The $500B Infra Pledge That Reshapes HBM Demand — Korea's Semiconductor Beneficiaries
Big-tech's $500B data center commitment structurally elevates DRAM and HBM demand; SK Hynix, Samsung Electronics, and Hanmi Semiconductor valuations and the buy case examined.
Background
In early 2026, U.S. big-tech companies publicly committed to a combined annual capex of approximately $527B in data center and computing infrastructure: Microsoft $190B, Amazon $200B, Alphabet $180B+. Layered on top of that is the OpenAI–SoftBank “Stargate” consortium pledging $500B over four years — a figure that resets expectations for global semiconductor demand.
The transmission mechanism is direct. Higher computing density per data center rack translates to exponentially more High Bandwidth Memory (HBM) per GPU cluster. Nvidia’s H100 requires 80 GB of HBM3e; the B200 doubles that to 192 GB. Next-generation Blackwell Ultra and Rubin architectures are expected to require more than twice the HBM per chip again. Globally, SK Hynix holds over 50% of the HBM market and Samsung Electronics approximately 40%, meaning Korean producers collectively supply ~90% of the world’s HBM — a structural moat with no near-term parallel.
Nomura Securities in its May 2026 report reclassified Samsung Electronics and SK Hynix from “cyclical” to “structural growth” stocks, projecting memory demand could multiply thousands of times over the next five years. KOSPI crossed 8,000 earlier in 2026 but has since pulled back to the 7,100 range amid Samsung’s labor dispute and macro volatility — a correction that creates a re-entry window rather than a thesis change.
Why Now
Mid-May 2026 saw the semiconductor sector correct deeper than the KOSPI average. Samsung Electronics is navigating a wage dispute — the union demanding a 15% bonus allocation versus management’s offer of 10%+α — now on the brink of a general strike. SK Hynix saw the departure of a key executive credited with its HBM program. Both events compressed sentiment in the near term.
But demand-side fundamentals strengthened. Nomura maintained its targets: SK Hynix at 2,051,200 KRW (roughly $1,480 USD at 1,386 KRW/USD), Samsung Electronics at 342,400 KRW (~$247 USD). HBM3e supply shortage is broadly expected to persist through H2 2026, and the growing share of Long-Term Agreements (LTAs) in HBM contracts reduces supply uncertainty for producers. The current pullback appears to be multiple compression on temporary events rather than demand impairment — a distinction that matters for positioning.
The Buy Case
SK Hynix (000660)
- Current price: 1,819,000 KRW / ~$1,312 USD (May 15, 2026 close, FnGuide)
- Market cap: ~$93.4B USD (129.6T KRW)
- Trailing PER: 30.85x | 12-month forward PER: 5.50x
- PBR: 10.85x
- Analyst consensus target (25 firms): 2,051,200 KRW → ~+12.8% upside
- FY2025: Revenue +46.8%, Operating profit +101.2% YoY
The 12-month forward PER of 5.50x signals that earnings growth has already outpaced the stock’s appreciation — unusually low for the global memory sector leader in HBM. SK Hynix operates the HBM TC bonding process at scale and holds long-term supply agreements with Nvidia and Microsoft, providing meaningful revenue visibility. In the PHLX Semiconductor Index context, comparable U.S. memory names trade at 7–10x forward earnings; SK Hynix’s discount is notable.
Samsung Electronics (005930)
- Current price: 270,500 KRW / ~$195 USD (May 15, 2026 close, -8.61% on the day)
- Market cap: ~$172.5B USD (17.25T KRW, common shares)
- Trailing PER: 41.21x | 12-month forward PER: 5.80x
- PBR: 4.23x
- Analyst consensus target (25 firms): 342,400 KRW → ~+26.6% upside
- Foreign ownership: 48.69% | Dividend yield: 0.62%
Samsung trades at 5.80x forward earnings — near the low end of its historical valuation range — while carrying a net cash position and a dividend yield that provides downside cushion. The labor dispute has injected risk into H2 2026 HBM4 production ramp, which is priced in at current levels. If the dispute resolves before a strike, the risk premium lifts quickly. Investors gaining exposure to Samsung now participate in both the HBM4 ramp and a substantial DRAM business serving the server, mobile, and automotive markets.
Hanmi Semiconductor (042700)
- Current price: 369,000 KRW / ~$266 USD (May 15, 2026 close)
- Market cap: ~$25.4B USD (35.2T KRW)
- Trailing PER: 165.25x (vs. sector PER 102.28x)
- PBR: 49.04x | ROE: 34.76%
- FY2025 operating margin: 43.6%
Hanmi Semiconductor supplies HBM TC bonders — the equipment used to stack memory dies with thermal compression bonding. It holds a near-monopoly position in this segment. The valuation is high by any conventional metric, but an ROE of 34.76% and operating margins above 43% are unmatched in Korean capital goods. Structurally, every expansion of SK Hynix’s HBM production capacity requires additional TC bonders, making Hanmi a leading indicator of HBM supply growth. For investors who view HBM supply as multi-year constrained, Hanmi provides leveraged equipment exposure.
Risks
- Strike risk at Samsung: If Samsung’s labor dispute escalates to a full strike, HBM4 and server DRAM production ramps could be delayed into 2027, directly impacting memory supply timelines and Samsung’s near-term financials.
- U.S. trade policy: Ongoing semiconductor export controls targeting China could reduce legacy DRAM revenues for both Korean producers, where China remains a significant end market.
- HBM supply glut timing: Should Samsung’s HBM4 ramp succeed ahead of schedule in H2 2026, a sudden increase in supply could pressure HBM pricing and compress the margin premium that SK Hynix currently captures.
- Hanmi valuation risk: At 165x trailing earnings, Hanmi’s stock price embeds aggressive growth assumptions. Any quarterly miss relative to consensus is likely to trigger a sharp multiple derating — the flip side of high-ROE, low-float equipment names.