On May 27, 2026, South Korea introduced single-stock leveraged ETFs. These ETFs seek to provide double the daily percentage change of a single company's stock. Retail investors piled into the products.
A wave of speculative trading that had boosted one of the globe's most vibrant stock markets ended in heavy losses as the Kospi index underwent a severe downturn, driven primarily by a slump in semiconductor shares.
Leveraged ETFs amplify daily returns but also magnify losses, making them especially hazardous for investors who hold them beyond a single day. The Kospi's 35% plunge over the past month erased gains from the earlier rally, catching many retail traders who had bought these products near their peaks. The downturn was led by semiconductor heavyweights SK Hynix and Samsung Electronics, which had been the darlings of the speculative boom. South Korean retail investors, known for their aggressive trading style, often chase leveraged products to maximize returns in a bull market, but the sudden reversal resulted in catastrophic losses.
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After a rally fueled by excitement over AI and chip stocks, the Kospi experienced a steep downturn. However, a global slowdown in chip demand and rising valuations led to a sudden reversal. The leveraged ETFs, which rebalance daily, amplified losses as the market swung sharply, making them particularly dangerous for buy-and-hold investors.
Finance Minister Koo Yun-cheol yielded to legislators' calls to apologize during a parliamentary hearing on Wednesday, acknowledging that the single-stock leveraged ETFs were launched without adequate scrutiny, according to Reuters.
Lee Eog-weon, an official at the Financial Services Commission, said the agency is looking at ways to protect investors. "If necessary, there is a way to raise the investment requirements up to professional investors," Lee told the National Assembly's Political Affairs Committee in Seoul, according to the Seoul Economic Daily.
Lee further mentioned that authorities might reduce the leverage ratio of these products if lawmakers draft the required legislation. "Since [the tracking multiple of] two times is too large, lowering it would likely have an effect in terms of easing volatility," he said.
These two stocks had been at the center of South Korea's AI-driven rally, attracting massive retail inflows. The rapid reversal highlights the dangers of daily rebalancing in volatile markets, where even a single day's drop can compound losses for buy-and-hold investors.
The launch of single-stock leveraged ETFs in May 2026 was part of a broader effort to modernize South Korea's financial markets and attract global capital. However, regulators faced criticism for not adequately assessing the risks, especially given the aggressive trading habits of domestic retail investors who often treat these products as long-term bets. The resulting losses have prompted calls for stricter oversight and a potential re-evaluation of how such leveraged instruments are introduced in the future.
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