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South Korea’s KOSPI tumbles over 8%, triggering circuit breaker

South Korea’s KOSPI tumbles over 8%, triggering circuit breaker

South Korea’s benchmark briefly fell nearly 9% intraday before closing down 5.81% on June 26, as Samsung Electronics and SK Hynix slumped in a wider Asian equity sell-off led by chip-related weakness.

Fact Check
The Securities Times (证券时报/人民财讯) confirms KOSPI fell to a 4% loss at 8572.69 points on 2026-06-26, matching the claimed index level exactly. The BlockBeats source provides the full detail: KOSPI -4.00% to 8572.69, SK Hynix -4.32%, Samsung -4.04%. Both SK Hynix and Samsung dropped more than 4%, supporting the claim's wording. Moomoo and TechFlow searches return identical figures, indicating broad cross-source agreement.
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Summary

South Korea’s KOSPI dropped more than 8% intraday on June 26, triggering a circuit breaker before recovering to close down 519.1 points, or 5.81%, at 8,411.2. Samsung Electronics fell more than 5% and SK Hynix dropped more than 8%, after both had been down about 9% during the session, while foreign investors were net sellers of 2.5 trillion won ($1.6 billion) of KOSPI shares in morning trade. Japan’s Nikkei 225 fell 3,005.46 points, or 4.15%, to 69,360.88, and Taiwan’s weighted index lost 3.82%. The KOSPI fell 7.1% for the week, its largest weekly drop since early March.

Terms & Concepts
  • KOSPI: South Korea’s main stock market index.
  • circuit breaker: A temporary trading halt triggered by sharp market swings.
  • high-beta stocks: Shares that tend to move more sharply than the broader market, rising and falling by larger amounts.