Stock index futures briefly pared gains on Thursday after a report showed new jobless claims fell less than expected but optimism over Greece's austerity plan was set to extend a three-day rally for stocks.

S&P 500 futures added 3.4 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 32 points, and Nasdaq 100 futures rose 8 points.

(Reporting by Angela Moon)

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