Record Valuation, Empty Shelves: Inside SK Hynix's $31 Billion Fab Dash and the Labor Fight That Could Trip It Up

South Korean memory maker SK Hynix sees zero inventory amid AI frenzy, stock up 186% YTD, plans massive capacity expansion to meet supply crunch through 2027.

SK Hynix has a problem most manufacturers would envy: it has nothing left to sell. Every last DRAM, NAND and HBM chip is gone from inventory, snapped up by a frenzy of AI-related demand that shows no sign of cooling. The memory maker's market capitalisation has ballooned to roughly $948 billion, putting a trillion-dollar valuation within striking distance and positioning South Korea to become the first country outside the US to boast two such tech giants alongside Samsung Electronics.

The stock closed at 1,745,000 won on Wednesday, an eye-watering 186.26% gain since the start of the year and a 58.33% advance over the past 30 days. Yet the euphoria has not been entirely smooth: a modest 11% pullback over the preceding week serves as a reminder that the run-up has priced in a great deal of future growth. With annualised volatility hitting 76.99% and the relative strength index at 68.9 — flirting with overbought territory — the air is getting thin at these altitudes.

To stave off the supply crunch, the company is throwing money at new capacity with unprecedented urgency. In the Yongin semiconductor cluster, the first clean room will open in February 2027, three months ahead of schedule, backed by an investment of around 31 trillion won. At full tilt, that single fab will churn out 350,000 additional wafers per month. The Cheongju site is also accelerating: the M15X line, which will produce the crucial HBM3E and HBM4 chips, is coming online two months earlier than originally planned.

The expansion is not just about volume but also about architecture. SK Hynix has started mass production of a new memory module called SOCAMM2, which delivers double the bandwidth while slashing power consumption. The module is purpose-built for Nvidia's upcoming Vera Rubin platform — a direct line into the most demanding AI workloads. Goldman Sachs has flagged the tightest supply squeeze in 15 years, and big tech names such as Microsoft and Google are reportedly offering pre-financing to secure future capacity. The desperation among hyperscalers is palpable.

That desperation is understandable given the numbers. In the first quarter, SK Hynix tripled revenue to nearly 53 trillion won and posted an operating margin of 72% — a staggering figure for a memory maker. Operating profit came in at 38 trillion won, validating the shift in perception from a cyclical commodity player to a central cog in the AI build-out. Analysts have responded with a flurry of target upgrades. Shinhan Securities doubled its target to 3.8 million won, JPMorgan raised its own to 3 million won on the back of long-term supply agreements, and SK Securities matched that 3 million won figure. UBS is more conservative at 1.7 million won.

The supply gap is expected to persist at least through 2027, with estimates pointing to a shortfall of roughly 45,000 wafers per month for AI memory alone. Year-on-year profit growth for DRAM is seen at 273%, while NAND is forecast to surge 292%. Bernstein predicts HBM revenue of about $7.5 billion in the second quarter, a 25% sequential jump, and the next leg — HBM4 — is being readied for ramping in the second half of the year.

Yet the boom is not without its fault lines. A labour dispute at P&S Logis, a logistics subcontractor, threatens to escalate. The union wants direct wage negotiations with the parent company, citing a stark disparity: workers received bonuses of just 5 million to 6 million won per person, while SK Hynix booked an operating profit of 45 trillion won. A recently strengthened "Yellow Envelope Law" broadens the definition of employer, potentially placing more legal responsibility on large contractors like SK Hynix. So far, no disruption to production has occurred, but the legal pressure is growing.

Foreign investors are voting with their feet. On the KOSPI, they have been net sellers for ten consecutive sessions, with cumulative outflows since the start of May reaching 44.4 trillion won. Domestic retail investors absorbed much of that selling, but at Mirae Asset Securities, top traders turned net sellers of the stock on Thursday — a shift that could signal a pause in the retail-driven momentum.

Meanwhile, the competitive landscape is shifting. Samsung Electronics, which already crossed the trillion-dollar market cap threshold this month, has reportedly passed final HBM4 quality tests at Nvidia and plans to start shipments this summer. However, Samsung’s production yield still hovers below 60%, while SK Hynix achieves around 80% on comparable chips. If the gap in yield persists, SK Hynix’s dominance in the AI memory market should remain intact.

For now, the market’s focus narrows to two variables: the trajectory of AI memory prices and the signing of long-term supply agreements. The next major catalyst is the HBM4 ramp in the second half. Any delay in that timeline — or an unexpected slip in yields — could rattle a stock that has already run far ahead of the fundamentals. The trillion-dollar moment is close, but the last few steps are the steepest.