December's reading, which was released Tuesday, follows a month-over-month drop of roughly 16 percent in November. "You have hit some sort of floor level of demand in housing," says Mike Larson of Weiss Research  Hangover: November's sharp monthly decline in pending home sales was linked to the first-time home buyers tax credit. Buyers needed sales contracts signed by at least the end of October in order to ensure that their transaction would close by the tax credit's original deadline of November 30. This worked to increase the pending homes sales index in October and at the expense of November. Real estate experts were encouraged that the pending home sales index held its ground in December after November's drop. The report "suggests that the hangover effect from the first-time home buyer tax credit is likely to be relatively limited and that sales will continue to recover throughout the spring," says Nomura Securities economist Zach Pandl.

2. Fundamentals: December's pending home sales stability was driven by several key factors. First, home prices have dropped precipitously since the housing bubble popped. Real estate values in 20 major U.S. cities, for example, are down roughly 29 percent from their 2006 peaks, according to the most recent Case Shiller report. More affordable home prices, of course, work to bring more buyers into the market. Meanwhile, 30-year fixed mortgage rates--which fell below 5 percent for the week ending Jan. 28--are sitting near all-time lows. "The big picture story on housing--outside of how the tax credit can influence the monthly numbers--is that houses are cheap again," Larson says. "You are still seeing cheap homes and cheap mortgages combining to make housing affordable." If that's not enough, the first-time home buyer tax credit was extended and expanded in early November to include even current homeowners who sign a sales contract by April 30th and close the transaction by the end of June.