NEW YORK – Oct. 22, 2026 (STL.News) U.S. stocks finished Thursday sharply mixed as concerns about the rising cost of artificial intelligence investments triggered heavy selling in technology companies, sending the Nasdaq Composite down 2.60% and pushing the S&P 500 to its worst daily performance since July. The Nasdaq posted its steepest one-day decline since June as investors reacted to earnings announcements from Meta Platforms and Tesla, reassessed the financial demands of the artificial intelligence industry, and watched rising oil prices amid ongoing tensions involving Iran. The Dow Jones Industrial Average managed a slight gain, while the Russell 2000
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