KOSPI Plummets as Investors Cash In After AI-Fueled Rally; Trading Curb Temporarily Activated
South Korea's benchmark KOSPI sank sharply as investors took profits after an extended rally led by semiconductor stocks and foreign capital flows. The drop was large enough to activate a sidecar trading curb that temporarily halted program trading, while a report that South Korea would be excluded from MSCI's developed markets index compounded sel…