The South Korean stock market, represented by the KOSPI, has seen dramatic fluctuations over the past week, with daily changes ranging from -12.06% to +9.63%. This is an unusual level of volatility that is reportedly larger than in other major global markets. Analysts attribute the heightened volatility to a combination of short-term surges and structural factors affecting the market. The Korea Exchange implemented measures including a 'sell-sidecar,' pausing sell orders for five minutes, and later a 20-minute trading halt, marking the second circuit breaker event for the year.

The KOSPI index, which had initially surpassed the 6300 mark last month, has been highly reactive, particularly following military actions in the Middle East, like the recent US and Israeli airstrikes against Iran. This geopolitical tension has adversely impacted global stock markets, with Korea's stock response being notably severe, dipping nearly double the decrease seen in the Japanese Nikkei 225 index during the same period. The market has shown a decline of 10.6% from February 27 to March 6, whereas European stocks like the Euro Stoxx 50 and US benchmarks such as the S&P 500 showed lesser declines.

Experts have pointed to structural market conditions and the aftermath of a recent sharp increase as causes for this pronounced market instability. Yi Ho-seop from the Capital Market Institute mentions that the KOSPI's volatility is exacerbated by a concentration effect among large semiconductor stocks. Research Center Director Kim Hak-kyun highlights the role of Exchange-Traded Funds (ETFs), noting that the significant growth of the ETF market over the last decade has amplified the mechanical buying and selling impact on stock indexes. He explains that when funds flow into the market, popular stocks surge even more, but when funds pull out, the result is further downward pressure on stock prices.