Nvidia fell 3.55% and the VanEck Semiconductor ETF lost 4.79% in a selloff Michael A. Gayed called a market stress test, not routine noise. The drop hit one of

Nvidia fell 3.55% and the VanEck Semiconductor ETF lost 4.79% in a selloff Michael A. Gayed called a market stress test, not routine noise. The drop hit one of the market’s most crowded trades, raising concerns over positioning and risk appetite.