Home prices in 20 major metropolitan areas fell 1.0 percent in August from July, according to the Standard & Poor's/Case-Shiller Home Price Indices.
S&P said in a statement its composite index of 10 metropolitan areas declined 1.1 percent in August from July for a 17.7 percent year-over-year drop, also a record.
"The downturn in residential real estate prices continued, with very few bright spots in the data," David M. Blitzer, Chairman of the Index Committee at Standard & Poor's, said in the statement.
A huge supply of unsold homes, tighter lending standards and record foreclosures have pushed down home prices, deflating a bubble from the early part of this decade.
For the fifth straight month, prices fell in every region on an annual basis, he said.
Both the 10-City Composite and 20-City Composite Home Price Indices have fallen from a year earlier for 20 consecutive months. In regions, annual returns worsened from last month's report,