KOSPI Volatility Surpasses Bitcoin as South Korean Market Continues to Swing

The KOSPI, South Korea's benchmark equity index, has become one of the most volatile stock markets in the world. In 2026, its annualized volatility exceeded 60%, surpassing even Bitcoin's legendary price fluctuations and roughly doubling that of Japan's Nikkei.

The root cause of this high volatility is largely attributed to two semiconductor giants, Samsung Electronics and SK Hynix, which together account for over 50% of the KOSPI's total index weight. When AI chip sentiment suffers a downturn, the entire South Korean equity market takes a hit.

South Korean regulators responded by introducing measures aimed at cooling volatility. These included caps on individual investments in single-stock leveraged ETFs and increased trading costs. However, the US Treasury market has remained largely unaffected, with ten-year yields trading within a narrow range of 4.65% to 4.73% through late July 2026.