EXHIBIT 31.2

Exhibit 31.2
CERTIFICATIONS
I, A. Alexandra Denahan, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Chimera
Investment Corporation;

2. Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the
circumstances under which such statements were made, not
misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other
financial information included in this report, fairly present
in all material respects the financial condition, results of
operations and cash flows of the registrant as of, and for,
the periods presented in this report;

4. The registrant's other certifying officer and I are
responsible for establishing and maintaining disclosure
controls and procedures (as defined in Exchange Act Rules
13a-15(e) and 15d-15(e)) and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(f) and
15d-15(f) for the registrant and have:

a. Designed such disclosure controls and procedures or
caused such disclosure controls and procedures to be
designed under our supervision, to ensure that material
information relating to the registrant, including its
consolidated subsidiaries, is made known to us by
others within those entities, particularly during the
period in which this report is being prepared;

b. Designed such internal control over financial
reporting, or caused such internal control over
financial reporting to be designed under our
supervision, to provide reasonable assurance regarding
the reliability of financial reporting and the
preparation of financial statements for external
purposes in accordance with generally accepted
accounting principles;

c. Evaluated the effectiveness of the registrant's
disclosure controls and procedures and presented in
this report our conclusions about the effectiveness of
the disclosure controls and procedures, as of the end
of the period covered by this report based on such
evaluation; and

d. Disclosed in this report any change in the registrant's
internal control over financial reporting that occurred
during the registrant's most recent fiscal quarter (the
registrant's fourth fiscal quarter in the case of an
annual report) that has materially affected, or is
reasonably likely to materially affect, the
registrant's internal control over financial reporting;
and

5. The registrant's other certifying officer and I have
disclosed, based on our most recent evaluation of internal
control over financial reporting, to the registrant's auditors
and the audit committee of the registrant's board of directors
(or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in
the design or operation of internal controls over
financial reporting which are reasonably likely to
adversely affect the registrant's ability to record,
process, summarize and report financial information;
and

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b. Any fraud, whether or not material, that involves
management or other employees who have a significant
role in the registrant's internal control over
financial reporting.

Date: November 10, 2008
/s/ A. Alexandra Denahan
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A. Alexandra Denahan
Chief Financial Officer (Principal Financial Officer)

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