The Day SK Hynix Joined the Million-Won Club
On February 26, 2026, the Korean stock market did something that would have seemed delusional a year ago. The KOSPI surged 3.67% in a single session, smashing through the 6,300 barrier and closing at a record high. Samsung Electronics hit 218,000 won per share — well above the psychologically significant 200,000 won level that analysts had been debating for years. But the real story was SK Hynix. The memory chipmaker’s stock crossed 1,099,000 won, making it what Koreans call a “hwangje ju” — an emperor stock, reserved for shares trading above one million won. SK Hynix’s market capitalization hit approximately $496 billion, surpassing Micron Technology, its closest American competitor.
I have been watching the Korean market since 2019, and I have never seen anything like this rally. The KOSPI is up over 45% in the past twelve months. Korea’s total stock market capitalization has surpassed France’s (and previously overtook Germany’s). Nomura, the Japanese investment bank, just raised its KOSPI target to 8,000 — a number that sounds outrageous until you understand the structural forces driving this rally.
HBM: The Three Letters Behind Everything
If you want to understand why Korean stocks are exploding, you need to understand three letters: HBM. High Bandwidth Memory is the specialized memory chip that powers AI data centers, and Samsung Electronics and SK Hynix together control approximately 80% of the global HBM market. Every time NVIDIA ships an H100 or H200 GPU to a hyperscaler like Microsoft, Google, or Amazon, that GPU needs HBM chips. And those HBM chips are overwhelmingly made by two Korean companies.
The global AI infrastructure buildout is the largest technology investment cycle since the internet itself. Microsoft alone plans to spend $80 billion on AI data centers in 2026. Google and Amazon are each spending comparable amounts. Every dollar of that spending generates downstream demand for Korean memory chips. SK Hynix committed $15.1 billion to a new HBM fabrication facility in Cheongju, South Korea, specifically to meet demand that is projected to grow 60% annually through 2028.
Samsung’s Comeback Story
Samsung Electronics was in a difficult position just eighteen months ago. Their HBM3 chips had failed Nvidia’s quality tests, handing SK Hynix a near-monopoly in the high-end AI memory market. Samsung’s stock languished while SK Hynix soared. The turnaround began in late 2025 when Samsung’s redesigned HBM3E chips finally passed Nvidia’s certification process. Since then, Samsung has been aggressively shipping HBM to both Nvidia and AMD, reclaiming market share that many analysts had written off.
The 218,000 won share price represents a roughly 90% gain from Samsung’s 2024 lows. Korean retail investors — the famous “gaemi” (ants) who move markets with their collective buying power — had been accumulating Samsung shares throughout the downturn, and they are now reaping the rewards. The phrase “Samsung was on sale” has become a common refrain on Korean investing forums like Naver Stock and PaxNet.
Beyond Semiconductors: The Broader Rally
While Samsung and SK Hynix are the headliners, the KOSPI rally extends beyond semiconductors. Hyundai Motor Group (Hyundai + Kia) has benefited from strong EV sales and their ambitious robotics program. Korean battery makers — LG Energy Solution, Samsung SDI, and SK Innovation — are riding the global EV transition. Korean shipbuilders like HD Hyundai Heavy Industries are experiencing a boom in LNG carrier orders as global energy trade routes shift.
The Korean won has also strengthened, which typically hurts export-dependent Korean stocks but in this case has attracted foreign capital. International investors are pouring money into Korean equities, drawn by the semiconductor story and relatively reasonable valuations compared to American tech stocks. The KOSPI trades at roughly 12-13 times forward earnings, versus 22 times for the S&P 500. For global fund managers looking for AI exposure at a discount, Korean stocks are the obvious answer.
The Political Dividend
There is an underappreciated political dimension to this rally. President Lee’s approval rating recently hit 58.2%, and Korean political analysts have noted a correlation between KOSPI performance and presidential approval. A rising stock market creates a wealth effect — Korean households that invested in Samsung and SK Hynix feel richer, spend more, and credit the government. Whether the government deserves credit for what is essentially a global AI demand cycle is debatable, but the political tailwind is real.
The government has also implemented several market-friendly policies, including the “Value-up Program” that encourages Korean conglomerates to improve shareholder returns through higher dividends and share buybacks. Samsung recently announced a 10 trillion won share buyback program — the largest in Korean corporate history — which has further supported the share price.
Is the Rally Sustainable or Is This a Bubble
The honest answer is: it depends entirely on AI demand. If the AI infrastructure buildout continues at its current pace — and every indication from Microsoft, Google, Amazon, and Meta suggests it will — then Korean semiconductor stocks have room to run. SK Hynix’s current valuation, while historically high, is actually reasonable relative to its earnings growth rate. The company’s operating margin in Q4 2025 was 48%, which is extraordinary for a hardware company.
The risk scenario is an AI spending pullback. If hyperscalers decide that their returns on AI investment are not materializing fast enough and cut data center spending, the demand for HBM chips would drop sharply, and Korean stocks would correct violently. This is not my base case — the competitive dynamics of AI practically force companies to keep investing — but it is the tail risk that every Korean equity investor should have in their mental model.
For now, the KOSPI at 6,300 feels like a milestone, not a ceiling. Nomura’s 8,000 target sounds ambitious but not impossible if the current trends hold through 2026. Korean investors, both institutional and retail, are experiencing something they have not felt in decades: genuine optimism about the Korean stock market. After years of the “Korea discount” — the gap between Korean stock valuations and global peers — the market is finally getting the recognition it deserves.
