Samsung Electronics and SK Hynix signed artificial intelligence chip supply agreements with Nvidia and Broadcom over the weekend valued at a combined $950 billion, even as shares of both South Korean companies declined in Monday trading.

The market reaction highlighted a gap between the scale of new AI infrastructure commitments and recent share-price performance after a strong rally tied to demand for AI chips. For chipmakers, these agreements matter because AI data centers require large volumes of advanced memory alongside processors, making supply commitments a key part of how cloud and semiconductor companies plan future capacity.

SK Hynix Secures Large Nvidia-Linked Memory Deal

SK Hynix agreed to supply $750 billion in memory chips to Nvidia and other US companies over several years. Nvidia said its portion of the agreement was worth $500 billion. The supply arrangement is tied to new data centers targeted for 2027, while SK Hynix affiliate SK Telecom will develop a cloud business using Nvidia’s Vera Rubin systems.

Raj Mirpuri, Nvidia’s enterprise vice president, said the agreement would help secure a stable supply of high-bandwidth memory, or HBM, a specialized category of memory chips used in AI processors and graphics cards. HBM has become a closely watched part of the AI hardware supply chain because it allows processors to access data at high speed, a requirement for training and running large AI models.

Samsung separately signed a memorandum of understanding with Broadcom estimated at $200 billion. The companies said in statements Friday that the agreement would expand their collaboration in memory and foundry operations. Foundry work, which involves manufacturing chips designed by other companies, is another area where AI demand has increased attention on advanced production capacity.

Shares Slip Despite AI Supply Announcements

Despite the size of the announcements, SK Hynix shares traded at 1,752,000 won on Monday morning, slightly below Friday’s close and down 11.38% over five sessions. Samsung shares fell 0.50% to 248,500 won, extending a five-day decline of 10.05%.

Nvidia closed Friday’s session down 0.92% at $206.84 before moving slightly higher in overnight trading.

The subdued share-price response followed a pattern seen earlier this month, when SK Hynix shares declined despite positive news. US investors are also paying a premium for SK Hynix shares compared with Seoul-listed shares, a gap that emerged after the company’s blockbuster Nasdaq listing earlier in July.

Both Samsung and SK Hynix have risen sharply this year amid AI-driven chip demand. The latest moves suggest some traders were taking profits rather than adding exposure following another large AI-related announcement.

Samsung and SK Hynix are scheduled to report quarterly earnings later this week. The results will show whether rising chip orders are translating into profit and may offer investors more detail on the impact of the recent wave of AI supply deals, including how management teams describe memory pricing, capacity plans and timelines for AI-related demand.