U.S. stocks climbed on Wednesday, lifting the S&P 500 to a record finish, after the Federal Reserve said the economy is rebounding and that interest rates would stay low for some time.
"We are inching from unprecedented accommodation to policy tightening, even though it's not imminent," said Anastasia Amoroso, global market strategist at J.P. Morgan Funds.
The Fed alluded to a slightly faster pace of interest rate increases next year, while suggesting benchmark borrowing costs in the longer term would be lower than the Fed has indicated before.
Fed Chair Janet Yellen attempted to "introduce a degree of uncertainty into fixed income, she sent a message to the market that we are in a pricing period of future rate increases. If the Fed raises short-term rates because there is more rapid growth, that is positive for cyclical parts of the stock market," said Amoroso.
Read MoreFed tapers another $10 billion
FedEx jumped after the shipper posted fiscal fourth-quarter earnings that beat estimates; Adobe Systems surged after reporting quarterly revenue above forecasts and Cisco Systems gained after Morgan Stanley advised purchasing shares of the networking-equipment manufacturer. ConAgra Foods fell sharply after the maker of Hunt's tomato ketchup and Slim Jim beef jerky estimated an adjusted quarterly profit below its forecast. Amazon.com rose after the online retailer's introduced its first smartphone at an event Wednesday afternoon.
"The transports have been doing very well this year, which is indicative of people thinking the economy is improving; it's an early indicator-type stock with the moving of packages around the world," said Robert Pavlik, chief market strategist at Banyan Partners of the results from FedEx, which also have shares of competitor United Parcel Service rising.
The Federal Open Market Committee cut its monthly asset purchases by another $10 billion to $35 billion, as expected.
Fed Chairman Janet Yellen told a news conference that inflation was expected to move gradually back to the central bank's 2 percent target.
"We were in the minority in expecting a hawkish shift in rate expectations but that's exactly what happened; median expectations for next year and 2016 ticked up but providing some support, longer term rates have come down to 2.75 percent from 4.00 percent," noted Dan Greenhaus, chief strategist at BTIG.
Read MoreBeware this move from the Fed
The rose to an all-time intraday high of 1,957.74, and closed at a record 1,956.98, up 14.99 points, or 0.8 percent.
Utilities paced sector gains and the Dow 15 Utility Average reached an all-time high.
The Nasdaq rose 25.60 points, or 0.6 percent, to 4,362.84.
The CBOE Volatility Index, one measure of investor uncertainty, dropped to a seven-year low.
For every stock falling, more than two gained on the New York Stock Exchange, where 628 million shares traded. Composite volume neared 3.1 billion.
Wednesday's economic reports included a sharp drop in mortgage applications last week, while the Commerce Department said the U.S. widened in the first quarter.
"The mortgage index, that's all over the place, and the current account deficit, that's always all over the place as well, but always negative," said Pavlik in dismissing the significance of either report on stock-market moves on Wednesday.
U.S. stocks have risen in recent days as M&A and upbeat data on manufacturing offset worries about violence in Iraq and rising energy costs.
On Wednesday, Reuters reported the head of Iraq's state-run South Oil Company Dhiya Jaffar as saying ExxonMobil had carried out a "major evacuation" of staff and BP had evacuated 20 percent of its workers from the country.
—By CNBC's Kate Gibson
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Earnings: Oracle, Blackberry
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10:00 a.m.: Philadelphia Fed survey
10:00 a.m.: Leading indicators
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