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

The S&P 500 dropped 1.2% and was on track for its worst loss since Aug. 1. The Dow Jones Industrial Average was down 372 points, or 0.8%, after earlier falling as much as 579 points. The Nasdaq composite was 1.7% lower, as of 11:45 a.m. Eastern time.

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