Key Takeaways:
South Korea's financial regulator is tightening the screws on single-stock leveraged products after a 170% surge in market value triggered alarm.
The Financial Services Commission raised the minimum cash deposit for single-stock leveraged ETFs to 30 million won ($21,700) on July 24, advancing the effective date to July 31 as product market cap swelled to 11.9 trillion won.
"The decision to combine both measures and move the timeline forward reflects the urgency of addressing the rapid inflow of investment funds," the Financial Services Commission said in a July 24 statement.
The new rules eliminate substitute collateral — stocks, ETFs and bonds that previously covered as much as 70% of the deposit requirement — leaving cash as the only acceptable form. Sale proceeds from stock disposals will now be recognized only after T+2 settlement, rather than on the trade date. Securities firms that previously could lower the deposit threshold after three months of trading history are now prohibited from doing so and may only tighten requirements further.
The clampdown targets products that have reshaped South Korea's equity market since their May 27 debut. Single-stock leveraged ETFs and ETNs tracking Samsung Electronics, SK Hynix, Tesla and Nvidia saw combined market value surge 170% to 11.9 trillion won by July 15, with daily trading volume reaching 13 trillion won. The KOSPI's volatility index hit a record 97.99 on June 29, more than triple its 28.85 reading at end-2025, as daily rebalancing flows from these products amplified swings in the benchmark's two largest components.
The products, which initially covered 16 underlying stocks with a combined 4.4 trillion won in market value on launch day, expanded to 11.9 trillion won by July 15 — a 170% increase in less than two months. Daily trading volume climbed from 10.4 trillion won on the first day to 13 trillion won by mid-July, according to data from the Korea Exchange.
The concentration risk is acute. Samsung Electronics and SK Hynix together account for more than 80% of KOSPI trading volume on some days this year, Reuters calculations show, and the daily rebalancing of leveraged ETF positions at market open and close has exacerbated intraday swings. The KOSPI volatility index stood at 89 on July 24, well above the 28.85 level at the end of 2025.
The July 31 measures are part of a broader regulatory crackdown. The FSC suspended new product listings and banned promotional activities on July 16. Starting Aug. 19, the tracking error tolerance for these products will tighten to 2% from the current 3%, with stricter penalties for violations.
Additional proposals under discussion include reducing the number of liquidity providers for single-stock leveraged ETFs, widening bid-ask spreads, and cutting the maximum leverage ratio to about 1.5 times from the current 2 times. The FSC is also considering advancing a plan to raise the minimum trading unit from one share to 20 shares, originally scheduled for November.
For existing investors, the new 30 million won cash requirement applies to any additional purchases, though selling current holdings remains unrestricted. The FSC recommended that securities firms unable to complete system upgrades by July 31 restrict new trading in these products.
The accelerated timeline signals regulatory urgency that could trigger de-leveraging flows in the days immediately following implementation. With the KOSPI's two largest stocks — Samsung Electronics and SK Hynix — serving as the most popular underlying assets, any forced selling from cash-constrained retail investors could amplify downward pressure on the benchmark. The broader discussion of cutting leverage ratios to 1.5 times suggests authorities view the current 2-times structure as incompatible with market stability, raising the prospect of a structural reduction in the products' appeal.
This article is for informational purposes only and does not constitute investment advice.
