South Korea’s KOSPI 200 volatility index (VKOSPI), a key barometer of investor sentiment in the country’s stock market, broke below the 40 level intraday, falling to its lowest point in about six months. The market’s anxiety—which had spiked to extreme levels in the first half of the year at the peak of the global semiconductor rally—is now clearly subsiding.
According to the Korea Exchange on September 4, VKOSPI plunged 3.10 points, or 7.31%, from the previous session to 39.32 in afternoon trading. It was the first time the index fell below 40 intraday since February 12, when it hit an intraday low of 39.13.
VKOSPI is an annualized measure of expected 30-day volatility implied by KOSPI 200 options prices, widely regarded as a gauge of market fear. Since 2010, its average has hovered around 20, but it began climbing sharply this year.
In May, when the KOSPI surpassed the 7,000 mark for the first time ever on the back of an extraordinary global semiconductor rally, VKOSPI’s monthly average soared to 68.78. As the benchmark index broke through 8,000 on May 15 and reached the 9,000 level on June 18, VKOSPI skyrocketed to an intraday high of 97.99 on June 29.
The surge in volatility was attributed to extreme investment overheating, market concentration in Samsung Electronics and SK Hynix—which together accounted for more than half of the KOSPI’s total market capitalization—and volatility amplification from the launch of single-stock leveraged and inverse products tied to those two stocks.
When the global semiconductor correction began, the KOSPI plunged more than 20% during July, yet VKOSPI remained elevated above the 80 level. It was only after South Korea’s financial authorities implemented supplementary measures on single-stock leveraged and inverse products in late July that the index began its sharp descent.
Regulators raised the base margin requirement for these products from 10 million won (approximately $7,400) to 30 million won (approximately $22,000) and changed rules so that sale proceeds are only recognized as margin on the settlement date (T+2), when cash is actually deposited. As a result, daily trading volume in single-stock leveraged and inverse products—which had ballooned to 19.4429 trillion won (approximately $14.4 billion) on June 24—plummeted to roughly 500 billion won (approximately $370.1 million) by the end of last month.
Analysts note that the conclusion of the global semiconductor correction and the emergence of sector rotation within the market have also contributed to easing volatility. Despite ongoing external headwinds—including renewed armed conflict between the U.S. and Iran and surging government bond yields in major economies—institutional investors classified as “other corporations” have continued net buying of approximately 1 trillion won (approximately $740.3 million) daily, driven by Samsung Electronics and SK Hynix share repurchases, providing a floor for the market.
On September 4, the KOSPI closed up 1.89% at 6,703.65, while the KOSDAQ rose 3.13% to 814.93. However, short-term volatility persists—on September 3, the previous trading day, the KOSPI abruptly plunged in afternoon trading, briefly falling into the 6,400 range.
The decline in VKOSPI suggests investors now see a lower probability of sharp swings in the KOSPI 200 over the next 30 days. Market observers say the abnormal volatility structure created by the first-half semiconductor concentration and leveraged product frenzy is now normalizing through regulatory action and market adjustment.