NEW YORK, Sept 16 (Reuters) - U.S. stock index futures trimmed losses on Thursday after initial jobless claims data unexpectedly fell last week.
S&P 500 futures dipped 3.4 points and were 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 were off 20 points, and Nasdaq 100 futures slipped 3.5 points.