South Korea’s KOSPI plunged 9.99% to about 8,204 after Samsung Electronics and SK Hynix each fell more than 12%, triggering a market-wide trading halt and underscoring how heavily the benchmark depends on the two chipmakers. The selloff spread across Asian and U.S. technology shares and into crypto, with Bitcoin briefly dropping below $62,000 before recovering near $62,500, while volatility gauges rose and crypto-linked stocks weakened. In a subsequent session, the KOSPI rebounded 4% as Samsung and SK Hynix led gains, but the sharp reversal again highlighted concentration and leverage risks in South Korea’s market.