Microsoft (NASDAQ: MSFT) jumped about 8% in Thursday premarket — briefly adding well over $200 billion in market value — after its Q4 FY26 report late Wednesday cleared the one bar the market actually cared about: Azure is still accelerating, and the record AI spend behind it is already pre-sold.

The numbers that moved it

Revenue landed at $90.01B, up 18% YoY, ahead of the ~$87.6B Street estimate, and EPS was $4.74 versus the $4.24 expected. But the line doing the work was the cloud: Azure grew 43% in constant currency (analysts were near 40%) and crossed $100B in annual revenue for the first time. Microsoft's AI business is now running at a $37B+ annual run-rate, up roughly 123% YoY.

Why did that matter so much on this exact night? Hours earlier, Meta fell hard on the mirror-image fear — enormous AI capex, no visible payoff yet. Microsoft answered it with backlog. Commercial remaining performance obligations — contracts signed but not yet billed — jumped 84% to $678B, and even stripping out OpenAI's giant $250B Azure commitment, backlog still grew about 25%. In plain English: the spending is chasing demand that's already under contract, not hope.

The ripple

Follow the capex. Microsoft guided FY27 capital spending to roughly $255-260B, up from about $190B this year, with over $50B in the September quarter alone. That is a direct tailwind for Nvidia — Microsoft is one of its largest GPU buyers — and a welcome data-center read-through after this week's brutal memory-chip selloff. When Microsoft says it's spending more, Nvidia books more.

The one risk to watch

That same capex is the trapdoor. At $255-260B a year with free cash flow already tightening, Microsoft needs Azure to keep printing near-40% growth to justify it. Watch the next quarterly Azure number: if constant-currency growth slips toward the mid-30s while spend keeps climbing, the "spending machine that never slows" fear that clipped Meta on Wednesday snaps straight back to Microsoft.

As of ~05:00 ET / 14:30 IST, Thu 30 Jul 2026. Sources: CNBC, Benzinga, Seeking Alpha. For discussion and education only — not investment advice. Verify before acting.