US stocks today: Nasdaq slumps 2.5%, S&P 1% as revived AI doubts ignite tech selloff

US stocks fell sharply as renewed concerns over massive AI spending triggered a selloff in technology and semiconductor shares. The Nasdaq suffered its steepest one day decline since June, while the S&P 500 also dropped. Tesla and Meta fell, while oil prices climbed to a five-month high amid fresh Middle East tensions.

Oct 23, 2026 - 00:00
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US stocks today: Nasdaq slumps 2.5%, S&P 1% as revived AI doubts ignite tech selloff
US stocks fell sharply as renewed concerns over massive AI spending triggered a selloff in technology and semiconductor shares. The Nasdaq suffered its steepest one day decline since June, while the S&P 500 also dropped. Tesla and Meta fell, while oil prices climbed to a five-month high amid fresh Middle East tensions.

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