Four classes of pass-through certificates from a Wells Fargo Alternative Loan Trust securitization have been downgraded by Fitch Ratings. The downgrades from WFALT 2007-PA1 were as follows: class B-2, from A to A-minus; class B-3, from BBB to BB-plus; class B-4, from BB to B; and class B-5, from B to C/DR5. Fitch also affirmed the ratings on two other classes in the deal. The downgrades were attributed to deterioration in the relationship between credit enhancement and loss expectations. The collateral consists of fixed-rate, conventional first-mortgage loans.
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