A home for sale earlier this month in San Francisco. Justin Sullivan/Getty Images hide caption
S&P/Case-Shiller
Housing has been one of the economy's bright spots. Steven Senne/AP hide caption
A "For Sale" sign outside a home in the Wicker Park neighborhood of Chicago on Monday. Scott Olson/Getty Images hide caption
This home was under contract last month in Chicago. Scott Olson/Getty Images hide caption
Home prices increased during May in the S&P/Case-Shiller 20 City Home Price Index. Jae C. Hong/ASSOCIATED PRESS hide caption
This single family home was for sale last week in Encinitas, Calif. Mike Blake/Reuters /Landov hide caption
A newly built home in San Diego. Mike Blake/Reuters /Landov hide caption
A sign of the times in Boca Raton, Fla. (November 2012 file photo.) Joe Raedle/Getty Images hide caption
A sold sign at a housing development in Boca Raton, Fla., earlier this month. Joe Raedle/Getty Images hide caption
A home for sale in Los Angeles last month. Kevork Djansezian/Getty Images hide caption
Renzo Salazar, from Real Signs of Ace Post Holding Inc., placed a bank owned sign on top of a for sale sign outside a foreclosed home in Miami last month. Joe Raedle/Getty Images hide caption
One reason prices have been falling: A glut of foreclosed homes. Joe Raedle/Getty Images hide caption
A "sale pending" sign outside a home in Bath, Maine, in July. Pat Wellenbach/AP hide caption
June 9, 2011 file photo: a "sold" sign in Seattle. Elaine Thompson/AP hide caption
When the housing bubble burst, many homes went into foreclosure — further depressing prices. Don Ryan/AP hide caption
Signs of the times: in Miami on Feb. 11. Joe Raedle/Getty Images hide caption