Exhibit 32.2

                         CHIMERA INVESTMENT CORPORATION
                           1211 AVENUE OF THE AMERICAS
                                   SUITE 2902
                            NEW YORK, NEW YORK 10036


                                  CERTIFICATION


                         PURSUANT TO SECTION 906 OF THE

                     SARBANES-OXLEY ACT OF 2002, 10 U.S.C. SECTION 1350

      In connection with the annual report on Form 10-K of Chimera Investment
Corporation (the "Company") for the period ended December 31, 2007 to be filed,
I, A. Alexandra Denahan, Chief Financial Officer of the Company, certify,
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section
1350, that:


1.   The Report fully complies with the requirements of Section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

2.   The information contained in the Report fairly presents, in all material
     respects, the financial condition and results of operations of the Company
     at the dates of, and for the periods covered by, the Report.

It is not intended that this statement be deemed to be filed for purposes of the
Securities Exchange Act of 1934.


                            /s/ A. Alexandra Denahan
                            ------------------------
                            A. Alexandra Denahan
                            Chief Financial Officer
                            February 29, 2008