S&P 500's 20 worst-performing stocks in first half of 2026

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

During the first half of 2026, twenty stocks within the S&P 500 index experienced significant declines in value. MarketWatch identified and reported on these stocks that saw the largest percentage drops during this period. The report provides data on major stock market underperformers in the first six months of the year.