“We are all Korean investors now,” said Hani Redha, a London-based portfolio manager at PineBridge Investments.

The sharp swings have unsettled investors and regulators alike, with market movements increasingly driven by leveraged investment products rather than corporate fundamentals. The…

SK Hynix surpassed Samsung as South Korea's most valuable company with a $1.35T market cap, driving massive KOSPI volatility tied to AI chip demand.