The three major stock indexes advanced 1 percent on Tuesday on increasing optimism that Greece's parliament would approve tough austerity measures in its efforts to avoid a debt default.

The Dow Jones industrial average <.DJI> was up 113.42 points, or 0.94 percent, at 12,156.98. The Standard & Poor's 500 Index <.SPX> was up 11.30 points, or 0.88 percent, at 1,291.40. The Nasdaq Composite Index <.IXIC> was up 28.40 points, or 1.06 percent, at 2,716.68.

(Reporting by Angela Moon)