Stocks were lower after a Friday selloff pushed the major averages into the red for the week, with all three major averages capping its second loss in the past three weeks. President Trump threatened China on social media with 100% additional tariffs, including new export controls, after Beijing imposed sweeping curbs on rare-earth exports and new docking fees on U.S. cargo ships. Investor sentiment was also negatively impacted when the New York Fed noted that consumers raised their one-year inflation expectations to 3.4% from 3.2%.