NEW YORK (Reuters) - Stock index futures briefly turned higher on Friday following a government report that showed U.S. employers slashed payrolls in December but by less than expected.
* S&P 500 futures rose 4.20 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 climbed 6.50 points while Nasdaq 100 futures fell 3.25 points.
(Reporting by Ellis Mnyandu; Editing by James Dalgleish)