On April 4, South Korea's securities markets faced unprecedented drops, attributed to the repercussions of the escalating US-Iran conflict. The KOSPI index plummeted by 12.06%, while the KOSDAQ index fell even harder at 14.0%, marking the largest declines ever recorded in both markets. This staggering decline led to a circuit breaker being activated, halting all trading as panic spread among investors. The previous day saw the market already reeling from a 7.24% drop, indicating a growing wave of sell-offs fueled by fears of geopolitical instability.

As the two-day cumulative decline reached alarming levels, particularly for the KOSDAQ, which dipped below the crucial 1000 mark for the first time since January 23, investor anxiety soared. The KOSPI's market capitalization saw a significant hit, losing approximately 951 trillion won in total value amidst the turmoil. The KOSPI200 Volatility Index (VKOSPI), often referred to as South Korea's fear gauge, soared to an all-time high, reflecting the heightened investor fear and uncertainty. Samsung Electronics and SK Hynix also experienced dramatic falls in their stock prices, contributing to the overall sense of crisis.

These events signal a tumultuous period for South Korean investors, particularly those heavily invested in the stock markets. With rising tensions in the region, the situation poses long-term implications for investor confidence and market stability. Analysts are now closely monitoring the developments in US foreign policy and its impacts on the Korean economy, as further military actions could exacerbate the already fragile market conditions.