AI stock sell-off sends the S&P 500 down 4.4% in worst day since Trump's tariff announcement

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AI stocks worldwide felt pressure as worries rise about possible moratoriums on data centres following Democratic victories in the U.S. midterm elections.

The S&P 500 saw its worst session since Trump shook markets with his 'Liberation Day' tariffs

The Associated Press

· Posted: Nov 05, 2026 4:31 PM EST | Last Updated: 8 minutes ago

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A Wall St. sign stands above Wall Street in the financial district of New York, Wednesday, January 10, 2007.

A brutal sell-off swept through Wall Street, led by stocks tied to the buildout of AI data centres.

The S&P 500 fell 4.4 per cent Thursday for its worst drop since U.S. President Donald Trump shook markets worldwide in April 2025 with his "Liberation Day" tariffs.

The wipeout more than erased the market's gain from the day before, which was its best in three months.

The Dow Jones Industrial Average dropped more than 1,800 points, and the Nasdaq Composite tumbled 5.5 per cent.

In Toronto, the S&P/TSX Composite index slipped 2.03 per cent, led by energy, mining and information technology stocks.

AI stocks worldwide felt pressure as worries rise about possible moratoriums on data centres following Democratic victories in the U.S. midterm elections.

-With files from CBC News

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