SK Hynix's U.S.-listed shares surged 14.59% in Thursday morning trading, climbing $18.50 to $145.29, as memory chip stocks across the board staged a sharp rally driven by warnings of tightening supply from rival Samsung Electronics and improving broader sentiment toward artificial intelligence infrastructure spending.

The rally in SK Hynix's American depositary receipts, traded on Nasdaq under the ticker SKHY, came alongside broad gains across the memory and storage chip sector Thursday. Micron Technology led the group higher, climbing 15% to $851.56, while SanDisk surged 22%, Western Digital jumped 18%, and Seagate Technology gained 16%, according to trading data. The Roundhill Memory ETF, which tracks the broader DRAM and memory storage sector, rose 13% during the same session, confirming that the rally extended across the entire memory and storage ecosystem rather than being confined to any single company.

The catalyst behind Thursday's rally traced back to comments from Samsung Electronics, which warned of tightening memory chip supplies, a signal analysts said could bolster pricing power for memory manufacturers broadly, including both Samsung and its rivals. Samsung's own quarterly earnings had already reflected the strength of current market conditions for memory chips, with the company reporting operating income of 89.2 trillion won, or roughly $62 billion, in its semiconductor division, more than 250 times higher than the prior........

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