NEW YORK: US stocks added to gains in afternoon trading on Tuesday, pushing the Nasdaq up more than 1 percent, as investors were optimistic about the outlook for the Federal Reserve's economic stimulus policies.

The Dow Jones industrial average was up 153.55 points, or 1.01 percent, at 15,333.40. The Standard & Poor's 500 Index was up 14.37 points, or 0.88 percent, at 1,653.41. The Nasdaq Composite Index was up 35.12 points, or 1.02 percent, at 3,487.25.