Stocks added to gains, driving the Dow up more than 1 percent, in afternoon trading on Tuesday on growing expectations that Greece will avoid a debt default.

The Dow Jones industrial average <.DJI> was up 129.27 points, or 1.07 percent, at 12,209.65. The Standard & Poor's 500 Index <.SPX> was up 18.44 points, or 1.44 percent, at 1,296.80. The Nasdaq Composite Index <.IXIC> was up 55.83 points, or 2.12 percent, at 2,685.49.

(Reporting by Caroline Valetkevitch; Editing by Kenneth Barry)