A profile of South Korea's SK Hynix, a once unloved memory chipmaker that now enjoys 58% operating margins and a ~$438B market cap amid the global HBM shortage
Once unloved SK Hynix is enjoying 58% operating margins amid a global shortage of memory chips
Context & Ripple Effects
SK Hynix’s re-rating had already begun when high-bandwidth-memory demand pushed it past a $100 billion valuation in 2024. The company’s later results showed that the opportunity was translating into earnings: record quarterly revenue and profit in early 2025 followed the rise in HBM demand.
The profile captures a shift in memory leadership rather than a one-quarter rebound. SK Hynix’s position as Nvidia’s principal HBM supplier disrupted the former pecking order among top-end memory makers, and subsequent record results reinforced the scale of that advantage.
First-order effects
- HBM scarcity gives SK Hynix unusual pricing power in a historically cyclical memory market, supporting the reported 58% operating margin and its valuation.
- Customers needing HBM face a more constrained supplier base, making access to qualified memory a near-term consideration alongside AI compute procurement.
Second-order effects
- Samsung and Micron are pressured to close the high-end HBM gap through product qualification and capacity execution, rather than competing only on conventional-memory scale.
- Elevated HBM prices can raise the memory component cost of AI systems, spreading the supply constraint from chip vendors to server builders and their buyers.
Third-order effects
- If HBM demand remains ahead of qualified supply, memory may retain a larger share of AI-infrastructure economics than in prior commodity-memory cycles.
- The episode suggests that advanced-memory leadership can reshape semiconductor rankings; the durability of that shift depends on rival qualification progress and new capacity.
The trend: AI infrastructure is turning high-bandwidth memory from a cyclical component into a strategic bottleneck with outsized influence on supplier profits and market power.