BUSINESSJun 30 · 11:55 UTCMARKETWATCHHannah Pedone

20 stocks in the S&P 500 that plunged the most in 2026’s first half

20 stocks in the S&P 500 experienced the largest declines in the first half of 2026 due to investor concerns about potential market share losses to AI tools.

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S&P 500organizationAI toolstopicMarket Sharetopic

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