Stock index futures trimmed gains on Wednesday after data showed demand for long-lasting manufactured goods dropped by the most in three years in March.

S&P 500 futures rose 7.7 points and were above 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 added 26 points, and Nasdaq 100 futures climbed 52.25 points.

(Reporting By Chuck Mikolajczak; editing by Jeffrey Benkoe)