- SK Hynix crossed a $1 trillion market cap Wednesday — up more than 1,000% over 12 months — joining Micron (which hit the milestone Tuesday after a 19% single-day surge) and Samsung in the exclusive club of memory chipmakers now valued above $1 trillion.
- The three companies collectively control the global supply of high-bandwidth memory (HBM), the critical component that determines how fast AI chips can process data; SK Hynix alone held 57% of global HBM market share by revenue in Q4 2025.
- Investors and analysts expect memory shortages to persist through 2027, giving HBM makers unusual pricing power over Nvidia, AMD, and the hyperscalers — a structural shift that underpins the trillion-dollar valuations.
- Despite the run-up, SK Hynix still trades at just ~7x one-year forward earnings versus 27x for the Philadelphia Semiconductor Index — bulls argue there is significant multiple expansion still to come; bears warn the rally is built on earnings assumptions that any AI capex slowdown could quickly unravel.
What Happened?
SK Hynix shares jumped as much as 13% in Seoul on Wednesday, pushing its market capitalization above $1 trillion for the first time and making it the third Asian company to join the club after Samsung (which crossed the threshold earlier this month) and TSMC. The move followed Micron’s 19% single-session surge on Tuesday — its biggest one-day gain since 2011 — after a UBS analyst said the stock could double over the next year. The Korea Exchange briefly halted program buying as the Kospi jumped 5% on the wave of chipmaker enthusiasm. SK Hynix reported a five-fold jump in quarterly profit in April and has filed to list American depositary receipts in New York, which Barclays analysts say would act as a further catalyst by giving US investors direct access to the HBM trade. Single-stock leveraged ETFs tied to both SK Hynix and Samsung debuted on the Korea Exchange the same day, with the 2x SK Hynix product jumping 24% in early trading.
Why It Matters?
The memory chip sector has historically been treated as a commodity business — cyclical, capital-intensive, and perpetually prone to oversupply. What is happening now is a fundamental rerating: investors are beginning to price HBM makers as strategic infrastructure rather than commodity producers. That is because HBM is not simply another chip — it is the bandwidth layer that determines how fast AI models can run at inference, and supply is genuinely constrained by the complexity of stacking DRAM dies in 3D packages. SK Hynix’s 57% market share means it is effectively a co-equal partner to Nvidia in the AI infrastructure stack. If HBM shortages persist through 2027 as analysts project, these companies will have pricing power that the semiconductor sector has never seen before. The leveraged ETF launches add a speculative overlay that could amplify both upside and downside from here.
What’s Next?
Watch SK Hynix’s US ADR filing timeline — a New York listing would be a landmark moment for Korean equity market access and could pull in a wave of institutional capital that has so far had to access the trade via Korean exchange exposure. The key risk to monitor is any signal of AI capex deceleration from the hyperscalers: if Microsoft, Google, or Amazon trims data center spending guidance, HBM demand assumptions would need to be revised sharply lower, and stocks trading at euphoric momentum levels would be vulnerable. For now, though, the supply math is straightforward: SK Hynix’s own forecast is that HBM demand will exceed supply for the next three years, and it controls more than half the market.
Source: Bloomberg
