South Korea's Kospi index faces extreme volatility, with sharp gains and losses driven by the global AI boom, highlighting rapid shifts between investor euphoria and panic.

Kospi index sinks 10% after regulatory warnings over leveraged ETFs spark forced selling in chip heavyweights

South Korea's KOSPI index plunged nearly 10% as SK Hynix and Samsung sell-off triggers circuit breakers, raising doubts about AI-driven stock valuations.