Greenspan's prediction: Prices bottoming next year
"Home prices in the U.S. are likely to start to stabilize or touch bottom sometime in the first half of 2009," he said in an interview. Tracing a jagged curve with his finger on a tabletop to underscore the difficulty in pinpointing the precise trough, he cautioned that even at a bottom, "prices could continue to drift lower through 2009 and beyond."
He's relying on several data sources:
One is the supply of vacant, single-family homes for sale, both newly completed homes and existing homes owned by investors and lenders. He sees that "excess supply" -- roughly 800,000 units above normal -- diminishing soon. The other is a comparison of the current price of houses -- he prefers the quarterly S&P Case Shiller National Home Price Index because it includes both urban and rural areas -- with the government's estimate of what it costs to rent a single-family house.