Stock index futures cut gains on Wednesday after a Greek ruling party deputy voted against a critical austerity package.

Futures still pointed to a third day of gains, though they were off session highs. Equities had been positive on growing bets the package would pass.

S&P 500 futures rose 7.6 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 44 points and Nasdaq 100 futures rose 5.75 points.

(Reporting by Ryan Vlastelica)