South Korea's Kospi plunges about 10% and triggers a 20-minute circuit breaker as SK Hynix and Samsung each fall more than 12%, accelerating a global technology selloff.Nasdaq futures and S&P 500 futures decline sharply while European technology stocks and semiconductor exchange-traded funds, including the Technology Select Sector SPDR Fund and the VanEck Semiconductor ETF, lose ground as Micron Technology and other chipmakers slide.Analysts link the rout to crowded artificial intelligence trades after a high-profile executive defected from Google and to the prospect of Federal Reserve rate increases, though Federal Reserve Chair
Kevin Warsh makes no new announcements; investors rotate into defensive stocks such as Walmart and Johnson & Johnson while awaiting earnings from Cerebras and
Micron Technology.