South Korea Freezes New Single-Stock Leveraged ETFs, Triples Margin Requirement After Kospi's Wild Week

How large is leveraged and inverse ETF trading in South Korea?

According to a Cnyes report citing Samsung Asset Management (Hong Kong), leveraged and inverse products accounted for roughly 30% of trading volume in the Korean market as of last September [E5]. That penetration rate sits alongside the exact regulatory response the Korean government later took: a suspension of new single-stock leveraged ETF issuance and a tripling of margin requirements, as reported by Technews [E12]. The scale of leveraged trading in Korea — nearly a third of market volume — is the backdrop against which regulators moved to intervene.

What exactly did the Korean government announce?

According to Technews, the Korean government announced on July 16 that it would suspend new issuance of single-stock leveraged ETFs, require investors to complete additional risk-management courses, and raise the minimum margin threshold for related products threefold — from the prior level to 30 million won — effective August 5 [E12]. The measure targets products tied to individual stocks rather than broad indices, and pairs a supply-side freeze (no new listings) with a demand-side friction (higher margin, mandatory training).

How does this connect to the recent market swings?

According to Technews, the Kospi index had already fallen about 25% from its June high before the regulatory action, and in the week preceding the announcement it moved through a single-day plunge of 16%, a rebound of more than 6% the next day, and then another 6% decline [E13]. The exchange had halted trading 37 times so far this year, versus just 3 halts in all of 2025, with more than half of this year's halts occurring after single-stock leveraged products listed in May [E14]. Technews also cites a Goldman Sachs estimate that SK Hynix (SK海力士)'s double-digit percentage drop on July 13 forced leveraged funds to sell roughly $5 billion in stock to rebalance their positions [E15]. That mechanical selling pressure matters structurally because Samsung Electronics (三星電子) and SK Hynix together make up about half of the Kospi's index weight, meaning sharp moves in either stock can drag the whole benchmark with them [E16].

How do Hong Kong and Taiwan's leveraged ETF markets compare?

According to a Cnyes report, Hong Kong's Securities and Futures Commission only approved conditional sales of ETF-structured leveraged and inverse products this past February [E7]. Samsung Asset Management (Hong Kong) subsequently listed four leveraged and inverse products tracking Korean and Japanese equities on the Hong Kong Stock Exchange, with a maximum leverage of 2x and a maximum inverse exposure of -1x, and a management fee of about 0.99% [E1][E3][E4]. The company's Hong Kong marketing director, Terence Poon, said the four products had already attracted roughly HK$100 million in institutional investor money [E2].

Taiwan's market shows a different growth pattern centered on a single, long-running product. According to a UDN report, Yuanta Taiwan 50 Bull 2X (元大台灣50正2, 00631L) became the first Taiwan leveraged ETF to surpass NT$100 billion in assets, reaching NT$101.6 billion on April 16 [E8]. From the start of the year through April 15, the fund took in NT$30.8 billion in net subscriptions, while its investor base grew by 94,000 people in the week ending April 10 [E9]. Since inception through March 31, 00631L had returned 2,016%, versus 352% for the Taiwan 50 Index over the same period — a multiple of 5.7 times [E10]. Average daily trading value also rose from NT$3.08 billion before a March 24 share split to NT$4.97 billion in the period after the split resumed trading through April 15 [E11].

What is the international history of leveraged and inverse ETFs?

According to a Cnyes report, the product category itself is not new: US ETF issuer ProShares first launched a lineup of six leveraged or inverse ETFs tracking major US stock indices back in 2006 [E6]. Two decades later, the same structure — applied not to broad indices but to single stocks in Korea's case — is now at the center of a regulatory intervention.

What this suggests

The evidence lays out a sequence rather than a single cause: leveraged and inverse products already made up about 30% of Korean trading volume before the crackdown [E5], single-stock leveraged listings arrived in May [E14], and trading halts subsequently jumped to 37 this year from just 3 in all of 2025, with the majority coming after that May listing [E14]. The mechanical link Technews cites — a $5 billion rebalancing sale tied to SK Hynix's single-day drop [E15] — sits alongside the structural fact that Samsung Electronics and SK Hynix jointly account for about half of the Kospi's weight [E16], which helps explain why volatility in two stocks could produce the 16%/6%/6% index swings reported in the same week [E13]. Against that backdrop, the Korean government's response — freezing new issuance and tripling margin requirements [E12] — targets the newer, single-stock segment specifically, a product category that Hong Kong only cleared for ETF structures this February [E7] and that Taiwan's decade-old, index-level 00631L has scaled to over NT$100 billion without the same halt pattern reported in Korea [E8][E14].