Micron and SK Hynix Shares Slump as Investors Reassess AI Growth Outlook

Key Facts

Amid a broader reassessment of technology sector valuations, major memory chip manufacturers experienced a significant sell-off driven by concerns over the sustainability of the AI boom. According to reports, shares of Micron and SanDisk fell by more than 5% in US premarket trading, while SK Hynix shares plunged by 7.4%. This decline comes as investors begin to question the long-term growth assumptions tied to AI infrastructure demand that previously fueled the sector's outperformance.

These movements reflect mounting pressure on key suppliers of data center components, as market sentiment shifts regarding companies that were once top performers. Per market data, MU closed at $975.26 on September 11, 2026, while SKHY stood at $190.07 as of the same date. This collective retreat indicates a change in investor risk appetite toward a semiconductor industry that has seen accelerated growth in recent periods.

Traders are currently monitoring technical support levels after MU hit a day low of $967.38 during the September 11, 2026 session. With no immediate sector-specific catalysts in the upcoming economic calendar, focus remains on industry reports or policy statements that could restore confidence in demand trends. Caution prevails as the market seeks to determine if this slump is a temporary correction or the start of a broader downturn for AI-linked equities.