Stock index futures turned negative on Friday after data from the Labor Department showed nonfarm payrolls rose by 39,000 in November, far less than forecast.

S&P 500 futures fell 6.1 points and were below 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 lost 40 points, and Nasdaq 100 futures shed 13 points.

(Reporting by Chuck Mikolajczak; editing by Jeffrey Benkoe)