Six metro areas saw their home prices rebound in 2009, according to the Standard & Poor's/Case-Shiller Home Price Indices. In other areas, the housing market continued to suffer, but the rate of decline slowed down. The biggest winner was San Francisco, where house prices gained 4.8% last year. Other cities that saw an increase include Dallas, San Diego, Denver, Boston and Washington, D.C. Despite the positive data, Patrick Newport, an economist at IHS Global Insight, said he expects prices to head back down after a homebuyers' tax credit expires and foreclosures accelerate.