August US house prices fall 16% year-on-year

House prices in 20 US cities declined in the year ended in August at the fastest pace on record as more properties went into foreclosure before the credit crisis deepened this month.

The S&P/Case-Shiller home-price index dropped 16.6 percent in August from a year earlier, as forecast, after a 16.3 percent decline in July. The gauge has fallen every month since January 2007, and year-over-year records began in 2001.

The decrease in property values, which helped boost sales last month to the highest level of the year, will probably intensify in coming months as the latest tightening of credit markets threatens to dry up mortgage financing. Prolonged price declines may push even more houses into foreclosure, weakening consumer spending and the economy.