US stocks extended gains on Tuesday, with the S&P 500 Index up more than 1 percent to a two-month high as "fiscal cliff" negotiations appeared to advance in Congress. The Dow Jones industrial average rose 122.32 points, or 0.92 percent, to 13,357.71. The S&P 500 gained 16.58 points, or 1.16 percent, to 1,446.94. The Nasdaq Composite added 43.50 points, or 1.44 percent, to 3,054.10.

Copyright Reuters, 2012