Data out this week confirmed one of the Fed's greatest fears—housing prices are double-dipping.

California Suburbs

The S&P Case-Shiller Index of 20 major metropolitan areas fell for the third straight month in October, taking the index back to its lowest level since April 2010. And while the index is still 4.4 percent above the April 2009 low, the new trend suggests that we may easily test those lows in the months to come.