Stocks added gains on Tuesday after data showed existing home sales rose more than expected in November as prices continued to fall and buyers took advantage of a popular tax credit.

The Dow Jones industrial average <.DJI> gained 45.35 points, or 0.44 percent, to 10,459.49. The Standard & Poor's 500 Index <.SPX> added 4.28 points, or 0.38 percent, to 1,118.33. The Nasdaq Composite Index <.IXIC> put on 12.41 points, or 0.55 percent, to 2,250.07.

(Reporting by Leah Schnurr)