Nvidia supplier SK Hynix's shares rally as mass production of latest HBM chips begins

SK Hynix shares jumped more than 9% on Thursday after the South Korean firm started mass production of the most advanced high-bandwidth memory (HBM) chips, pulling ahead in a race to meet demand from an artificial intelligence (AI) boom. Shares of the world's second-largest memory chipmaker outperformed its bigger rival Samsung Electronics, whose shares rose 4%, also boosted by the bullish outlook for AI demand from Micron overnight.