Fitch Downgrades IndyMac Pass-Thrus

Five classes of IndyMac Residential Asset Securities Trust mortgage pass-through certificates have been downgraded by Fitch Ratings. The downgrades from RAST 2007-A3 were as follows: class B-1, from AA to AA-minus; class B-2, from A to BBB-plus; class B-3, from BBB to BB-minus; class B-4, from BB to C/DR4; and class B-5, from B to C/DR5. The downgrades were attributed to deterioration in the relationship between credit enhancement and loss expectations.