(REUTERS) -- Dow and S&P futures turned negative on Friday after data showed gross domestic product for the fourth quarter was slightly below Wall Street expectations.

S&P 500 futures fell 3.6 points and were blow 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 lost 26points and Nasdaq 100 futures were unchanged.

(Reporting By Chuck Mikolajczak; editing by Jeffrey Benkoe)

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