The National Association of Realtors reported that existing home sales surged last month, up 12.3 percent from an annual rate of 4.7 million in November to 5.28 million in December.

Rising mortgage rates that have spurred some fence-sitters to take action and seasonal factors during what is a slow time of the year are surely involved in the sales gain that ranks as the biggest sales month since the housing bubble burst, excluding months that were unduly influenced by the 2009-2010 homebuyer tax credit.

Distressed sales accounted for 36 percent of all sales, up from 33 percent in November, and the months of supply metric again fell sharply, from 9.5 months to just 8.1 months.

The median sales price was $168,000, down one percent from a year ago, and this is likely to go lower in the months ahead as distressed property sales make up a larger portion of sales during the quiet winter months.