Stock index futures added to gains on Thursday after new claims for unemployment benefits climbed less than expected last week and optimism persisted that Europe was on track to fix its debt crisis.

S&P 500 futures rose 7.8 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 added 79 points and Nasdaq 100 futures put on 17.25 points.

(Editing by Jeffrey Benkoe)