Seoul’s leveraged ETF boom leaves KOSPI more volatile than bitcoin, regulators note
South Korea's benchmark index now swings harder than BTC, as single-stock leveraged ETFs on Samsung and SK Hynix draw scrutiny from regulators.
South Korea’s benchmark equity index has become measurably more volatile than bitcoin, a reversal that market regulators in Seoul are now examining as a byproduct of the rapid growth of single-stock leveraged exchange-traded funds tied to the country’s two dominant chipmakers.
Since the start of June, the KOSPI has moved an average of 3.8% a day, more than double bitcoin’s 1.7% over the same period, according to data cited by Protos. On a 12-month basis, the index’s annualised realised volatility has climbed to 57%, against 47% for bitcoin. One analyst told the outlet that, “compared to KOSPI, BTC has become a low-volatility asset.”
Circuit breakers and a swift reversal
The scale of the swings has been stark. The KOSPI set a record closing high of 9,114.55 on 22 June, only to fall 9.99% the following session, among the largest single-day declines in the index’s history. On Thursday it fell 6.4% to 6,820, triggering its 37th programme-trading halt of the year, a regulatory five-minute pause designed to restore order to disorderly markets.
Despite shedding roughly a quarter of its value since the June peak, the KOSPI remains, for now, the best-performing major equity market of 2026, up around 60% on the year and on track for a second consecutive year as the world’s top-performing benchmark among major economies. The rally, and much of the subsequent volatility, has been powered by global demand for artificial intelligence chips made by Samsung Electronics and SK Hynix, whose 12-month volatility readings of 78% and 90% respectively are levels previously seen only in speculative thematic stocks.
Leveraged ETFs amplify the swings
According to Crypto Briefing, the volatility has been sharpened by a wave of single-stock leveraged ETFs launched in South Korea since May 2026, most of them offering 2x daily returns on Samsung Electronics or SK Hynix shares. Retail investors have piled into the products, which require daily rebalancing to maintain their target exposure — mechanically buying more of the underlying stock as it rises and selling as it falls at the close of each session.
With Samsung and SK Hynix together accounting for close to 60% of the KOSPI’s total market capitalisation, the report noted that rebalancing flows across a dozen or more overlapping products have begun to move the wider index on their own. The index recorded just two trading days of moves greater than 5% in either direction during 2025; in 2026, that figure has already reached at least 20 sessions, according to the report.
Both South Korea’s Financial Supervisory Service and the Bank of Korea have publicly addressed the risks posed by the leveraged ETF sector, Crypto Briefing reported, though neither has yet announced concrete restrictions on the products.
Why it matters for crypto investors
For institutions that have long treated bitcoin as the riskier counterpart to conventional equities, the reversal is notable. It arrives as regulated bitcoin exposure through exchange-traded products and corporate treasuries has broadened across UK and European portfolios, lending the asset a steadier statistical profile even as a G20 equity market, propelled by leverage mechanics rather than fundamentals, now outpaces it in day-to-day turbulence.
Read more: JPMorgan flags Strategy’s $3bn cash buffer as a bitcoin resilience signal
