Korean semiconductor stocks are on fire. SK Hynix shares rocketed over 9% to multidecade highs Thursday, while Samsung climbed 4% to levels not seen since early 2021. The surge comes after both companies signed on to OpenAI's massive Stargate infrastructure initiative, signaling a new chapter in AI's chip gold rush.
The Korean semiconductor sector just got its biggest validation yet in the AI arms race. SK Hynix shares exploded over 9% Thursday morning, reaching levels not seen in decades, while Samsung Electronics climbed 4% to its highest point since January 2021.
The catalyst? Both Korean giants have officially joined OpenAI's ambitious Stargate initiative, a move that positions them as critical suppliers in what could become the largest AI infrastructure buildout in history. According to market data from Seoul's KOSPI exchange, SK Hynix's rally represents its strongest single-day performance since the company's memory chip boom of the early 2000s.
The partnership couldn't come at a better time for Korea's chip industry. While Nvidia has dominated headlines with its AI processors, the real bottleneck in AI development has been memory and storage - exactly where Korean companies excel. SK Hynix already supplies high-bandwidth memory (HBM) chips that power many of today's AI systems, and Samsung brings massive manufacturing scale plus its own advanced memory technologies.
"This is about securing the picks and shovels of the AI gold rush," one Seoul-based tech analyst told local media Thursday. The Stargate project, first announced by OpenAI earlier this week, aims to build massive data centers capable of training the next generation of AI models. That means unprecedented demand for the specialized memory chips that Korean companies have spent years perfecting.
For Samsung, the timing is particularly sweet. The company has been struggling to match SK Hynix's success in AI-optimized memory chips, but the Stargate partnership offers a direct path into OpenAI's supply chain. Samsung's stock price had been stuck below its pandemic highs for over three years - until today.
Meanwhile, SK Hynix's surge extends a remarkable run that's seen the company become one of the world's top AI infrastructure plays. The chipmaker's HBM technology is already essential for training large language models, and OpenAI's massive expansion plans suggest that demand is just getting started.
The broader Korean tech sector is taking notice. Semiconductor equipment makers and other chip-adjacent companies saw modest gains in Thursday trading, suggesting investors expect the OpenAI partnership to create ripple effects throughout Korea's tech ecosystem.
