A monthslong calm on Wall Street shattered Friday, and U.S. stocks tumbled after President Donald Trump on China.

The S&P 500 sank 2.7% in its worst day since April. The Dow Jones Industrial Average dropped 878 points, or 1.9%, and the Nasdaq composite fell 3.6%.

Stocks had been heading for a slight gain in the morning, until took to his social media platform and said he’s considering “a massive increase of tariffs” on Chinese imports. He’s upset at , which are materials that are critical for the manufacturing of everything from consumer electronics to jet engines.

“We have been contacted by other Countries who are extremely angry at this great Trade hostility, which came out of nowhere,” Trump wrote on Truth Social. He also said “now there seems to be no reason” to meet with China’s le

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