SK Hynix tops $900B market cap
- SK hynix shares hit fresh records in early May, pushing the South Korean memory-chip maker’s valuation above roughly $900 billion amid the AI trade. - The move followed a blowout March-quarter report: 17.6 trillion won in operating profit, 54.3 trillion won in cash, and management saying AI demand stayed strong. - It matters because HBM memory — not just GPUs — has become a core bottleneck in AI servers.
Memory chips are having their main-character moment. That is the real story behind SK hynix’s latest surge. The company did not suddenly become a consumer-tech giant overnight. What changed is that AI servers now need enormous amounts of very specialized memory, and SK hynix sits in one of the best spots in that supply chain. In early May, that pushed the stock to repeated record highs and lifted its market value into the same conversation as the world’s biggest chip names. ### Why is memory suddenly the hot part of AI? GPUs get the headlines, but they cannot do much without fast memory sitting right next to them. The crucial product here is HBM — high-bandwidth memory — which stacks DRAM vertically and feeds AI accelerators far faster than conventional memory can. That makes it one of the choke points in training and running large models. SK hynix has become one of the clearest winners because it is a leading supplier of HBM used in AI systems. (bloomberg.com) ### What actually changed for SK hynix this month? The stock kept climbing into May 2026 and printed new highs. Bloomberg summed up the backdrop neatly: Samsung and SK hynix had both more than doubled this year as investors chased companies tied to the AI chip buildout, and SK hynix was still outrunning even Samsung in the latest leg of the rally. Public market pages also showed SK hynix trading around 1.68 million won on May 11 after touching even higher intraday levels. (markets.ft.com) ### Did it really top $900 billion? That depends on the currency conversion and the exact moment you measure it. The cleaner way to say it is this: SK hynix’s valuation has surged into the upper tier of global chipmakers, and market trackers were not making up the move. Shares are up more than 400% over 12 months on some international listings, and the Korea-listed stock has been setting records. But the “$900 billion” line is best treated as an approximate, fast-moving threshold rather than a fixed official milestone. (bloomberg.com) ### Why were investors willing to pay up? Because the business numbers have been absurdly strong. In first-quarter 2026, SK hynix reported revenue of 17.64 trillion won and operating profit of 7.44 trillion won — sorry, that was the old scale investors were used to. The actual shock this cycle is bigger: the company said operating profit nearly doubled from the prior quarter to 17.6 trillion won, while cash and equivalents rose to 54.3 trillion won. (markets.ft.com) That told investors the AI boom was not just hype in orders — it was landing in margins and cash generation. ### Why is HBM the hard part? HBM is not commodity memory in a different box. It is advanced packaging, tight yields, close coordination with GPU makers, and brutal qualification standards. Think of it less like selling generic parts and more like being one of a tiny number of firms allowed to build the fuel system for a rocket. If demand spikes, supply does not magically appear next quarter. That scarcity is a big reason investors have re-rated the whole memory segment. (markets.ft.com) ### What does this mean for Samsung and everyone else? It means the AI hardware rally is broader than Nvidia. Samsung is still huge, and it has also rallied sharply, but SK hynix’s recent outperformance shows the market is rewarding whichever supplier looks best positioned in HBM right now. It also means memory is no longer the boring, cyclical side character in semis. For this phase of AI, memory is part of the platform. (markets.ft.com) ### So what is the catch? The catch is that memory has always been cyclical, and investors know it. Today’s pricing assumes AI demand stays strong, capacity stays disciplined, and SK hynix keeps its edge in next-generation HBM. If any of those slip, the stock can move the other way just as violently. But right now, the market is making a simple bet: AI still needs more memory than the industry can comfortably supply. (bloomberg.com) ### Bottom line This rally is really a repricing of memory’s role in AI. SK hynix is not being valued like an old-school DRAM maker anymore. It is being valued like a scarce infrastructure supplier for the AI buildout. (bloomberg.com) (markets.ft.com)
