KOSPI crash triggers circuit breaker, crypto faces risk-on unwind

South Korea's KOSPI index crashed 8.95% in a single session, hitting a circuit breaker after a 15% intraday drop. The slide from June's peak of 9,155 points to below 6,800 erased most of the year's gains, which had reached 122% before the selloff, according to exchange data.

The selloff was driven by leveraged retail positions that had fueled the rally, a report noted. The KOSPI's heavy reliance on semiconductor stocks, particularly HYNIX which lost 19% in the past week, made it vulnerable to the unwind of the AI trade. The index's forward P/E ratio fell to 6.4x, the lowest since the 2008 financial crisis, reflecting distrust in semiconductor sales growth.

The KOSPI crash coincided with Bitcoin rejecting the $64,000 level, slipping to a lower range before recovering to $63,000. The correlation suggests crypto remains a risk-on asset, moving in sympathy with equities. On Hyperliquid, Samsung perpetual futures saw peak volumes and an 8.38% decline, reflecting the contagion into crypto derivatives. The broader crypto market analysis shows similar patterns in risk appetite.

The KOSPI circuit breaker was the seventh of 2026, signaling persistent fragility. The rally had attracted foreign buyers who began divesting in late June, leaving retail investors holding the bag. The current drawdown may push some South Korean retail back into crypto, as they rotate out of stocks, or it could deepen risk-off sentiment if the unwind spreads to U.S. markets. The KOSPI still trades with a strong sell recommendation, according to the report.

Bitcoin's profile shows it has tracked equity risk sentiment closely this year. The next catalyst is the U.S. open, where any further equity selling could accelerate Bitcoin's decline.