Lehman MBS Class Downgraded

Class B4 of Lehman Mortgage Trust series 2006-1 has been downgraded from Baa3 to Ba2 by Moody's Investors Service, and class M of series 2006-3 has been placed under review for possible downgrade.The negative rating actions were based on higher-than-expected rates of delinquency, foreclosure, and real estate owned in the underlying collateral relative to credit enhancement levels. The collateral consists primarily of first-lien, fixed-rate alternative-A mortgage loans.