U.S. investors were bracing for a choppy day Monday.

With little on the economic or corporate docket, futures were barely moving, a sign that investors may stay on the sidelines ahead of Tuesday's Fed meeting.

The Dow Jones industrial average (INDU), S&P 500 (SPX) and Nasdaq (COMP) futures were little changed ahead of the opening bell. Stock futures indicate the possible direction of the markets when they open at 9:30 a.m. ET.