South Korean Retail Investors Retreat After Kospi's Record Volatility

The South Korean benchmark index, Kospi, experienced unprecedented volatility in July 2026, leading to a record retreat by retail investors from the market. The severe declines and sharp rebounds throughout the month significantly eroded confidence, particularly among individual investors who had taken on high risks through leveraged products. The 22% monthly loss in July marked its steepest decline since the global financial crisis, with circuit breakers being triggered four times, illustrating the scale of the market turmoil.

Encouraged by government market reform campaigns and the launch of single-stock leveraged exchange-traded funds (ETFs) in May and June, retail investors had poured approximately 78 trillion won (about $54.2 billion) into Kospi-listed shares. However, as markets reversed in July, they dramatically shifted to net selling, offloading 12.73 trillion won in the last three trading days of the month alone. During this period, over 1.2 million retail accounts faced forced liquidations totaling 870 billion won. Some reports indicate that the total value of forced liquidations reached 2.3 trillion won within two and a half months this year.

The extreme market volatility stemmed primarily from the rapid surge and subsequent sharp correction in the artificial intelligence (AI) chip sector. Earlier in the year, fueled by the AI boom and strong performances from semiconductor giants like Samsung Electronics (KS:005930) and SK Hynix (KS:000660), the Kospi had become one of the most-watched global indices, experiencing a significant rally. However, the concentration of these two companies, accounting for over half of the index, left the market highly exposed to shifts in sentiment towards AI and semiconductor spending.

The sell-off in July was concentrated on AI-linked companies. Samsung Electronics shares dropped 21% and SK Hynix fell 35% during the month. The market downturn was exacerbated by margin calls on leveraged accounts and increased panic selling by individual investors. In contrast to retail investors, foreign investors seized the opportunity to buy back at lower prices, making net purchases of 8.04 trillion won in the last days of July. This suggests that foreign investors saw potential for market valuations to recover.

The South Korean government promptly intervened to address the market turmoil. In mid-July, authorities temporarily suspended new listings of single-stock leveraged ETFs and capped individual investments in these products at 20% of their total investment. Officials also pledged further measures to stabilize the market and limit retail access to high-risk products. The government's apology for the market crash highlighted the political sensitivity of stock market performance in South Korea, given widespread retail participation.

Market analysts anticipate continued fluctuations in the Kospi, but expect pressure on leveraged ETFs to ease, with future performance largely dependent on semiconductor fundamentals. While some experts suggest the Kospi could quickly approach the 6,800-6,900 range if sentiment recovers, there is also an expectation of ongoing volatility due to the uncharted nature of the AI industry. The regaining of retail investor confidence and their return to the market are considered critical factors for the sustainability of any rally.