Micron before earnings: HBM demand, the AI boom and the future of the memory cycle

Micron Technology approaches its upcoming earnings print with a consensus narrative built around high-bandwidth memory (HBM) demand from hyperscaler AI infrastructure spending. FY2025 revenue came in at $37.4B, up roughly 49% year-over-year, with gross margins expanding to ~40% and diluted EPS of $7.59 — numbers that reflect a sharp recovery from the 2022-23 memory downturn and meaningful HBM mix-shift.

The bull thesis centers on Micron's ramp into HBM3E, where it is competing directly with SK Hynix and Samsung for AI GPU supply chains at NVIDIA and others. HBM carries significantly higher ASPs and margins than commodity DRAM, and if Micron is gaining share, the margin profile could continue to expand beyond the current 40% gross margin level.

The bear case is structural: memory remains a cyclical, capital-intensive commodity business. DRAM and NAND pricing outside HBM can deteriorate rapidly if PC/smartphone demand softens or if China's domestic memory producers (CXMT, YMTC) flood mainstream markets with subsidized supply. Micron's ~40% gross margin, while healthy, is still well below fabless peers and vulnerable to any pricing reversal.

Heading into the print, the key metrics to watch are HBM revenue as a share of total DRAM revenue, any guidance commentary on 2026 HBM capacity allocation, and whether NAND margins are stabilizing or rolling over. The stock's reaction will likely hinge on whether HBM growth guidance is revised upward or if management signals any supply/demand softness in conventional memory.