9. Cleveland: Home prices in Cleveland increased 13 percent from 2002 to 2006 but then fell nearly 16 percent through the third quarter of 2009. "There was a little bit of overinvestment in housing, and the economy started weakening," says Celia Chen of Moody's Economy.com. "[Cleveland] entered recession before the rest of the U.S., and I think weak economic conditions have pulled down home prices." Exposure to subprime lending has also played a role in the real estate market's decline. Roughly 32 percent of single-family home mortgages were underwater as of the fourth quarter of last year, according to Zillow.
10. Grand Rapids, Mich.: Real estate values in Grand Rapids, Mich., increased 15 percent from 2002 to 2005 and then fell about 13 percent through the third quarter of last year. As of the fourth quarter of 2009, roughly 29 percent of single-family home mortgages were underwater, according to Zillow. The weakness in the housing market is linked to the area's deteriorating economy, Chen says.