Aftermath of the US-Iran conflict, Korea Composite Stock Price Index records the largest decline in history

Affected by the aftermath of the U.S.-Iran war, South Korea’s KOSPI index experienced its largest decline in history. On March 4, 2026, the KOSPI dropped 698.37 points from the previous trading day, a decline of approximately 12.06%, closing at 5,093.54 points. This broke the previous record for the largest drop and is comparable to the impact of the September 11, 2001 terrorist attacks on the U.S. stock market. The index has fallen more than 1,150 points over two consecutive days, intensifying anxiety in the financial markets.

This sharp decline was mainly driven by the escalation of military conflict between the U.S. and Iran. As tensions in the Middle East increased, financial markets such as international oil prices and exchange rates became volatile, and investors’ unease grew. Especially amid the complex international situation, the domestic stock market showed a strong sell-off trend.

Such stock market declines not only cause losses for investors but may also impact economies worldwide. With ongoing geopolitical uncertainties, global financial markets and economies are expected to face greater volatility. Investors need to make more cautious decisions, and governments and financial regulators must continue monitoring and responding to market developments.

Meanwhile, on the same day, Seoul gasoline prices also surged significantly, posing a considerable impact on the domestic economy. Due to the Middle East tensions, international oil prices rose, causing the average gasoline price in Seoul to surpass 1,800 won. This is expected to directly increase the living costs for consumers.

Future volatility in financial markets may persist depending on further developments in the international situation. The progression of the U.S.-Iran conflict will be crucial, and economic experts predict that market stabilization will take time.