Panic gripped South Korea’s financial markets on Thursday as the KOSPI plunged by as much as eight percent, forcing exchange officials to trigger a circuit breaker that brought all trading to a sudden standstill at midday. The dramatic slide was fueled by a wave of selling across the technology sector, leaving investors scrambling as several months of hard won gains vanished in a matter of hours.

The epicenter of the crash centered on the country’s semiconductor giants, which serve as the backbone of the national economy. Industry titans Samsung Electronics and SK Hynix bore the brunt of the volatility, seeing their share prices collapse between nine and eleven percent. This aggressive sell off erased nearly every gain the index had managed to secure since its peak back in June, marking one of the most severe downturns seen in recent memory.

Market analysts suggest that a toxic combination of chip industry instability and growing anxiety over U.S. Federal Reserve policy created a perfect storm for the slump. With traders fearing higher interest rates for longer and shifting demand for AI hardware, confidence evaporated quickly among both domestic and international holders. As trading resumed later in the day, participants remained cautious, watching closely to see if global sentiment would stabilize or if further contagion would spread through Asian markets.