Stock index futures turned negative on Friday after data showed an unexpected decline in non-farm payrolls in December.

U.S. employers cut 85,000 jobs last month, compared with a revised gain of 4,000 jobs in November, with the unemployment steady at 10 percent. Economists forecast non-farm payrolls would be unchanged last month.

S&P 500 futures fell 5.4 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 dropped 25 points and Nasdaq 100 futures lost 12.25 points.

(Reporting by Rodrigo Campos; editing by Jeffrey Benkoe)

Unemployment