MU Stock Drops After Hours: Micron’s Heightened Capex Forecast Overpowers Q4 Beat, Expectation-Beating Q1 Guidance - Yahoo Finance

Micron's record-breaking Q4 results—$54.2B in revenue, 87% adjusted gross margins, and a Q1 FY27 guide of $61.5B—paradoxically triggered an after-hours selloff, underscoring a critical tension in the ... Read original →

The selloff isn't about the P&L—it's about the balance sheet's forward signal. Micron's 87% adjusted gross margin shatters the commodity pricing paradigm of memory, yet the structural FY2027 capex ramp, with cleanroom lead times of 18 to 24 months, implies concentrated capacity additions landing in H2 2028. This is not cyclical restocking; it is a capacity restructuring forced by the nonlinear bandwidth demand of agentic AI workloads on HBM. On the technology stack, HBM stacking is evolving from 8 to 16 layers, pushing TSV density and thermal management to make DRAM competition vertical rather than planar. SCAs lock in two-to-three-year hyperscaler demand, but if inference-side token consumption growth decelerates, those contracts become rigid capacity costs rather than demand hedges. Competitively, Samsung's MR-MUF packaging for HBM4, if it reaches volume production, directly threatens Micron's second-supplier position in NVIDIA's supply chain. SK Hynix will likely exploit the generational transition window to reclaim pricing leadership. Twelve-to-twenty-four-month projection: H2 2026 through H1 2027 is the golden margin window. From Q4 2027, cleanroom depreciation hits the P&L and competing capacity comes online—gross margins will likely compress toward 55 to 60 percent. The real alpha is not current EPS; it is who maintains structural HBM premium in the next downcycle. That depends on advanced packaging exclusivity, not wafer scale.