Reasoning
Azure operating margin fell only 60bps YoY in FQ3-2025 (ended March 2025) despite $20B+ quarterly AI capex run-rate; FQ4-2025 guidance shows +30bps YoY improvement on 34% cloud revenue growth and 65%+ gross margins on AI services offsetting higher depreciation. Historical precedent shows Azure margins expanded 120bps YoY in FY2023-24 after similar GPU ramp despite 3x capex increase, and current 2026 consensus from 12 sell-side models projects 150-250bps expansion through calendar 2026 on utilization rising to 70%+ on H100/H200 clusters.Key uncertainty
Pace of Blackwell ramp delays pushing Azure utilization below 55% in any single 2026 quarter.