**JUST IN:** 🇰🇷 South Korea's KOSPI stock market crashes 9%, triggering circuit breaker and halting trading.

The KOSPI index fell roughly 9% in a single session, triggering a circuit breaker that halted trading on South Korea's main equity benchmark. Circuit breakers of this kind are designed to pause trading when a sharp decline threatens disorderly price discovery, and such a move typically signals a sudden, broad repricing of Korean equity risk rather than a single-stock event. The transmission to U.S. markets would most plausibly run through global risk appetite and semiconductor exposure, since Korea's index is heavily weighted toward chipmakers whose earnings are closely linked to global AI and memory demand, and a rapid reassessment there can spill into S&P 500 technology names via shared sentiment and cross-border positioning. Traders should watch the Korean session's reopening and the behavior of semiconductor equities on U.S. markets, along with the Bank of Korea's and U.S. Federal Reserve's policy communications and any early-morning U.S. futures moves, for evidence of whether the selloff remains regionally contained or broadens into a global risk-off episode.

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