Correction: Fitch Rates $868MM Credit Suisse First Boston Mortgage Securities CSMC 2009-5R

NEW YORK--(Business Wire)--
(This corrects a release issued on June 29, 2009 to update the amount for bond
4-A-3 in the last paragraph of the ratings list.)

Credit Suisse First Boston Mortgage Securities CSMC 2009-5R is rated by Fitch
Ratings as follows:

-- $364,148,000 exchangeable class 1-A-1 'AAA'; Outlook Stable;

-- $299,886,000 class 1-A-3 'AAA'; Outlook Stable;

-- $21,421,000 class 1-A-4 'AAA'; Outlook Stable;

-- $10,710,000 class 1-A-5 'AAA'; Outlook Stable;

-- $10,710,000 class 1-A-6 'AAA'; Outlook Stable;

-- $21,421,000 class 1-A-7 'AAA'; Outlook Stable;

-- $342,727,000 exchangeable class 1-A-8 'AAA'; Outlook Stable;

-- $332,017,000 exchangeable class 1-A-9 'AAA'; Outlook Stable;

-- $321,307,000 exchangeable class 1-A-10 'AAA'; Outlook Stable;

-- $50 residual class 1-R 'AAA'; Outlook Stable;

-- $212,902,000 exchangeable class 2-A-1 'AAA'; Outlook Stable;

-- $75,000,000 class 2-A-2 'AAA'; Outlook Stable;

-- $186,290,000 class 2-A-5 'AAA'; Outlook Stable;

-- $13,306,000 class 2-A-6 'AAA'; Outlook Stable;

-- $6,653,000 class 2-A-7 'AAA'; Outlook Stable;

-- $6,653,000 class 2-A-8 'AAA'; Outlook Stable;

-- $206,249,000 exchangeable class 2-A-9 'AAA'; Outlook Stable;

-- $199,596,000 exchangeable class 2-A-10 'AAA'; Outlook Stable;

-- $60,346,000 class 2-A-14 'AAA'; Outlook Stable;

-- $4,310,000 class 2-A-15 'AAA'; Outlook Stable;

-- $2,155,000 class 2-A-16 'AAA'; Outlook Stable;

-- $2,155,000 class 2-A-17 'AAA'; Outlook Stable;

-- $4,310,000 class 2-A-18 'AAA'; Outlook Stable;

-- $1,724,000 class 2-A-19 'AAA'; Outlook Stable;

-- $73,276,000 exchangeable class 2-A-20 'AAA'; Outlook Stable;

-- $68,966,000 exchangeable class 2-A-21 'AAA'; Outlook Stable;

-- $66,811,000 exchangeable class 2-A-22 'AAA'; Outlook Stable;

-- $64,656,000 exchangeable class 2-A-23 'AAA'; Outlook Stable;

-- $281,868,000 exchangeable class 2-A-29 'AAA'; Outlook Stable;

-- $273,060,000 exchangeable class 2-A-31 'AAA'; Outlook Stable;

-- $264,252,000 exchangeable class 2-A-33 'AAA'; Outlook Stable;

-- $246,636,000 exchangeable class 2-A-35 'AAA'; Outlook Stable;

-- $50 residual class 2-R 'AAA'; Outlook Stable;

-- $35,000,000 exchangeable class 3-A-1 'AAA'; Outlook Stable;

-- $30,625,000 class 3-A-3 'AAA'; Outlook Stable;

-- $2,187,000 class 3-A-4 'AAA'; Outlook Stable;

-- $1,094,000 class 3-A-5 'AAA'; Outlook Stable;

-- $1,094,000 class 3-A-6 'AAA'; Outlook Stable;

-- $33,906,000 exchangeable class 3-A-7 'AAA'; Outlook Stable;

-- $32,812,000 exchangeable class 3-A-8 'AAA'; Outlook Stable;

-- $50 residual class 3-R 'AAA'; Outlook Stable;

-- $27,614,000 class 4-A-1 'AAA'; Outlook Stable;

-- $55,058,000 class 4-A-3 'AAA'; Outlook Stable;

-- $50 residual class 4-R 'AAA'; Outlook Stable.

This transaction contains certain classes designated as Exchangeable
certificates and others as Exchangeable REMIC certificates. The Exchangeable
certificates are exchangeable for certain classes of Exchangeable REMIC
certificates: The Classes 1-A-2, 1-A-3, 1-A-4, 1-A-5, 1-A-6, 1-A-7, 2-A-3,
2-A-4, 2-A-5, 2-A-6, 2-A-7, 2-A-8, 2-A-14, 2-A-15, 2-A-16, 2-A-17, 2-A-18,
2-A-19, 3-A-2, 3-A-3, 3-A-4, 3-A-5, 3-A-6, 4-A-2, 4-A-3 and 4-A-4. The 1-A-2,
1-A-11, 1-A-12, 1-A-13, 1-A-14, 2-A-3, 2-A-4, 2-A-11, 2-A12, 2-A-13, 2-A-24,
2-A-25, 2-A-26, 2-A-27, 2-A-28, 2-A-30, 2-A-32, 2-A-34, 2-A-36, 3-A-2, 3-A-9,
3-A-10, 3-A-11, 4-A-2, 4-A-4, 4-A-5 and 4-A-6 Classes are not rated by Fitch.

This transaction consists of 4 groups. Group 1 is a resecuritization of 100%
interest in the Thornburg Mortgage Securities Trust 2006-3, Class A-3. Group 2
is a resecuritization of 100% interest in the Thornburg Mortgage Securities
Trust 2006-3, Class A-2. Groups 3 and 4 are each resecuritizations of 15.68% and
40.56% interest, respectively, in the Thornburg Mortgage Securities Trust
2006-3, Class A-1. As resecuritizations, the certificates will receive their
cash-flows from the underlying classes of certificates. The underlying
certificates represent beneficial ownership interest in adjustable-rate,
conventional, first lien residential mortgage loans, substantially all of which
have original terms to stated maturity of 30 years.

Fitch's rating definitions and the terms of use of such ratings are available on
the agency's public site, www.fitchratings.com. Published ratings, criteria and
methodologies are available from this site, at all times. Fitch's code of
conduct, confidentiality, conflicts of interest, affiliate firewall, compliance
and other relevant policies and procedures are also available from the 'Code of
Conduct' section of this site.

Fitch Ratings, New York
Nicole Antompietri, +1-212-908-9134
Wen Hsu, +1-212-908-0633
Sandro Scenga, +1-212-908-0278 (Media Relations)
sandro.scenga@fitchratings.com

Copyright Business Wire 2009