Keyword → AI bubble

South Korea Kospi Plunges 4.9% as Samsung Falls 4.4% and SK Hynix 3.3% — AI Bubble Fears Trigger Sidecar Trading Halt

South Korea's Kospi sank 4.9% to 6,490 on Monday, with Samsung Electronics losing 4.4% and SK Hynix falling 3.3%, as investors accelerated a global rotation out of AI-linked semiconductor names. The Korea Exchange activated a sell-side sidecar, temporarily halting program trading. The selloff extends a broader pattern of AI valuation doubts that pulled global tech markets lower last week, even as Nasdaq futures edged higher. TSMC rose 2% in Taipei after falling 7.3% on Friday following its $265B US expansion pledge.