Stock index futures held onto solid gains on Thursday after data showed initial claims for unemployment benefits fell as expected and core consumer prices rose slightly above forecasts.

S&P 500 futures were up 14.8 points and were 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 100 points, and Nasdaq 100 futures gained 20 points.

(Reporting by Chuck Mikolajczak)