S&P 500 index futures extended gains slightly on Friday following results from General Electric Co .

S&P 500 futures were up 3.3 points and 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 rose 16 points and Nasdaq 100 futures gained 4.5 points.

(Reporting by Angela Moon, Editing by Jeffrey Benkoe)