SK Hynix's $1 Trillion Triumph Meets $43 Billion Reality Check: The AI Chip Supply Squeeze Deepens

SK Hynix breaches $1 trillion valuation on 405% profit surge from AI memory demand, but foreign investors sell $43 billion amid profit-taking concerns.

The South Korean memory chip giant has crossed the billion-dollar valuation threshold, but the celebration is already laced with caution. SK Hynix saw its market capitalization breach $1 trillion on June 2, 2026, with the stock closing at around 2,360,000 won. That marks a 248% gain since the start of the year and a more than tenfold total return for shareholders over the past twelve months. Yet the very next day, foreign investors dumped a net 60 trillion won — approximately $43 billion — over the preceding 18 trading sessions, with SK Hynix and Samsung Electronics accounting for 83% of those outflows. Analysts are calling it tactical profit-taking after a blistering rally, not a structural retreat from the semiconductor space.

The fundamentals behind the milestone are hard to argue with. In the first quarter of 2026, SK Hynix posted revenue of 52.6 trillion won, a near-tripling year-on-year, while operating profit surged 405% to 37.6 trillion won. That translated into an operating margin of 72% — a level that underscores the pricing power in the specialized memory segment. The engine is High Bandwidth Memory, or HBM, which now accounts for roughly 30% of total DRAM shipments and is projected to represent 41% of DRAM revenue by the end of the year. SK Hynix holds a 58% share of the HBM market, making it the indispensable supplier to Nvidia’s AI hardware.

No moment captured that dependence more vividly than at this week’s Computex 2026 in Taipei. Nvidia CEO Jensen Huang personally visited the SK Hynix booth and autographed an HBM4E wafer with the words “Please Make More.” The message was a direct plea for faster supply, as Nvidia’s upcoming “Vera Rubin” platform prepares for full production in the second half of 2026. SK Group Chairman Chey Tae-won responded by announcing a plan to double the company’s total wafer production capacity within five years, warning that the structural memory shortage could persist until 2030. Chey described the shift from a traditional chipmaker to a “AI factory” concept, reflecting the strategic pivot toward custom, high-margin memory solutions.

The ripple effects are reshaping South Korea’s entire equity market. The KOSPI hit a record high of 8,880 points this week and has doubled year-to-date, with SK Hynix and Samsung Electronics together representing roughly 50% of the index’s market capitalization. South Korea now ranks as the world’s sixth-largest stock market, ahead of India, the UK, and Germany. Goldman Sachs recently raised its 12-month KOSPI target to 12,000 points, citing what it called a “generational earnings boost” from semiconductors — a clear re-rating rather than a marginal adjustment.

Yet the foreign selling has introduced a note of suspense. Over the past 18 trading days, international investors have offloaded a net 60 trillion won worth of Korean equities, with the lion’s share hitting SK Hynix and Samsung. At the Frankfurt exchange, SK Hynix depositary receipts traded at €1,385.00 on Wednesday, a modest 0.72% gain on the day. Barclays has lifted its price targets, pointing to persistent tightness in the global memory supply chain and the company’s strong positioning for HBM4, the next-generation memory standard tied to Vera Rubin.

The competitive stakes are rising. SK Hynix and Samsung are already locked in a development race for HBM5, a technology that will likely determine market leadership through 2028. With real earnings and visible demand overhang supporting the valuation, the bubble warnings that accompany any tenfold rally are being met with counter-arguments rooted in numbers, not hype. For now, the wafer autograph and the record profits are telling the same story: the AI memory hunger is far from sated.