Daily Woody | Jun 26, 2026 — Korea's Fifth Circuit Breaker This Year
For the second time in three trading sessions, the Korea Exchange halted all trading on June 26 after the KOSPI plunged 8.19 percent to 8,198.33 around 12:10 p.m., triggering its fifth circuit breaker of 2026 and the eleventh since the mechanism was introduced. Samsung Electronics and SK Hynix, which together account for roughly half the index’s market value, each fell more than 9 percent intraday. The index sank as low as 8,126.84 before paring losses to close down 519.09 points, or 5.81 percent, at 8,411.21. The selloff followed a U.S. PCE inflation reading that climbed to 4.1 percent, a three-year high, reigniting fears of Federal Reserve rate hikes, compounded by profit-taking in chip stocks that had rebounded sharply over the prior two sessions.
The figures are not the story. The frequency is. Five circuit breakers in six months, three of them (June 8, 23 and 26) inside the past month, point to something the “profit-taking” explanation skips over: the market’s reaction speed itself has changed. With Samsung and SK Hynix making up about half of the entire KOSPI, and a wave of leveraged ETFs tied to those two names now listed, buy and sell signals are amplified in both directions at once. This is not a story about either company’s earnings. It is a market whose own design manufactures the volatility, a self-reinforcing loop that a single macro headline can set spinning.
Layered on top is a record pile of borrowed money. Margin-loan balances reached about 37.8 trillion won as of June 17, per the Korea Financial Investment Association, with the KOSPI portion alone near 29.8 trillion won, approaching 30 trillion for the first time. When the index drops sharply, under-collateralized accounts are force-liquidated, and that selling drives the next leg down, a vicious circle. Foreign investors have net-sold for six straight sessions, and Korea again missed MSCI’s developed-market watchlist this week. Until the chip concentration and the leverage unwind, the volatility may be here to stay.
What makes Korea a global signal, not just a local one, is that chip concentration. The country is the most leveraged single bet on the AI-memory trade in the world. When Wall Street wobbles on AI valuations, Seoul does not merely follow; it amplifies. For anyone watching where the AI trade breaks first, Korea is the canary.
| Date | Main trigger |
|---|---|
| Mar 4 | U.S.–Iran tensions |
| Mar 9 | Mideast oil-price spike |
| Jun 8 | Fed-hike fears, chip selloff |
| Jun 23 | U.S. tech weakness |
| Jun 26 | U.S. big-tech weakness, PCE shock |
The mechanism has been triggered 11 times in total; five of those fell in 2026 alone, nearly half in a single year.
A Seoul court on June 26 sentenced former first lady Kim Keon-hee to seven years in prison at first instance, finding her guilty of accepting luxury gifts in exchange for influencing government appointments. The court ruled she knowingly accepted about 103.8 million won ($68,000) in jewelry and other valuables, saying she used her position as the president’s spouse as “a means to pursue her private interests.” The sentence ran six months below the seven-and-a-half-year term prosecutors had sought. Kim, wife of ousted former president Yoon Suk-yeol, is already serving a four-year term for stock manipulation, with that case now before the Supreme Court.
President Lee Jae-myung’s job-approval rating slipped to 51 percent in a Gallup Korea poll released June 26, the lowest in Gallup’s polling of his term, with disapproval reaching 41 percent. Market volatility, housing prices and a weak won are cited as drivers. A separate Realmeter poll (June 15–19) had earlier put approval at 46.7 percent, its first reading below 50 for Lee, a reminder that figures from different pollsters are not directly comparable.
Twelve days after signing a ceasefire memorandum, Washington and Tehran are interpreting its central clause in opposite directions. The dispute is over how the strait carrying a fifth of the world’s oil will be run.
The United States and Iran declared a ceasefire agreement on June 14, but the two sides are offering conflicting readings of the Strait of Hormuz transit-fee question. President Trump says the strait will remain open and toll-free as before the war, while Iran’s foreign ministry insists the agreement enshrines its right to levy “maritime service fees” after 60 days. On June 25, the United States and Gulf Cooperation Council foreign ministers reaffirmed in a joint statement, issued in Manama, their opposition to any toll. The 60-day free-transit window expires in mid-August.
With the full text unpublished, both sides are reading the same clause in opposite directions. Tehran treats the “60-day free transit” provision as presupposing paid passage afterward; Washington calls it a normalization measure. If both readings genuinely rest on the document, the ambiguity was almost certainly engineered during negotiations, a clause designed to let each side claim victory at home.
Should a Hormuz toll materialize, the WSJ estimates Iran could collect up to $40 billion a year. Tehran points to Turkey’s service charges on the Dardanelles as precedent, yet legal scholars note that the international conventions Iran has signed make unilateral collection impossible. The sequence is telling: agreement declared (June 14), GCC statement against tolls (June 25), free-transit window expiring (mid-August). Before August arrives, the follow-on talks could become the next flashpoint.
A rare double earthquake flattened buildings around Caracas. With infrastructure already hollowed out by years of economic crisis, the scale of the disaster remains deeply uncertain.
A magnitude 7.2 earthquake struck Venezuela’s Yaracuy state on June 24 (local time), followed 39 seconds later by a magnitude 7.5 mainshock, the country’s strongest since 1900. Dozens of buildings collapsed in Caracas, including a 22-story tower in the Altamira district, and the port state of La Guaira was declared a disaster zone. The death toll rose from at least 188 (per Al Jazeera) to at least 235 on the health minister’s count, with more than 4,300 injured, while the USGS predictive model judges a death toll in the thousands most likely, with a substantial probability of exceeding 10,000. The United States, Mexico, Brazil and others have dispatched rescue teams, and Washington pledged $150 million in relief. With Venezuelan crude output down to roughly 700,000–800,000 barrels a day, the shock to global oil markets is expected to be limited.
The State Department has formally launched a multilateral framework to build AI-era supply chains among trusted nations, institutionalizing supply-chain alliances alongside chip export controls.
The U.S. State Department’s “Pax Silica” summit opened June 25 in Washington, D.C. The United States announced new cooperative initiatives and sought to expand membership in a framework aimed at building AI-era supply chains, covering semiconductors, rare minerals and data centers, among partners it deems reliable. Korea’s role in the framework is expected to be detailed later, a question of weight given that Samsung and SK Hynix anchor the global memory-chip market.
The vetting of the first IT-executive prime-ministerial nominee, a former Naver CEO, has wrapped. Whether she clears the hearing now moves to a floor vote on her appointment.
The two-day confirmation hearing for prime-ministerial nominee Han Seong-suk ran June 25 to 26. The opposition People Power Party pressed her on multiple-home ownership, an unauthorized structure, a personal-data leak at a startup program, and a sponsorship controversy, while the nominee repeatedly bowed her head, saying her property holdings “fell short of the public’s standards.” With all 11 witnesses requested by the opposition rejected, critics called it a “hollow hearing.” Unlike cabinet ministers, a prime minister requires a floor vote of consent in the National Assembly.
South Korea’s prime minister is appointed by the president but, uniquely among senior posts, requires majority approval by the National Assembly. If confirmed, Han would be the country’s first female prime minister in roughly two decades and its first drawn from the IT-founder ranks, signaling the Lee administration’s emphasis on an AI-driven growth agenda.
On the anniversary itself, a clash over security posture broke out at the prime-ministerial hearing. The date and the context overlapped pointedly.
June 25 marked the 76th anniversary of the outbreak of the Korean War. On that day, the hearing’s first, PPP lawmakers asked the nominee whether North Korea is the “main enemy,” while Democratic Party lawmaker Park Sun-won countered that invoking the term was inappropriate for someone who could one day hold inter-Korean summit talks should relations improve. The hearing continued into a second day on June 26, and the government held a separate commemoration.
A security-posture debate at a confirmation hearing on the war’s anniversary is not, in itself, unusual. What stands out this time is less the nominee’s answers than the way the two parties used the same date in entirely different political vocabularies. One side tests national identity with the word “enemy”; the other speaks of the possibility of diplomacy. As both vocabularies share a single calendar day, the moment shows how the memory of war is consumed in present-day politics.
Foreign investors net-sold KOSPI shares for six consecutive sessions from June 19 to 26. By Shinhan Securities’ tally, cumulative net selling over the six sessions reached about 15 trillion won, including more than 4.6 trillion won on June 26 alone. Korea’s renewed failure to enter MSCI’s developed-market watchlist this week has fed concerns that global passive funds may lower their allocation to Korean equities over the longer term. The won firmed 10.7 won to close at 1,532.0 against the dollar, after currency-authority verbal intervention.
Bottom line. Chip concentration, the MSCI snub and foreign outflows are converging, and KOSPI volatility will stay a fixture for some time.
MSCI, a major index provider, classifies Korea as an “emerging market” despite the size of its economy, citing limits on currency trading and foreign access. A developed-market upgrade would draw passive inflows; repeated rejections do the reverse, leaving Korean equities more exposed to active foreign selling.
Executives from Samsung Electronics and SK Hynix are set to attend President Lee’s “Korea Great Leap” national conference on June 29, where Samsung is expected to reveal a plan to invest 1,000 trillion won (about $647 billion) over the next decade to build semiconductor plants. Notably, the announcement did not lift the stocks; both fell more than 9 percent on June 26, as investors treated the looming good news as a “sell-the-fact” exit window amid liquidity-driven pessimism.
Bottom line. Even a record investment pledge could not offset macro fear, a reminder that in the current tape, flows are overpowering fundamentals.
Margin-loan balances stood at about 37.8 trillion won as of June 17, a record, per the Korea Financial Investment Association, up more than 10 trillion won from end-2025. The KOSPI portion alone, near 29.8 trillion won, is approaching 30 trillion for the first time. Per the financial regulator, the daily average of forced sell-offs (banpae) at the ten largest brokerages rose to 37.4 billion won in May from 10 billion a year earlier, roughly a 3.7-fold jump. When collateral falls short, holdings are liquidated automatically and that selling drives further declines, putting retail investors at the most vulnerable point of the chain in a volatile tape.
Bottom line. The more leverage piles up, the harder a selloff hits. The size of the debt may be a more dangerous signal than the index level.
Per the Korea Meteorological Administration’s 11 a.m. bulletin on June 26. Mostly clear nationwide today, with afternoon showers across inland southern Gangwon, the Gyeongbuk region and the central-eastern inland areas of Busan, Ulsan and South Gyeongsang. The weekend and early next week stay mostly clear, with temperatures rising.
| Today (26) | Sat (27) | Sun (28) | Mon (29) | |
|---|---|---|---|---|
| Sky | Mostly clear (E. showers) |
Mostly clear (S. clouds) |
Mostly clear (C. PM clouds) |
Partly cloudy |
| Low (℃) | 15–20.5 | 13–20 | 14–21 | 14–21 |
| High (℃) | 22–30 | 23–32 | 24–33 | 23–32 |
⚠ Expected shower rainfall (26th): 5–20mm across inland southern Gangwon, northern Chungbuk, Daegu-Gyeongbuk and central-eastern inland Busan-Ulsan-Gyeongnam. Watch for swell along the south and east coasts.
The KOSPI stopped trading again, three sessions after the last halt. Five circuit breakers this year, three of them in the past month. The market calls it “flows,” but rarely explains that the flows are made by leveraged ETFs riding two chip stocks. When a market with half its value in a single sector lists a wave of leveraged products, both the rallies and the routs grow larger. The volatility is not an outside shock. It is the design.
On the same day, Kim Keon-hee was sentenced to seven years at first instance. A court found that a president’s spouse accepted jewelry and paintings in exchange for influence over appointments. A market that had been setting record highs crashed in succession, and a court found corruption near the seat of power, on the same calendar day. It was a day that showed where Korea now stands.
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