NEW YORK (AP) - A pledge from the Federal Reserve to remain "patient" when deciding when to lift interest rates gave the stock market its biggest gain in more than a year.
Stocks rose from the open on Wednesday, led by gains for the energy sector, as oil prices showed signs of stabilizing after their big slump in recent months. The market's gains were extended after Fed policymakers released a statement following the end of its most recent policy meeting.
A near six-year bull run for the stock market has come against a background of exceptional stimulus from the Fed. At the start of the month investors had worried that signs of strengthening hiring would lead the Fed to bring forward the start of rate increases.
"The Fed is going to be our friend for a very long time," said Burt White, chief investment officer for LPL Financial. "Growth continues to be good and corporate America is healthy. If you mix all that together it translates to rising stock prices."
The Standard & Poor's 500 index rose 40.15 points, or 2.04 percent, to 2,012.89. That was the biggest gain for the index since October 2013
The Dow Jones industrial average rose 288 points, or 1.7 percent, to 17,356.87. The Nasdaq composite climbed 96.48 points, or 2.1 percent, to 4,644.31.
Stock investors have had a wild ride in the final quarter of the year. The market plunged at the start of October on concerns that global growth was slowing. Then it rebounded and surged to record levels at the start of December, before falling sharply last week as the price of oil collapsed, dragging down energy stocks.