What caused the circuit breaker in South Korea?

The KOSPI fell 8.52% within minutes of the open, staying more than 8% below the prior close for a continuous minute, which triggered a Level 1 circuit breaker at 9:03 a.m.

How did major chip stocks perform?

SK Hynix fell more than 11.5% and Samsung Electronics was down nearly 10% in Seoul, while TSMC dropped 9.6% intraday in Taipei.

AI Stocks & MarketsAI Business & IndustryAI Weekly1h agoNov 7, 2026, 01:00 JST

Taiex plunges 3,737.67 points; Korea triggers circuit breaker

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3 Key Points

What happened
Taiwan's Taiex fell as much as 3,737.67 points intraday, its largest-ever point drop, closing 4.51% lower at 39,701.64. Korea's KOSPI plunged 8.52% at the open, triggering a 20-minute Level 1 circuit breaker.
Why it matters
The sharp declines pushed these chip-heavy benchmarks toward technical bear territory, reflecting a broad sell-off in the region's technology stocks.

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Context & Analysis

The sell-off in Asia followed an overnight rout on Wall Street, which was tied to Democratic gains in this week's US midterm elections and investor concern that incoming lawmakers could slow the country's data-center build-out. Worries over data center curbs accelerated the skid in Asian markets. This is the second AI-chip rout alert in two days; on Wednesday the Nasdaq 100 had erased a record $2.3 trillion in a single session.

FAQ

What caused the circuit breaker in South Korea?: The KOSPI fell 8.52% within minutes of the open, staying more than 8% below the prior close for a continuous minute, which triggered a Level 1 circuit breaker at 9:03 a.m.
How did major chip stocks perform?: SK Hynix fell more than 11.5% and Samsung Electronics was down nearly 10% in Seoul, while TSMC dropped 9.6% intraday in Taipei.

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