"In the first quarter, home prices nationwide rose an additional 7.3 percent, according to a joint study by the financial services firm National City Corp. and the research firm Global Insight. As a result, there are now 71 metropolitan areas–representing nearly 40 percent of all single-family homes–that can be classified as "extremely overvalued," according to the study. By comparison, only 64 metro regions were considered frothy at the end of last year and only 1 percent were classified as such in the first quarter of 2004."

The US News and World Report article that cited the new study also points out that: "the price decline after a housing bubble could take years to run its course, on average, 3.5 years."