Daily Woody | Jun 23, 2026 — SK Hynix Dethrones Samsung, KOSPI Hits Record

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Top Story
SK Hynix Dethrones Samsung — the AI-Memory Crown Changes Hands
For the first time in roughly 25 years and seven months, Samsung Electronics is no longer Korea’s most valuable listed company. SK Hynix closed Monday up 5.61% at 2.919 million won, lifting its market value to 2,080 trillion won ($1.35 trillion) and edging past Samsung’s common-stock valuation of 2,066 trillion won. Samsung had held the top spot on the KOSPI without interruption since November 2000.
The two firms make the same product — memory — but their paths have split. SK Hynix, the dominant supplier of high-bandwidth memory (HBM) used by Nvidia and Google in AI systems, is up roughly 350% this year. Samsung, weighed down by phones, displays and a struggling foundry, has gained about 195%.
SK Hynix is also weighing a US listing of American Depositary Receipts as soon as August, a step that could widen access for global investors — a sign the shift may be more than a one-day event.
Between the Lines

This is not Samsung stumbling. It is the AI boom rewriting the hierarchy inside memory. Commodity DRAM once defined the business; now custom HBM does, and the company that bet on it leads. As Meritz analyst Kim Sunwoo put it, customized AI memory changed the industry’s economics and let SK Hynix take the lead. The reversal is stark for a firm that nearly sold itself to Micron in 2002 and posted a record loss in 2023.


But read the index, not just the headline. Samsung’s total value still tops SK Hynix once preferred shares are counted (2,246 trillion won). And two chipmakers now account for roughly half of the entire KOSPI. A market this concentrated rises on a narrow base: when one stock sneezes, the whole index catches cold. The crown changed hands — and so did the market’s single point of failure.

「Sources ↗」 Korea Times · The Elec · Reuters
Secondary
KOSPI Hits Record 9,114 — on Debt and Two Stocks
The KOSPI closed at 9,114.55 on Monday, up 0.69% and a record high, its first finish above 9,100. Retail and institutional buyers drove the move while foreigners sold 2.55 trillion won. The rally has a shadow: household lending at the five largest banks jumped more than 6 trillion won in under two months, with margin-loan and credit balances swelling as investors borrow to chase chip stocks. Korea’s central bank has warned that a pullback could force sell-offs and amplify volatility.
「Sources ↗」 Herald · Korea Economic Daily
Secondary
Ex-Justice Minister Gets 25 Years for Martial-Law Role
A Seoul court sentenced former justice minister Park Sung-jae to 25 years in prison and remanded him in custody for aiding the December 2024 martial-law attempt. The term exceeds the special counsel’s request of 20 years. The court found he convened ministry officials to weigh deploying prosecutors and checking detention capacity hours after the decree.
Korea Context

On Dec. 3, 2024, then-president Yoon Suk-yeol declared martial law for hours before parliament overturned it. He was later removed, and a cascade of trials has since convicted ministers and military officials — a slow legal reckoning still unfolding.

「Sources ↗」 Seoul Shinmun
🔄 Tracking: Iran talks · ongoing
U.S. and Iran Reach 60-Day Roadmap — and Seoul Watches Hormuz
A Gulf chokepoint and an oil price sit between this deal and the Korean market that just hit a record.
After an overnight session in Switzerland, mediators Qatar and Pakistan said Monday that the United States and Iran had agreed on a roadmap toward a final deal within 60 days. The sides set up a communication line for safe passage of commercial vessels through the Strait of Hormuz and a “de-confliction cell” involving Lebanon. Vice President JD Vance said Iran agreed to readmit IAEA inspectors. The first day had nearly collapsed: Iran’s delegation briefly walked out over a Trump social-media threat before the mediators pulled them back. Technical talks are set to continue in Switzerland through the week.
Between the Lines

What was signed is a framework for managing the conflict, not ending it. The roadmap promises 60 more days of talks; the hard questions — nuclear inspections, sanctions, frozen assets — move to working groups, not the page. Iran’s foreign minister called the Lebanon de-confliction cell the “first real test,” which is another way of saying the deal’s survival now depends on whether Israel halts strikes it insists it is not bound to stop.


For Korea, the line that matters runs through Hormuz. Traffic had recovered to 25 vessels on June 18 — the most since mid-April — before Iran moved to close the strait again over Lebanon, cutting it sharply (AXSMarine). A stable waterway keeps oil flowing and underwrites the risk appetite that lifted the KOSPI to its record. Seoul has no seat at this table, yet its energy bill and its stock index are both being negotiated in Bürgenstock.

「Sources ↗」 NBC News · CNN
Korea’s June Exports Jump 60% — Almost All of It Chips
The same force lifting SK Hynix is reshaping Korea’s trade ledger and the global memory supply chain.
Exports in the first 20 days of June reached $62.0 billion, up 60.4% from a year earlier — a record for that calendar window, customs data showed. Semiconductors did the heavy lifting: chip exports surged 188.4% to $25.5 billion and now make up 41.2% of all shipments. The trade surplus came to $17.5 billion. The figures confirm what the stock market has been pricing — that Korea’s export engine and its index increasingly run on a single industry.
「Sources ↗」 Financial News · Technobezz
Media shake-up. A Seoul court holds hearings Tuesday for five Joongang Group units, including broadcaster JTBC, cinema chain Megabox and producer Contentree, after the group defaulted — a stress test for Korea’s legacy media.
World Cup. Korea faces a must-win against South Africa on June 25 (Monterrey) to reach the round of 32, after a 0-1 loss to host Mexico left it second in Group A.
Another verdict ahead. Former first lady Kim Keon-hee faces a June 26 ruling on influence-peddling charges; the special counsel has sought seven and a half years.
Approval slips. President Lee Jae-myung’s approval fell to 46.7%, a fifth straight weekly decline and his first reading below 50% since taking office (Realmeter).

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