IndyMac MBS Classes Downgraded

Four classes of IndyMac MBS RAST 2006-A10 mortgage-backed securities have been downgraded by Fitch Ratings.The downgrades were as follows: class B-1, from AA to AA-minus; class B-2, from A to BBB; class B-3, from BBB to B; and class B-4, from BB to C/DR5. Fitch also affirmed the rating on one other class in the deal. The downgrades were attributed to a deterioration in the relationship between credit enhancement and loss expectations. The collateral for the deal consists of fixed-rate, first-lien residential mortgages.