Class A of SARM Net Interest Margin Notes, series 2005-5, has been placed under review for possible downgrade by Moody's Investors Service.Moody's said the rating action was based on the performance of the Structured Adjustable Rate Mortgage Loan Trust 2005-5. "The transaction has experienced high prepayments, which has adversely affected the NIM by reducing the dollar amount of payments made to the A-IO2 class, which serves as collateral in this NIM transaction," the rating agency said. Moody's noted that NIM deals typically represent the securitization of excess spread, prepayment penalties, and cap payments generated by the underlying residential mortgage-backed securities.

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