(Corrects dateline to Feb. 23)
By Angela Moon
NEW YORK (Reuters) - Stock index futures rose on Wednesday, a day after Wall Street suffered its worst session since August on geopolitical turmoil in Libya.
The unrest kept U.S. crude futures climbing to a 2-1/2 year peak above $96 a barrel. Markets were concerned the turmoil could spread to other top oil producers in the region and cut more output, weighing on energy stocks.
A senior aide to Muammar Gaddafi's influential son Saif resigned, the latest top official to walk out after the Libyan leader's forces have reportedly killed as many as 1,000 people.
"Investors are definitely eyeing the situation with caution, but the market here is understanding that Libya is not a big oil producer and most of its oil goes to Europe," said Robert Pavlik, chief market strategist at Banyan Partners LLC in New York.
"But if this spreads further from here to a bigger oil producer, that will be a game changer since it will directly impact us here."
U.S. technology shares will be in the spotlight after Hewlett-Packard Co
S&P 500 futures rose 4.8 points and were above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures gained 47 points, and Nasdaq 100 futures added on 11.25 points.
Investors will also watch January existing home sales data, due at 10 a.m. EST. Existing home sales are expected to fall in January to an annualized rate of 5.24 million units from 5.28 million, according to a Reuters survey.
Nasdaq OMX Group Inc
The Federal Reserve's monetary policy should remain accommodative for some time yet, Chicago Federal Reserve President Charles Evans told the Financial Times.
Lowe's Cos Inc
The U.S. Air Force may announce whether Boeing Co
Car rental company Hertz Global Holdings Inc
(Reporting by Angela Moon; editing by Jeffrey Benkoe)