SK Hynix Inc.’s shares slid after record quarterly results failed to impress investors grappling with stagnant smartphone demand and questions about AI spending in 2025.

South Korea's SK Hynix forecast sales of its high-end semiconductors used in generative artificial intelligence chipsets would double this year after reporting a record quarterly profit that surpassed its bigger rival Samsung.

The result compared with an 8 trillion won average forecast by LSEG SmartEstimate, which is weighted toward analysts who are more consistently accurate. SK Hynix's quarterly opera