Stocks edge up at open, Caterpillar lags

NEW YORK -

Stocks rose at the open after comments from a Federal Reserve official suggested the central bank was not done taking action to stimulate the economy, but a pessimistic outlook from Caterpillar kept the advance in check.

The Dow Jones industrial average <.DJI> gained 28.73 points, or 0.21 percent, to 13,587.65. The Standard & Poor's 500 Index <.SPX> advanced 3.13 points, or 0.21 percent, to 1,460.02. The Nasdaq Composite Index <.IXIC> rose 8.73 points, or 0.28 percent, to 3,169.51.

(Reporting by Chuck Mikolajczak; Editing by Kenneth Barry)