Updated

WASHINGTON -- Home prices are falling in most major U.S. cities, and at least 10 major markets are at their lowest point since the housing bubble burst.

The Standard & Poor's/Case-Shiller 20-city index shows price declines in 19 cities from February to January. The index fell for the seventh straight month.

High unemployment, stricter lending rules and fears that prices will fall further are among the reasons why few people are buying homes. A record number of foreclosures are forcing down home prices in most metro areas, and prices are expected to keep falling through this year.

Detroit was the only market to show a monthly gain, although the Motor City is one of five cities where home prices are now below their January 2000 levels.

Prices in Atlanta, Charlotte, Chicago, Las Vegas, Miami, New York, Phoenix, Portland, Ore., Seattle and Tampa are all at their lowest point since 2006 or 2007, at the height of the housing boom.

The housing sector is struggling even while much of the economy is recovering slowly but steadily. Some of the worst declines in home prices are in cities hit hardest by unemployment and foreclosures.

Foreclosures are expected to rise to 1.2 million this year as many banks revisit thousands of foreclosure cases, spurred into action by federal regulators who have ordered top-to-bottom reviews of how foreclosures were carried out over the past two years.

The Case-Shiller index measures sales of select homes in those cities compared to January 2000. For each of the 20 metro areas it studies, the index provides an updated three-month moving average price. By measuring the sales price of the same homes over time, the index attempts to gauge true market values.