annaly provided internally
         generated funds to pay the purchase price for the Annaly Shares.

         The aggregate  purchase price of the 3,621,581  Previously Owned Shares
         acquired by Annaly in November  2007 and the  11,681,415  Annaly Shares
         acquired by Annaly in October 2008 is $80,606,899.

ITEM 4.  PURPOSE OF THE TRANSACTION.

         Annaly  acquired the Annaly  Shares for  investment  purposes only in a
         private  offering  from  the  Issuer  immediately  after  the  Issuer's
         follow-on  public  offering  of Common  Stock.  Annaly  has no plans or
         proposals  that  relate to or would  result in any of the  transactions
         specified in clauses (a) through (j) of Item 4 of Schedule 13D,  except
         for



         the following. Annaly's wholly owned subsidiary, FIDAC, is the Issuer's
         external investment manager, and it can be expected that the Issuer may
         access the capital  markets from time to time pursuant to  underwritten
         public  offerings.  In addition,  the Issuer, in the ordinary course of
         its business,  will be purchasing whole mortgage loans and asset backed
         securities,  and it can be expected that these assets will be sold from
         time to time.  Annaly  reserves the right to change its  intentions and
         plans at any time it deems appropriate.

         In addition,  the matters set forth in Item 6 below are incorporated in
         this Item 4 by reference as if fully set forth herein.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

         Annaly  beneficially  owns an aggregate of 15,302,996  shares of Common
         Stock, which represents 8.6% of the outstanding shares of Common Stock.
         The  percentage  is  based  on  177,170,098   shares  of  Common  Stock
         outstanding on October 29, 2008.

         Annaly  has the sole  power to vote and the sole  power to  dispose  of
         15,302,996 shares of Common Stock.

         The  Issuer and  Annaly  entered  into a stock  purchase  agreement  on
         October  29,  2008 (the "Stock  Purchase  Agreement").  Pursuant to the
         Stock Purchase  Agreement,  Annaly  acquired the Annaly Shares from the
         Issuer on October 29, 2008.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
SECURITIES OF THE ISSUER.

         STOCK PURCHASE AGREEMENT:

         The Issuer and Annaly  entered  into the Stock  Purchase  Agreement  on
         October 29,  2008.  Pursuant to the Stock  Purchase  Agreement,  Annaly
         acquired the Annaly Shares from the Issuer on October 29, 2008.

         Annaly  will not until the earlier of (i) the date which is three years
         after  October  29,  2008 or (ii)  the  termination  of the  management
         agreement  between  the  Issuer and FIDAC,  without  the prior  written
         consent of the Issuer,  sell, pledge, or otherwise dispose of, directly
         or indirectly, the shares of Common Stock of the Issuer.

         MANAGEMENT AGREEMENT:

         The Issuer is externally  managed and advised by FIDAC,  a wholly owned
         subsidiary  of Annaly.  The Issuer and FIDAC  entered into a management
         agreement  on  November  21,  2007,  as amended on October 13, 2008 and
         October  19,  2008.  Pursuant  to  the  management   agreement,   FIDAC
         implements the Issuer's business strategy and performs certain services
         for  the  Issuer,  subject  to  oversight  by  the  Issuer's  board  of
         directors. FIDAC is responsible for, among other duties, performing all
         of the Issuer's day-to-day functions;  determining  investment criteria
         in  conjunction  with  the  Issuer's  board  of  directors;   sourcing,
         analyzing and executing  investments;  asset sales and financings;  and
         performing asset management  duties.  Each of the Issuer's  officers is
         also an employee of FIDAC or one of its affiliates.  In addition, FIDAC
         has an investment committee  consisting of FIDAC's  professionals which
         advises and consults with FIDAC's senior  management  team with respect
         to the Issuer's  investment  policies,  investment  portfolio holdings,
         financing and leveraging strategies and investment guidelines.





ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.

         7.01  Stock  Purchase  Agreement,  dated as of October 29, 2008, by and
               between Annaly and Issuer.

         7.02  Management  Agreement,  dated as of  November  21,  2007,  by and
               between FIDAC and Issuer.

         7.03  Amendment No. 1 to the Management Agreement,  dated as of October
               13, 2008, by and between FIDAC and Issuer.

         7.04  Amendment No. 2 to the Management Agreement,  dated as of October
               19, 2008, by and between FIDAC and Issuer.





                                    SIGNATURE

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

DATED:  November 7, 2008



                                          By:  /s/ Kathryn Fagan
                                              -----------------------------
                                          Name:  Kathryn Fagan
                                          Title: Chief Financial Officer