Stock index futures fell on Tuesday after data showed retail sales rose less than expected in January from December as consumers cut back on car purchases and shopped less online.

S&P 500 futures were down 2.5 points and below 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 fell 3 points and Nasdaq 100 futures lost 4.25 points.

(Reporting By Angela Moon)