House Prices Drop 15.8%

NEW YORK (CNNMoney.com) -- May home prices dropped a record 15.8% from a year ago, according to the S&P/Case-Shiller Home Price Index of 20 cities. It was the 22nd consecutive month of decline recorded by the index. Prices fell 0.9% from April to May.

Each of the 20 metro areas covered by the index posted annual declines; nine posted record lows and 10 cities recorded double-digit drops.

The Case-Shiller 10-city Index posted a year over year decline of 16.9%, and a 1% month over month dip. Both the 10-City Composite Index and the 20-City Composite Index are reporting record annual declines.

"Since August 2006, there has not been one month where we have seen overall price increases, as measured by the two Composites," said David Blitzer, Chairman of the Index Committee at Standard & Poor's.

Case-Shiller has been tracking the 20-city index for 19 years, while the 10-city index is 21 years old. The current price decline streak has been unprecedented in both length and depth. Starting in April 1990, the 10-city index streaked down for 10 consecutive months. But that total loss was just 6.5%.

Since the 10-city index peaked in July 2006, it has plunged 19.8%. The 20-city is down 18.4%.

The 20-city index's Sun Belt cities, which recorded the biggest price gains during the boom, have led the charge down. Las Vegas prices have plummeted 28.4% during the past 12 months; Miami prices fell 28.3%; and Phoenix homes lost 26.5% of their value.

Midwest metro areas, which have endured tough economic times for years, are also feeling the pain. Detroit prices are off 17.4% for the 12 months, and Cleveland is down 8%.

Northeast cities like Boston, down 6.2% for the 12 months, and New York, off 7.9%, have been less volatile than the Sun Belt.

The smallest year-over-year declines were recorded by Charlotte, N.C. (down 0.2%), Dallas (down 3.1%), and Denver (down 4.8%).

Optimistic observers might point out that price declines appear to be slowing. The 10-city index's 1% month to month dip in May was less than April's, when it registered a 1.5% decline, while the 20-city index fell just 0.9% in May after dropping 1.3% in April.