NEW YORK (AP) — A monthslong calm on Wall Street is breaking on Friday, and U.S. stocks are tumbling after President Donald Trump threatened to crank tariffs even higher on China.

The S&P 500 fell 1.5% and was on track for its sharpest loss since Aug. 1. The Dow Jones Industrial Average was down 456 points, or 1%, as of 11:35 a.m. Eastern time, and the Nasdaq composite was 2.2% lower.

See Full Page