Korean Retail Investors Hit by Leveraged Semiconductor ETF Margin Calls as Regulators Raise Entry Barriers
Miles Bennett
A 2x leveraged ETF tracking SK Hynix has plunged roughly 70% from its June peak, with Korean retail investors absorbing most of the ₩14 trillion in net purchases — regulators have now raised the entry threshold tenfold.
How bad is the damage?
The KODEX SK Hynix single-stock leveraged ETF — a fund that doubles SK Hynix's daily moves — has fallen roughly 70% from its June high and about 50% from its May 27 listing price.
This means → ₩1 million invested at listing is now worth about ₩500,000; the same amount invested at the June peak is worth roughly ₩300,000.
Retail investors net-bought ₩14 trillion (≈$9.4 billion), while foreign investors bought only about ₩2 trillion — retail bore almost all the losses.
Are these inexperienced newcomers?
Fibonacci Asset Management founder Jung In Yun says the buyers were not naive trend-chasers. Many are investors in their 40s and 50s, accustomed to using leverage and concentrating bets on tech stocks.
In plain terms = this is not a story of beginners getting wiped out — it is experienced investors over-leveraging a familiar trade and getting the direction wrong.
KB Financial Group's global investment strategy head Peter Kim warned that single-stock leveraged ETFs have become speculative tools, not long-term vehicles, and that continued oversupply could trigger a prolonged downturn.
How fast did leverage build up?
Oxford Economics data: by June, the top 25 Korean leveraged ETFs held roughly 30% of thematic-fund assets, doubling from about 15% at the start of 2026.
The Bank of Korea confirmed last month that retail leveraged equity investment has climbed to a record high, driven by margin borrowing and concentrated in the semiconductor sector.
The central bank judged this leverage cycle "unlikely to pose a systemic threat" but warned that leverage amplifies volatility during corrections — especially for investors who borrowed to chase rallies.
What have regulators done?
Korean regulators announced tighter rules on Thursday: investors must now hold at least ₩30 million in cash to trade single-stock leveraged ETFs — a tenfold increase from the previous effective threshold of ₩3 million.
This means → a large share of smaller retail accounts will be locked out, sharply narrowing the flow of new money into these products.
Oxford Economics downgraded Korean equities to neutral at the end of June, citing the leverage build-up and the growing reluctance of brokerages to extend credit to retail investors.
Is the deleveraging over?
Great Hill Capital chairman Thomas Hayes takes a more bearish view: semiconductors and memory are the most crowded trade among global institutional and retail investors alike.
He expects hyperscale cloud companies to cut capital-expenditure guidance in their Q2 earnings, which would drive money out of the sector with the same force that crowded it in.
Put simply = money that stampeded in will stampede out. Whether Q2 earnings season delivers enough demand-side support is the key test for whether this deleveraging can stabilize.
Content is for reference only, not financial advice.