SK Hynix’s Nvidia Alliance Extends to Digital Twins as HBM4 Fab Spend Hits $44 Billion Won — Shares Still Plunge 7.7%

SK Hynix becomes Nvidia's primary memory partner for Vera Rubin, RTX Spark, and Jetson Thor, while KOSPI crashes 8.29% on rate fears.

On a day when South Korea’s benchmark KOSPI index collapsed by 8.29%, triggering a 20-minute trading halt, SK Hynix went ahead and locked in one of its most expansive partnerships yet with Nvidia. The memory maker is now Nvidia’s primary memory partner for four upcoming hardware platforms — from data-centre accelerators to robotics — and will use Nvidia’s software stack to build digital twins of its own factories.

The collaboration, sealed during Nvidia CEO Jensen Huang’s visit to Seoul on 8 June 2026, covers custom memory solutions for the Vera Rubin accelerator (first shipments due in the third quarter of 2026), the Vera CPU, the RTX Spark AI PC line, and the Jetson Thor robotics platform. Huang described SK Hynix as Nvidia’s "largest partner" in memory, reinforcing a relationship that now stretches well beyond simple chip supply.

To scale up HBM4 production for Nvidia’s next architecture, SK Hynix has placed a 44.2 billion won order with Hanmi Semiconductor for roughly 15 specialised chip-stacking machines. The equipment will go straight into the M15X facility in Cheongju, where HBM4 chips have been rolling off the line since September 2025. The company already controls 53% of the high-bandwidth memory market, and analysts expect that share to climb to 60-70% for HBM4 volumes destined for Nvidia from late 2026.

Perhaps the most unusual element of the agreement is the software dimension. SK Hynix will integrate Nvidia’s CUDA-X libraries and PhysicsNeMo simulation tools into its chip design and manufacturing process, and it plans to build "Fab Digital Twins" — virtual replicas of its fabrication plants running on Nvidia’s Omniverse platform. The stated goal is fully autonomous factory operations and higher yields for the high-bandwidth memory that powers AI workloads.

Yet the news was completely overshadowed by a brutal sell-off in Seoul. Strong US jobs data reignited fears of higher-for-longer interest rates, sending the KOSPI down 8.29% — enough to trigger circuit breakers for the first time in months. SK Hynix shares closed at 1,911,000 won, a daily loss of 7.68% and a 19% decline over the past week. Intraday losses had been even sharper before the Nvidia announcement helped stabilise sentiment.

Despite the rout, the stock remains up more than 182% year-to-date. NH Investment Securities has set a price target of 3.2 million won, citing sustained HBM4 demand and stabilising DRAM spot prices.

Meanwhile, SK Hynix is pressing ahead with plans for a US listing. Roadshows for a potential American depositary receipt issue have reportedly generated "extremely positive" feedback, and the offering could raise up to $14 billion at a targeted market capitalisation of more than $1 trillion. Whether the ADR debuts in 2026 will depend on how quickly global market sentiment recovers from this month’s sell-off.

On the ground in South Korea, the broader ecosystem is also moving. SK Telecom, a sister company, is building a massive AI cloud that is expected to go live in 2027. For now, SK Hynix’s investors are left weighing a transformative Nvidia deal against a market environment that can wipe out almost a fifth of a stock’s value in a single week.