South Korea's Mock Trading Course Curtailed Leveraged ETF Trading

Regulatory Intervention Targets Market Volatility

South Korean financial authorities have implemented measures to address heightened volatility in the domestic stock market, particularly concerning leveraged exchange-traded funds (ETFs). These products, offering twice the daily returns of chipmakers Samsung Electronics Co and SK Hynix Inc, contributed to substantial price fluctuations.

The Korea Exchange introduced a mandatory five-day simulated trading course, effective 19 August 2026, as the latest regulatory step. This requirement builds on previous tightening actions, including an increased minimum deposit, initiated in July 2026.

The objective is to moderate investor enthusiasm for these instruments and restore stability, particularly given that the Kospi benchmark, while up 61% in 2026, remained 25% below its June 2026 record high as of late August 2026.

The focus on these specific ETFs stems from their significant market presence, where, during their peak activity, combined turnover with the underlying chipmaker stocks represented over 80% of the market's total.

Simulated Trading Imposes Practical Barriers

The new simulated trading course requires investors to download a Windows-only software program onto a personal computer and dedicate at least one hour daily to learning the operational aspects and associated risks of leveraged trading using virtual capital. This practical barrier appears to be a significant deterrent.

Kim Jung-hoon, a 41-year-old Gyeonggi province resident, stated he would not attempt the course due to the perceived inconvenience, citing the time commitment and the restriction to PC downloads.

Another retail investor, identified only by the surname Lee, confirmed meeting other prerequisites, such as the 30 million won minimum cash deposit, but declined to proceed with the mock trading due to the software download and time obligations.

The Korea Exchange has not disclosed the number of participants who have downloaded the program since its launch and has no plans to introduce a mobile-based platform, reinforcing the current access limitations.

Market Activity Contracts Following New Rules

The regulatory adjustments have coincided with a notable reduction in trading activity for the targeted leveraged ETFs. Trading value for these products decreased to 4% of their June 2026 peak, indicating a substantial contraction in market participation.

Data compiled by Bloomberg Intelligence shows combined outflows of approximately US$1 billion from these single-stock ETFs in August 2026, marking their first monthly capital exodus. This led to a reduction in their combined assets under management, which shrank to US$5 billion as of 27 August 2026, from a peak of US$11.4 billion in late June 2026.

Rebecca Sin, an analyst with Bloomberg Intelligence, stated in August 2026 that these outflows may continue as regulators maintain their tightening stance. This shift demonstrates a change in approach from supporting these products to actively restraining them, reflecting concerns over market stability.

Stabilisation Amid Shifting Investor Sentiment

While the rapid reduction in trading might be challenging for existing investors seeking to exit positions, it has contributed to market stabilisation. The Kospi’s volatility gauge decreased to approximately 50 in late August 2026, a four-month low, down from its peak of 97 in late June 2026.

This suggests that the regulatory interventions are achieving their objective of mitigating excessive market swings. Retail investor sentiment also appears to be influenced by broader market conditions. Park Ki-duck, a 39-year-old investor, noted that the diminishing appeal of the artificial intelligence (AI) trade has reduced his interest in leveraged ETFs.

He indicated that he would only consider navigating the regulatory requirements if market conditions for the AI or memory chip industry were significantly more favourable, suggesting a link between perceived profit potential and willingness to overcome administrative hurdles.

Consequence for Regulatory Approaches and Market Structure

The South Korean experience with leveraged ETFs demonstrates the effectiveness of targeted regulatory friction in moderating speculative activity and restoring market stability.

The mandatory simulated trading course, combined with other measures, has directly resulted in a 96% reduction in trading value from its June 2026 peak and a US$1 billion capital outflow from these products in August 2026.

For decision-makers in other Asian markets considering similar instruments or facing comparable volatility, this case shows that administrative burdens, even those perceived as cumbersome, can significantly alter investor behaviour and capital flows.

Future policy discussions concerning retail access to complex financial products in Asia will likely reference the Korea Exchange's approach, particularly its impact on the Kospi’s volatility gauge, which decreased by 47 points from late June to late August 2026.

The sustained low volatility print of around 50 will be a key metric to watch in Q4 2026 to assess the long-term efficacy of these measures.