The number of foreclosed homes owned by lenders continues to rise despite signs that they are increasingly willing to slash prices to sell those properties.

Lenders and investors in mortgages owned about 660,000 foreclosed homes in April, up from 493,000 in January and 231,000 in January 2007, according to First American CoreLogic, a research firm based in Santa Ana, Calif., that collects data from lenders and county clerks. The April total works out to about one in seven previously occupied homes available for sale nationwide.

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