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SK Hynix Soars 12% on AI Data-Center Spending Optimism

Renewed faith in heavy demand for high-bandwidth memory lifts the chipmaker’s outlook.

The SK hynix logo appears in this illustration taken August 25, 2025. REUTERS/Dado Ruvic/Illustration/File Photo

Overview

  • Investors piled into SK Hynix after strong U.S. tech earnings pointed to ongoing spending on AI infrastructure.
  • SK Hynix is a leading supplier of high-bandwidth memory, a stacked chip that feeds data to AI accelerators at very high speeds.
  • Samsung lagged the sector as its union warned of an 18-day work stoppage starting May 21 unless a new agreement is reached.
  • Citigroup cut its outlook for Samsung and pointed to SK Hynix’s stronger standing due to a calmer labor situation.
  • Shares of other regional chipmakers, including MediaTek and ASE, also climbed as confidence in AI semiconductor demand broadened.