The Bank of Korea has issued a formal warning that single-stock leveraged ETFs linked to Samsung Electronics and SK Hynix are destabilizing markets by amplifying volatility and deepening sector concentration.
These are 2x daily leveraged products. Their assets under management exploded from roughly $3B at their April 2026 launch to approximately 14 trillion won, around $9.1B, by mid-June. The central danger lies in the ownership structure: 92% of holders are retail investors, many of whom have suffered steep losses in downturns.
The central bank is specifically concerned about the forced trading mechanics of these funds. Leveraged ETFs must rebalance daily. When the underlying stocks fall, the funds become forced sellers into declining prices, and vice versa when they rise, creating lopsided, one-directional trading flows.
This risk arrives alongside a record retail margin debt level of 60 trillion won, roughly $39B. The demand for leveraged ETFs is cited as a factor in that acceleration. The Financial Supervisory Service, which required investors to pass an exam to access these products, has already expressed regret over the rapid approval process, noting the negative consequences are now clearly visible.