The South Korean stock market, represented by the KOSPI index, has experienced a significant drop of nearly 10%, primarily driven by extreme volatility in the technology sector. This downturn has led to a circuit breaker being triggered, halting trading in response to the dramatic selloff. Share prices of major tech companies like Samsung and SK Hynix have seen significant declines, contributing to fears of a broader market adjustment. Emerging markets are also feeling the impact, with stocks and currencies weakening in response to the Korean selloff. Analysts attribute the sharp decline to profit-taking and investor caution as the AI and semiconductor hype faces a cyclical correction.