Stock index futures added to losses on Thursday after data showed applications for first-time unemployment insurance rose more than expected in the latest week.

S&P 500 futures fell 7.7 points and were below 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 49 points and Nasdaq 100 futures dropped 5.5 points.

A separate report showed The U.S. trade deficit widened much more than expected in January to $46.3 billion, as surging imports of oil, capital goods and cars overpowered record exports.