Twenty mezzanine and subordinate certificates from 10 home equity loan transactions issued by Structured Asset Securities Corp.'s Amortizing Residential Collateral Trusts in 2001 and 2002 have been downgraded by Moody's Investors Service.In addition, Moody's confirmed the ratings on four certificates from four SASCO transactions. The downgrades were based on the weaker-than-expected performance of the mortgage pools and the resulting erosion of credit support, the rating agency said. Overcollateralization amounts in most of the deals are below their targets, and pipeline losses could cause further depletion of the overcollateralization and put pressure on the most subordinate tranches, Moody's said. The rating agency can be found online at http://www.moodys.com.

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