Micron Posts 80% Revenue Jump on AI Memory Demand, Lifting Chip Sector Capex Outlook

Micron's results confirmed the shift from early AI infrastructure buildout to sustained production scaling. Management disclosed $9 billion in fiscal 2025 capex, with over 40% allocated to HBM3E and HBM4 capacity expansion. This marks the first quarter where AI-related memory contributed more than 25% of total revenue, outpacing legacy DRAM and NAND cycles.

The rally extended beyond Micron to names positioned for multi-year capex dominance. Qualcomm highlighted AI edge silicon demand while TSMC and Samsung face allocation pressure on advanced nodes. Data from industry trackers show memory bit growth now tracking above 20% annually, reversing the 2023 contraction and aligning with hyperscaler GPU deployment schedules through 2027.

Competing interests center on supply concentration versus margin capture. US export controls have accelerated domestic HBM investment by Micron and Samsung while raising costs for Chinese foundries. Primary earnings transcripts show Micron committing to 2026 HBM4 volume production, a timeline that locks in equipment orders with ASML and Applied Materials ahead of competitors.

Next phase hinges on whether bit supply growth outpaces AI accelerator attach rates. If Micron executes its stated capacity ramp, sector free cash flow inflection is likely by mid-2026; delays would extend pricing power for the current leaders.