Investors on Wall Street appeared particularly cautious ahead of the latest minutes from the Federal Open Market Committee meeting, with Asian and European markets offering little in terms of directional support.
Soon after the open, the Dow was up 0.01% at 22,832.42, the S&P 500 was 0.06% lower at 2,549.18 and the Nasdaq was down by 0.13% at 6,578.81.
European stocks were mixed, with the FTSE 100 declining 0.09%, the DAX up by a similar amount and the CAC 40 falling 0.15%.
WTI crude oil was up 0.12% at $50.98 and Brent was up 0.05% at $56.64 per barrel.
Gold was off by 0.06% at $1,293 per oz, silver was down 0.1%, while copper advanced 0.8%.
Data from JOLTS regarding job openings is out later today, while the FOMC minutes are due to be released this evening.