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

The Korea Composite Stock Price Index (KOSPI) fell roughly 9% in a single session, triggering a circuit breaker that halted trading, according to a Watcher Guru report. Circuit breakers are mechanical limits that pause trading to contain disorderly selling, so a move of this magnitude signals a sharp, broad-based repricing of Korean equity risk rather than a contained sector sell-off. The transmission channel most likely runs through risk appetite and capital flows, as foreign investors who dominate Korean large-cap liquidity reduce exposure and export-heavy, semiconductor-linked names face the steepest repricing. The S&P 500 is exposed indirectly through global risk sentiment and the technology supply chain, since Korean chipmakers are significant suppliers to US-listed hardware and AI-related firms. Traders should watch the reopening of the KOSPI and the subsequent behavior of foreign net-flow data, along with any regulatory or central bank response, to judge whether the selloff is containing or spreading.

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