Home prices continue to tumble, and some economists expect the pain may not end until 2010.

The latest S&P Case-Shiller data, released Tuesday, showed home prices in the 10 largest U.S. cities plunged 16.9% in May from a year earlier. None of the cities saw price gains.

The debate continues to rage about when home prices will bottom. It seems like the stock market won’t be set for a sustained recovery until investors get comfortable with this issue.

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