2008-05-07 23:48:08 -

- Fitch Ratings has taken rating action on the following IndyMac Residential Asset Securitization Trust (RAST) mortgage pass-through certificates. Unless stated otherwise, any bonds that were previously placed on Rating Watch Negative are removed.

IndyMac MBS RAST, series 2003-A7

--Class A affirmed at 'AAA'.

The collateral on the aforementioned transactions consists of 30-year fixed-rated mortgages extended to

Alt-A borrowers. As of the March 2008 remittance date, the pool has experienced 0.04% of loss (as a percentage of original balance). The deal has 3.07% in 90+ delinquency (including loans in bankruptcy, foreclosure and REO) and the pool factor is approximately 36%. IndyMac Bank FSB (not rated by Fitch) is the master servicer for the deal.

Class A-8 has a financial guaranty provided by MBIA. For more information, please refer to 'Fitch Moves to Underlying Ratings for MBIA-Insured Bonds' dated Apr. 4, 2008, available on the Fitch Ratings web site at www.fitchratings.com.

Further information regarding current delinquency, loss, and credit enhancement statistics is also available at www.fitchratings.com.

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
Tara Sweeney, +1-212-908-0347
Michele Patterson, +1-212-908-0779
Sandro Scenga, +1-212-908-0278 (Media Relations)