Merrill MBS Classes Downgraded

Three classes of Merrill Lynch Mortgage Investors Inc.'s mortgage loan asset-backed certificates, series 2005-SD1, have been downgraded by Fitch Ratings.The downgrades were as follows: class M-2, from A to BBB-plus; class B-1, from BBB to BB; and class B-2, from BB to B-minus/DR2. The rating agency also affirmed the ratings on two other classes in the deal. The downgrades were attributed to a deterioration in the relationship between credit enhancement and expected losses. The transaction consists primarily of subprime mortgage loans secured by first or second liens.