South Korea's SK Hynix beat quarterly revenue and operating profit estimates, with demand from artifical intelligence remaining robust.

SK Hynix widened its lead in HBM, with a 70 per cent market share in the first quarter, Counterpoint Research said. Its HBM market share will remain above 50 per cent this year, with Samsung’s share falling to below 30 per cent and US rival Micron Technology’s share rising to almost 20 per cent, according to market researcher TrendForce.

The South Korean memory chip maker posted stronger-than-expected earnings for the first quarter on brisk demand for artificial-intelligence chips amid uncertainty about sweeping U.S. tariffs.