SK Hynix Locks 70% of Nvidia's Vera Rubin HBM4 Supply

The Vera Rubin Catalyst

Korea Economic Daily reported on March 8 that Samsung and SK hynix have been confirmed as the sole HBM4 suppliers for Nvidia's Vera Rubin, the company's next flagship AI accelerator slated for second-half 2026. Micron has been excluded from the top-tier Vera Rubin entirely — it may supply HBM4 for mid-tier Rubin CPX accelerators, but not the flagship.

The allocation split heavily favors SK hynix at roughly 70%, with Samsung holding the remaining 30%. Each Vera Rubin GPU will incorporate 8 HBM4 stacks totaling 288 GB, and the full Superchip — two GPUs combined — will pack 576 GB of memory. Samsung passed Nvidia's qualification tests for both 10 Gbps and 11 Gbps variants and began limited shipments in February. SK hynix is optimizing for the 11 Gbps test and expects full-scale production this month.

Nvidia is expected to formally unveil Vera Rubin at GTC on March 16, which gives the market another potential re-rating event in a week.

Caught Between a Supercycle and a War

The timing of this catalyst matters. SK hynix shares have been hammered roughly 20% since U.S. strikes on Iran began, dragged down by the worst KOSPI rout since 9/11 — a 12% single-day crash on March 4 following a 7.2% drop the day before. South Korea sources around 70% of its crude from the Middle East, and Iran's closure of the Strait of Hormuz has made Korean equities ground zero for the energy shock trade.

The KOSPI staged a dramatic 10%+ recovery on March 5 on reports of secret Iranian diplomatic outreach to the CIA, but gave back 6.2% on Monday March 9 as the conflict remained unresolved. Against that backdrop, the SKHX perp ripping 15% is notable — it suggests traders are separating the company-specific HBM4 catalyst from the macro noise, at least on the 24/7 perp market where the news can be priced in before KRX opens.

The fundamental picture underneath the geopolitical chaos remains extremely strong. SK hynix commands 62% of the global HBM market. All DRAM, NAND, and HBM production through 2026 is sold out. Morgan Stanley raised its 2026 and 2027 earnings forecasts by 56% and 63% respectively, projecting DRAM prices up 62% and NAND prices up 75% in 2026.

What GTC Unlocks

The March 16 GTC keynote is the next inflection point. If Jensen Huang formally unveils Vera Rubin with the specs reported — 288 GB HBM4 per GPU, 576 GB per Superchip — it validates the supply deal and gives the market concrete numbers to model HBM4 revenue for SK hynix's 70% share.

The broader context adds weight. SK hynix is already building data centers in Korea with OpenAI and Samsung as part of the Stargate initiative. BofA estimates the 2026 HBM market at $54.6 billion, up 58% year-over-year, and Goldman sees HBM demand from custom ASIC-based AI chips alone jumping 82%.

The Iran situation remains the unresolved variable. If the KOSPI selloff deepens on Monday, the question is whether the Vera Rubin catalyst is strong enough to make SK hynix a relative outperformer even in a risk-off tape — or whether macro gravity pulls it back down with everything else. The perp market is betting on the former.

Trading on Hyperliquid

Trade SKHX on Hyperliquid with up to 10x leverage.