S&P Downgrades 158 Alt-A Classes

Standard & Poor's latest assessment of first-lien alternative-A credit residential mortgage-backed securities issued between October 2005 and December 2006 leaves 158 classes downgraded and affirms/removes 82 Alt-A classes from CreditWatch negative.The rating agency said the move resolves 237 outstanding CreditWatch actions in this portion of the market and also includes downgrades on three classes from Bear Stearns Alt A Trust 2005-10 that were not previously on CreditWatch. S&P can be found on the Web at http://www.standardandpoors.com.