Korea's KOSPI closed at a record 8,047.51 on May 26, 2026, gaining 199.80 points (+2.55%) for its first-ever close above the 8,000 mark, according to Chosun Biz's market wrap. The intraday high of 8,131 was also a record. The session ran one day before eight Korean asset managers simultaneously list the country's first single-stock 2x leveraged ETFs, all tracking just two underlyings: Samsung Electronics (005930.KS) and SK Hynix (000660.KS).
For a foreign investor reading the headline, the immediate question is sharper than "is this a top?" — it is: what does roughly ₩4 trillion ($2.9 billion) of new, pro-cyclical, retail-skewed leverage do to two stocks that together already dominate the index?
The launch, by the numbers
The Korea Exchange (KRX, Korea's main bourse operator) will list 18 single-stock products on May 27 — 16 ETFs and 2 ETNs — from eight asset managers: Samsung Asset Management, Mirae Asset Global Investments, Korea Investment Management, KB Asset Management, Hanwha Asset Management, Shinhan Asset Management, Kiwoom Asset Management, and Hana Asset Management, per Digital Today's English summary of the KRX listing notice. Each ETF tracks twice the daily return of either Samsung Electronics or SK Hynix.
Combined initial setup is the largest ever for a single ETF debut in Korea, per Chosun Biz: ₩1.75 trillion ($1.28 billion) across all Samsung Electronics 2x ETFs and more than ₩2.2 trillion ($1.61 billion) across the SK Hynix 2x ETFs, for roughly ₩3.95 trillion ($2.88 billion) total at launch. Samsung Asset Management alone accounts for about ₩2.4 trillion ($1.75 billion) — ₩1.0665 trillion on its KODEX Samsung Electronics product and ₩1.3665 trillion on its KODEX SK Hynix product, according to Seoul Economic Daily. Mirae Asset's TIGER pair totals about ₩1.3 trillion ($949 million), of which ₩329 billion ($240 million) was pre-secured from foreign investors — a record for a TIGER single-stock product, Mirae Asset ETF chief Kim Nam-gi told a May 26 Seoul press briefing reported by Asia Business Daily.
Fee competition is unusually aggressive at launch. Mirae Asset set the total expense ratio at 0.0901%, the lowest among comparable products per Digital Today; Samsung Asset Management's headline figure is 0.29% per Seoul Economic Daily. Samsung's KODEX line uses an in-kind subscription mechanism — a first for a Korean leveraged ETF — which it argues reduces monthly futures roll costs and captures dividend income.
Concentration meets leverage
The structural concern is mechanical. Samsung Electronics and SK Hynix together make up more than 47% of the KOSPI index, according to TradingKey's review of the launch — and these two stocks are now the only names that meet the KRX's eligibility thresholds (10%+ index weight and 5%+ average daily turnover) for single-stock leverage. With Korea's existing ±30% daily price limits, a 2x product can theoretically swing ±60% in a single session, the same TradingKey report notes — a risk Korean regulators explicitly flagged.
Demand looks ready to meet that risk. Investors must post a minimum ₩10 million ($7,300) margin and complete mandatory Korea Financial Investment Association training before trading. From April 28 through May 21, roughly 100,000 applicants enrolled and about 93,000 completed the course, per Seoul Economic Daily; TradingKey cites more than 140,000 registrations by May 25. Shinhan Asset Management, in its own product disclosure, recommends a holding period of "a maximum of one week."
The flow story behind the rally
Separately, Kakaopay Securities said its Repatriation Investment Account (RIA) — a tax-incentivized vehicle that channels proceeds from sold foreign stocks back into Korean equities for at least one year — passed 50,000 accounts in roughly 45 days since its March 23 launch. The top stocks sold inside those accounts were Nvidia and Tesla; the top stocks bought were Samsung Electronics and SK Hynix, per Chosun Biz's review of the broker's release. This is the visible flow narrative behind the rally: Korean retail rotating out of US AI mega-caps and into Korean memory.
Foreign flows tell a more divided story. Foreigners have been net sellers on the main KOSPI for 12 consecutive sessions and more than ₩40 trillion ($29.2 billion) on a month-to-date basis, while net buying ₩2.62 trillion ($1.91 billion) on the smaller KOSDAQ, according to Chosun Biz citing Korea Exchange data. Last week alone foreigners net sold Samsung Electronics and SK Hynix combined for more than ₩10 trillion, against an overall foreign net sell of ₩14.31 trillion. The ₩329 billion pre-commit into Mirae Asset's TIGER leverage product is, in that context, a tactical re-entry rather than a reversal.
The memory-cycle counterpoint
The rally has been spectacular: Samsung Electronics is up about 114% year-to-date and SK Hynix about 186%, with US peers Micron and SanDisk up roughly 141% and 156%, per CNBC figures cited by Newsis. CNBC's reporting also frames the bullish thesis explicitly — that AI-driven HBM demand has "structurally" broken memory's 3-to-4 year cycle. William de Gale of Bluebox Asset Management, quoted by CNBC, pushed back: "Memory is a fairly dreadful industry over the long term. Every time people argue that memory has now become a structurally value-creating industry, things have gone wrong."
The Korean won closed the day at 1,504.3 per US dollar, firming 12.9 won as Middle East ceasefire progress eased the dollar bid, per Chosun Biz.
What to watch
The near-term tell is not the May 27 opening tape — initial creation units guarantee high turnover — but the aggregate assets under management in single-stock leverage products by end-June and the realized tracking error after the June futures expiry, which Mirae Asset has flagged as the first real roll-cost test for the category. If AUM continues to grow into a memory-pricing wobble, the negative compounding drag that KRX warned about becomes the next headline, not the launch itself.
This article is for informational purposes only and does not constitute investment advice. All figures are as reported by the cited sources on or around May 26, 2026; USD equivalents use a reference rate of approximately ₩1,370 per US dollar except where the article specifies the day's spot close.
Sources
- Chosun Biz — KOSPI hits all-time-high, climbs 8,000-point peak, May 26, 2026
- Hankyung — KOSPI reclaims 8,000-point line, posts new closing high of 8,047.51, May 26, 2026
- Maeil Business — 20 days from 7,000, KOSPI breaks 8,000 too, May 26, 2026
- Asia Today — First-ever KOSPI 8,000 close; KRX chair Jeong Eun-bo calls it “a starting point, not a finish line”, May 26, 2026
- Electronic Times — KRX chair Jeong Eun-bo: KOSPI 8,000 is the starting point of a Korea premium, May 26, 2026
- Yonhap News Agency — 100,000 retail accounts queue for Samsung & Hynix 2x leverage ETF launch, May 26, 2026
- Newsis — KOSPI 8,047.51 close, first-ever break above 8,000, May 26, 2026
- Seoul Economic Daily — Samsung Asset Management to list largest-ever single-stock 2x ETFs, May 26, 2026
- Digital Today — Eighteen single-stock leveraged & inverse ETFs/ETNs on Samsung Electronics and SK Hynix to list May 27, May 26, 2026
- Asia Today — TIGER Samsung-Hynix 2x ETF draws ₩329 billion foreign creation order, May 26, 2026
- Chosun Biz — Kakao Pay Securities RIA retail accounts rotate from Nvidia & Tesla into Samsung & Hynix, May 26, 2026
- TradingKey — Korea’s first 2x single-stock leverage ETFs on Samsung & SK Hynix: launch primer, May 26, 2026
