NEW YORK, January 2, 2026, 05:19 ET — Premarket
- Samsung Electronics shares jumped 7.2% in Seoul on Friday, closing at a record high and beating the broader KOSPI index.
- Executives pointed to customer praise for next-generation HBM4 memory chips used in AI systems, with Nvidia supply talks still a key watchpoint.
- Investors are looking for more evidence of HBM market-share gains and clearer profit signals heading into late-January earnings.
Samsung Electronics Co., Ltd. (005930.KS) shares surged 7.2% to a record close in Seoul on Friday after executives highlighted progress on its next-generation high-bandwidth memory chips used in artificial-intelligence servers. The KOSPI, South Korea’s benchmark stock index, rose 2.3% as chip names led the market higher.
The stock ended at 128,500 won, up 8,600 won on the day, as investors moved quickly to price in a stronger start to 2026 for Korea’s biggest chipmaker. Traders are also looking ahead to Samsung’s next earnings report slated for Jan. 29, according to Investing.com data.
The move matters because high-bandwidth memory, or HBM, has become a pressure point in the AI supply chain, where a small group of suppliers can win outsized profits if they qualify chips for leading customers on time. Samsung has been trying to convince investors it can close the gap after rivals moved faster in earlier AI memory cycles.
In a New Year address, co-CEO and chip chief Jun Young-hyun said customers had praised the competitiveness of Samsung’s HBM4 chips. “We have earned customer feedback that ‘Samsung is back’,” Jun said. Korea Joongang Daily
The rally in Samsung also arrived as global markets opened 2026 on an upbeat note, with investors leaning again into AI-linked stocks. South Korea and Britain both touched record highs, the AP reported, helped by gains in heavyweight technology names.
HBM is a type of stacked DRAM memory built to move large amounts of data quickly, which is why it is used alongside AI processors in data centers. HBM4 is Samsung’s next generation of that technology, and investors treat each generation shift as a make-or-break test of execution.
The near-term question for Samsung is less about lab performance and more about production: whether it can qualify HBM4 with big customers and ramp volume without sacrificing yields, which measure how many usable chips come out of each wafer. Weak yields can erase the margin benefit even when demand is strong.
Samsung’s foundry business adds another layer to the debate. A foundry makes chips designed by customers, and success there can diversify profits away from memory, but it also brings tougher competition and long qualification cycles.
Investors are also watching how Samsung manages cost pressures in components and the risk that tariffs reshape electronics supply chains. Those factors can hit both sides of the business, from chip equipment to finished devices, and they can change demand patterns quickly.
For now, traders will be looking for follow-through after the record close and for any new signals on customer wins tied to HBM4. A pullback would not be unusual after a sharp first-session move, but a steady bid would reinforce the idea that AI-related spending remains the market’s anchor theme early in 2026.
Peers are central to that read-through. SK Hynix remains the benchmark in HBM execution, while Micron is the other major rival investors watch for signs of tighter supply and stronger pricing.
