Why Micron’s AI Windfall Isn’t Convincing Investors

Key Points:

• Micron reported a tripling of revenue and record-high memory margins, projecting $33.5 billion in revenue and 81% gross margins for the current quarter, yet its stock dropped 13% post-earnings due to investor concerns over sustainability.
• The company plans to more than double its FY26 capital expenditure to over $25 billion to meet AI-driven demand, especially for high-bandwidth memory (HBM4), which requires complex advanced packaging and reliance on external foundries, raising concerns about near-term free cash flow and margin durability.
• Samsung's vertically integrated model, combining logic design, base die fabrication, and HBM stacking in-house, poses a competitive threat by offering turnkey AI memory solutions and leveraging its foundry business, potentially narrowing Micron’s efficiency edge.
• Market fears of "Peak HBM" and rapid capacity expansions by competitors suggest that margin expansion may be nearing a ceiling, with supply expected to catch up by 2027, leading to potential price declines and explaining Micron’s stock drop.
• Despite cyclical risks, structural supply constraints in HBM, long qualification cycles, and multi-year contracts with hyperscalers provide some pricing durability, indicating that the market may be overly discounting Micron’s risk at its current valuation of about 7x forward earnings.