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The Dow Jones Industrial Average ticked up 0.53 points (0.00 percent) to 11,614.06 in the first five minutes of trading.
The broader S&P 500 slipped 0.71 points (0.06 percent) to 1,218.18, while the tech-heavy Nasdaq Composite edged up 1.65 points (0.06 percent) to 2,581.11.
Traders were waiting to see whether US industry contracted amid broader economic jitters in August, with the Institute for Supply Management's monthly manufacturing survey to be released at 1400 GMT.
Copyright AFP (Agence France-Presse), 2011