U.S. stock market midday update: Founder stock price plummets 26.14%, trading volume surges, what causes such volatility in market sentiment?

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2026.05.28 14:42
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Founder fell 26.14%; Sterling Infrastructure rose 0.80%, with a transaction volume of USD 167 million; Daikang Industrial fell 0.04%, with a transaction volume of USD 163 million; Comfort Systems USA fell 2.58%, with a transaction volume of USD 153 million; Quanta Services fell 1.12%, with a market value of USD 109 billion