Kospi Plunges Over 8% Intraday as South Korea Triggers Circuit Breakers Across Both Markets

📉 On October 15, the Kospi fell more than 8% intraday, triggering a Level 1 circuit breaker and a 20-minute trading halt. The Kosdaq activated the same mechanism. By the close, the Kospi had declined 7.57% to 5,554.22 points, while the Kosdaq lost 7.65%.

📊 Selling pressure was concentrated in semiconductor stocks, with Samsung Electronics and SK Hynix falling approximately 9–11%. The selloff came amid elevated US inflation, growing concerns over Fed interest rate policy, and uncertainty surrounding returns on AI infrastructure investments.

🌐 Foreign investors recorded net sales of approximately 3.62 trillion won on the Kospi, reflecting substantial capital outflows. The decline added pressure to South Korean equities, particularly companies heavily exposed to the AI investment cycle.

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