Standard & Poor's Corp. cut its ratings Friday on an additional $4.33 billion of securities backed by U.S. subprime mortgage loans issued in 2005 and 2006.

The ratings agency has been cutting its grades on billions of dollars of residential mortgage-backed deals in recent weeks after boosting its expectation of loan losses as delinquencies keep climbing and home prices keep falling.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.