South Korea Weighs Tighter Limits on Leveraged ETFs as Samsung, SK Hynix Rout Fuels...

South Korea's financial watchdog is considering stricter curbs on retail trading of single-stock leveraged exchange-traded funds (ETFs), including investment caps for individual investors, as a sharp selloff in the country's semiconductor heavyweights intensified concerns over market volatility and speculative trading.

Lee Eog-weon, chairman of the Financial Services Commission (FSC), said authorities are reviewing additional measures to cool demand for the high-risk investment products, according to local media reports.

Speaking at a meeting with brokerage firms and asset managers in Seoul on Tuesday, Lee said regulators could introduce a ceiling on the total amount retail investors are allowed to invest in single-stock leveraged ETFs if market conditions warrant further intervention.

The proposal would mark another step in South Korea's efforts to curb speculative trading in products that have surged in popularity among individual investors seeking amplified returns from the country's dominant technology stocks.

The FSC last week tightened regulations by raising the minimum cash deposit required for retail investors to trade single-stock leveraged ETFs, many of which are tied to Samsung Electronics and SK Hynix, the world's two leading producers of memory chips.

The regulatory review comes as South Korea's equity market experiences heightened turbulence, driven by a sharp reassessment of the global artificial intelligence investment theme that has propelled semiconductor stocks over the past two years.

Samsung Electronics shares plunged as much as 9.7% in Seoul on Tuesday after investors grew increasingly concerned that the company could lose market share in memory chips to Chinese rival ChangXin Memory Technologies (CXMT). Investor sentiment was also weighed down by mounting concerns over the financial risks associated with the massive wave of AI infrastructure spending, prompting a broader reassessment of semiconductor valuations.

SK Hynix, another major beneficiary of the AI-driven surge in demand for high-bandwidth memory (HBM) chips used in advanced AI processors, fell as much as 11.2% in Seoul. The decline followed a 10% drop in the company's recently listed American depositary receipts (ADRs) on the Nasdaq on Monday, pushing the shares below their IPO price and underscoring the global nature of the selloff.

The steep declines indicate that sentiment has quickly shifted across AI-linked equities. Investors who had aggressively piled into chipmakers amid expectations of sustained AI spending are increasingly questioning whether the industry's unprecedented capital expenditures can continue generating returns at a pace sufficient to justify elevated valuations.

Growing competition from Chinese semiconductor manufacturers has added another layer of uncertainty, particularly as Beijing accelerates efforts to build a self-sufficient chip industry.

Single-stock leveraged ETFs have become a favored vehicle for South Korea's retail investors, who are among the world's most active participants in equity markets. Unlike traditional ETFs that track diversified indexes, these products are designed to deliver a multiple of the daily performance of a single stock, using derivatives and leverage to magnify gains. The same structure, however, can amplify losses just as rapidly when markets reverse, making them particularly vulnerable during periods of sharp volatility.

Regulators have become increasingly concerned that concentrated retail positions in leveraged ETFs linked to a handful of large-cap technology stocks could exacerbate market swings. As investors rush to buy or sell these products, fund managers often need to rebalance their derivative positions, creating feedback loops that can intensify price movements in the underlying shares.

The latest regulatory scrutiny also reflects broader concerns about financial stability. South Korea has repeatedly introduced measures in recent years to curb excessive risk-taking by retail investors across various asset classes, particularly when speculative activity threatens orderly market functioning.

The semiconductor sector occupies an outsized role in South Korea's economy and financial markets. Samsung Electronics and SK Hynix together account for a significant share of the benchmark KOSPI index, meaning sharp movements in their shares can have an outsized impact on overall market performance, investor sentiment and foreign capital flows.

After years of rewarding companies building AI infrastructure, investors are now scrutinizing execution risks, rising competition and the sustainability of record capital spending. That reassessment has injected fresh volatility into semiconductor stocks while prompting regulators to monitor whether leveraged investment products could amplify market stress during periods of rapid price swings.