Posted by Marc Rosenberg

Efforts by major banks and Wall Street firms to unload bad U.S. housing loans are speeding up a shakeout in the subprime mortgage industry.

As more Americans fall behind on mortgage payments, Merrill Lynch & Co., J.P. Morgan Chase & Co., HSBC Holdings PLC and others are trying to force mortgage originators to buy back the same high-risk, high-return loans that the big banks eagerly bought in 2005 and 2006.

Merrill demanded in December that ResMae Mortgage Corp. — which in 2006 sold it $3.5 billion in subprime mortgage loans, or loans to borrowers with poor credit records — buy back $308 million of loans whose borrowers had defaulted. In a filing this week for bankruptcy law protection, ResMae said those demands "crippled" its operations. The Brea, Calif., company said that repurchase requests were "severe and unexpected."

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