Stock index futures edged lower on Thursday after the Nasdaq posted its biggest gain of the year in the prior session and as investors looked ahead to jobless claims data, a barometer of the health of the labor market.

S&P 500 futures fell 1.5 points and were below fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration of the contract. Dow Jones industrial average futures fell 9 points, and Nasdaq 100 futures fell 6 points.

(Reporting by Ed Krudy; editing by W Simon)