Wall Street’s main indexes opened lower on Monday as investors maintained a cautious stance ahead of data, including a report on the U.S. services sector, to gauge the Federal Reserve’s next move at its rate-setting meeting later this month.

The Dow Jones Industrial Average (.DJI) fell 94.1 points, or 0.27%, at the open to 34335.73. The S&P 500 (.SPX) dipped 19.7 points, or 0.48%, at the open to 4052.02​, while the Nasdaq Composite (.IXIC) dropped 80.5 points, or 0.70%, to 11380.991 at the opening bell.