South Korea’s Kospi plunged 10% on Tuesday, triggering a circuit breaker and a 20-minute trading halt. SK Hynix and Samsung, which together account for about half of the Kospi’s market value, each fell more than 12%, dragging regional tech shares lower. Japan’s Nikkei fell 3.6% and SoftBank slid 15%, while in the U.S. the Nasdaq dropped 1.3% and the S&P 500 fell 0.8%. Oil prices edged down on signs of progress toward peace in Iran, a move the report said was not directly tied to the AI-driven selloff.