SK Hynix posted a 76% operating margin for Q2 2026, up from 41% a year earlier, driven by soaring demand for high-bandwidth memory (HBM) used in AI applications. Its operating profit reached 60.54 trillion won, approximately $41.7 billion, a 557% year-over-year increase. The South Korean chipmaker commands roughly 58% of the global HBM market, far ahead of Micron at 21%. Its gross margin climbed to 83%, a level more commonly seen in software businesses. Micron crossed the $1 trillion market cap threshold in May 2026.
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