Stock index futures added to losses on Wednesday after a private employment report showed U.S. firms cut more jobs than expected in August.

U.S. private employers cut 298,000 jobs in August, fewer than a revised 360,000 jobs lost in July, but more than the 250,000 mean forecast in a Reuters poll, the ADP and Macroeconomic Advisers said its National Employment Report.

S&P 500 futures fell 3.2 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 down 27 points, and Nasdaq 100 futures dropped 6.00 points.

(Reporting by Edward Krudy; Editing by Padraic Cassidy)

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