Standard & Poor's Corp. cut its ratings on another $5.19 billion of U.S. collateralized debt obligations Tuesday, reflecting credit deterioration and recent ratings cuts on residential mortgage-backed securities amid continuing housing weakness.

The agency trimmed ratings on 19 tranches from seven cash-flow and hybrid CDOs and removed 13 of them from review for possible downgradings. Of the others, six face a significant likelihood of further rating reductions. S&P also affirmed one rating and removed the security from review for possible downgrading.

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