Prices in 20 cities fall for 21st month in a row. One sign of hope: Pace of decline eased in many areas.

NEW YORK (CNNMoney.com) -- U.S. home prices posted record declines in April, extending a painful losing streak for U.S. home prices.

"In the bubble markets, we continue to see very rapid rates of price declines," said Baker. "If anything, it may be accelerating."