SK hynix
SK hynix makes the memory the AI era is bottlenecked on. The Korean chipmaker bet early on high-bandwidth memory — the stacked DRAM that feeds AI accelerators — and that bet made it the lead supplier to the GPU giants and, by revenue, a front-rank force in a market it once trailed. For most of its life it was reachable only through Seoul; a newly trading US ADR changed that, and this hub collects MEXC Learn's SK hynix coverage as the company steps onto the global stage. The coverage splits three ways. The business. Memory in three products: DRAM, where HBM — memory stacked and wired for bandwidth — became the AI boom's scarcest input; NAND flash and the SSDs built on it; and the packaging craft that stacking demands, which is where SK hynix's lead actually lives. Articles here cover how HBM works, why qualification at the GPU makers is the real moat, and how the Korean triangle with Samsung and the American third player, Micron, disciplines or floods the market. The listings. One company, two doors: Seoul-listed common shares and a US ADR. The differences — hours, currency, liquidity, withholding on dividends — are exactly the kind of thing that costs uninformed buyers money, so they get covered plainly. The cycle. Memory is the most cyclical business in semiconductors, and whether AI demand broke that cycle or merely supersized it is the entire SK hynix debate. Both cases are argued here at full strength, because the answer is genuinely unsettled.
SK hynix FAQ
It manufactures memory — DRAM and NAND flash — and it leads the world in high-bandwidth memory, the stacked DRAM bolted directly to AI accelerators. Every frontier AI chip is only as fast as the memory feeding it, which turned HBM from a niche product into the boom's scarcest input and turned its lead supplier into one of the most-watched companies in the AI supply chain.
High-bandwidth memory stacks DRAM dies vertically and wires them to the processor through thousands of connections, trading the distance data travels for raw throughput — exactly what AI training and inference are starved for. SK hynix bet on the format years before the AI boom, when it looked like an expensive niche, and arrived at the demand explosion with the yields, packaging craft and customer qualifications rivals are still chasing. Leads in memory are rented, not owned — but this one was earned early.
Two doors into one company. The primary listing is Seoul: common shares under code 000660, priced in won, trading Korean market hours. The US ADR — SKHY — is a depositary receipt representing the same underlying equity, trading in dollars on US hours, created after the company's 2026 US filing. Same business, different wrapper: the ADR adds convenience for dollar investors and a depositary layer, while Seoul remains where most of the liquidity and price discovery lives.
The most expensive question in semiconductors, honestly split. The broke-the-cycle case: HBM is sold on long-term agreements, eats DRAM wafer capacity, and ties demand to AI infrastructure buildouts rather than PC and phone cycles. The supersized-it case: memory makers respond to every boom the same way — capacity expansion — and this industry has never once resisted overbuilding into strong prices. Both cases are coherent. Position sizing is how you express which one you believe.
Two routes today. SK hynix stock futures — stablecoin-margined perpetuals tracking the value of one Seoul-listed share, with the won price converted to dollars — let you take long or short positions without a Korean brokerage account. And with the US ADR now trading, RealStocks access runs through that listing where available: actual SKHY shares via MEXC's licensed brokerage partner, funded in USDT. Confirm current availability of each in the app; jurisdiction eligibility applies to both.