The Korean chipmaker’s shares surged 9.3% as high-bandwidth memory demand tightens supply amid AI infrastructure expansion.
SK Hynix became the third chipmaker to exceed a $1 trillion market capitalization, closing at 1,680 trillion won ($1.12 trillion) after a 9.3% gain. Intraday, its stock peaked at a 14.9% rise before retreating.
The company leads global high-bandwidth memory (HBM) revenue with a 57% share, outpacing Samsung and Micron. Quarterly profits surged fivefold, with demand projected to outstrip supply for the next three years.
The Kospi index climbed 2.3% on the session, driven by gains in Korean memory stocks. Year-to-date, SK Hynix shares have rallied 215%, trailing only Micron’s 245% advance.