U.S. stock index futures were little changed on Wednesday after a report showed U.S. private sector added more jobs than expected in January.

The ADP report showed U.S. private employers added 187,000 jobs, compared with a revised gain of 247,000 jobs in December. Economists expected a rise of 145,000.

S&P 500 futures were flat and slightly 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 added 5 points, and Nasdaq 100 futures fell 3 points.

The Dow and the S&P advanced to their highest close in about 2-1/2 years on Tuesday.

(Reporting by Angela Moon; editing by Jeffrey Benkoe)