S. Korea's market volatility surges to record high, rattling global investment ecosystem

Jul 21, 2026, 10:33 am

South Korea's stock market volatility has breached record levels, surpassing peaks seen during the 1997 Asian Financial Crisis and the 2008 Global Financial Crisis. Financial experts attribute this surge to single-stock leverage exchange-traded funds (ETFs), which are distorting supply and demand dynamics amid heightened uncertainties surrounding the semiconductor industry. Moreover, as the correlation coefficient between the local market and the U.S. Nasdaq nearly tripled, South Korea's severe market swings are increasingly disrupting the global investment ecosystem.

According to the Korea Exchange on July 20, the average intraday volatility of the benchmark KOSPI reached 6.75% from early this month through July 16. This exceeds the volatility levels recorded during the 2008 Global Financial Crisis (6.11%) and the 1997 Asian Financial Crisis (5.37%). The VKOSPI—a key gauge of market volatility—also hit an all-time high of 96.94 on June 29.

The domestic market's extreme volatility was on full display during the session. Plummeting from early trading, the KOSPI sank to the 6,500 level as sell sidecars were triggered simultaneously across both the KOSPI and KOSDAQ markets. Market analysts point out that this elevated volatility escalated significantly following the introduction of single-stock leverage ETFs. Out of 38 total KOSPI sidecars triggered this year, 20 occurred after May 27, when leverage ETFs were officially listed; similarly, 5 out of 7 circuit breakers were triggered after that date.

This volatility amplified by leverage ETFs is spilling over into global equity markets. According to Bloomberg, the 60-day correlation coefficient between the KOSPI and the U.S. Nasdaq 100 Index recently surged to 0.46—nearly triple its five-year average of 0.16. Ivan Feinseth, Chief Investment Officer at Tigress Financial Partners, noted, "South Korea has become part of the same volatility ecosystem as the Nasdaq and the Philadelphia Semiconductor Index," adding that "Samsung Electronics, SK Hynix, and the KOSPI serve as pre-market signaling tools to gauge risk for U.S. AI and semiconductor stocks."

On the day, the KOSPI opened at 6,643.58, down 177.02 points (2.60%) from the previous trading day, before closing at 6,516.27, down 304.33 points (4.46%). Even on the first trading day following the government's announcement of regulatory measures targeting single-stock leverage products, trading volume across 16 single-stock leverage ETFs tied to Samsung Electronics and SK Hynix exceeded 12 trillion won, showing virtually no immediate impact from the regulations.

Han Hye-sung

#Investment #Stock