Stock index futures rose on Thursday, adding to gains from the previous session when the Federal Reserve boosted equities by saying it was likely to keep interest rates near zero until at least late 2014.

S&P 500 futures rose 3.7 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 were up 17 points, and Nasdaq futures rose 4.75 points.

(Reporting By Edward Krudy; Editing by W Simon)