Stock futures fell Monday following the U.S. government’s announcement that tariffs are set to go into effect Aug. 1. The Dow Jones Industrial Average futures slid by 53 points, or 0.1%, while the S&P 500 and Nasdaq 100 futures dipped 0.4% and 0.5%, respectively.

What level of tariffs will the U.S. impose on imports and when? Stock futures were falling early Monday as markets were roiled by threats of new levies but also confusion over the deadline for the proposed duties.