Two classes of Structured Asset Investment Loan Trust residential mortgage-backed certificates have been downgraded by Fitch Ratings.Class B1 of series 2006-4 was downgraded from BB-plus to BB, and class B2 was downgraded from BB to B-plus. In addition, Fitch affirmed the ratings on nine classes from the SAIL transaction. The rating agency attributed the downgrades to a deterioration in the relationship between credit enhancement and expected losses. The pools consist primarily of fixed- and adjustable-rate, fully amortizing and balloon, first- and second-lien residential mortgage loans.

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