Microsoft (MSFT) shares surged 16.6% today, their sharpest one-day gain since October 2008, after fourth-quarter results settled the market’s biggest AI argument of the earnings season.
Azure crossed $100bn in annual revenue for the first time in fiscal 2026, with growth accelerating to 43% in the quarter, comfortably ahead of the roughly 40% analysts had pencilled in.
But can this rally hold, or has Wall Street simply been starved of good AI news? The numbers behind today’s move suggest there is substance here, not just relief.
Fourth-quarter revenue reached $90.0bn, up 18% year on year and comfortably above the $87.6bn consensus. Diluted earnings per share came in at $4.81 on a GAAP basis, up 32%, while the adjusted figure of $4.74 still beat forecasts nearer $4.24.
Full-year revenue reached $331.8bn, up 18%, with net income climbing 31% to $133.7bn. For a company already valued near $3trn, the scale of that beat is what makes the market’s reaction so significant.
Azure Growth Becomes the Main Event
Azure’s acceleration was the attention grabber from these results. Growth quickened from 40% the previous quarter to 43%, its fastest pace in four years, while Microsoft Cloud revenue overall reached $59.3bn, up 27%.
Commercial remaining performance obligations, essentially contracted future revenue, rose 84% year on year to $678bn. Microsoft said the latest sequential growth came from customers outside the small group of frontier AI developers, evidence that demand is broadening beyond a handful of deep-pocketed labs.
Capex Concerns Ease After Spending Surge
The obvious counterweight was spending, with capital expenditure climbing 70% year on year to $41bn, pushing free cash flow down 23% to $19.6bn.
Yet that figure came in below the $42bn some analysts had feared, and full-year capex guidance was left unchanged once a lease accounting change was stripped out. That restraint, set against Alphabet’s decision to lift its own capex outlook to $205bn, was arguably the clearest reward handed out this earnings season.
OpenAI Partnership Remains the Biggest Risk
The OpenAI relationship remains the trickiest variable in the investment case. Microsoft booked a $3.2bn gain from its Anthropic stake this quarter, and its extended OpenAI partnership secures Azure commitments and intellectual property rights through 2032.
Even so, OpenAI has already signed cloud deals with both Amazon and Oracle, and some analysts estimate it accounted for roughly half of Azure’s incremental growth this year. Any slowdown in that relationship, or faster diversification away from Azure, would remove a meaningful swing factor from future results.
Valuation Leaves Room for Further Gains
On valuation, Microsoft now trades at close to 22 times forward earnings, down from levels above 28 times earlier in the year and near its cheapest multiple since 2023.
Analyst consensus sits at Strong Buy, with an average 12-month price target above $555, implying further upside even after today’s move.
This was the quarter that answered the market’s central question of 2026, whether years of AI infrastructure spending would ever show up in the numbers. Azure’s acceleration, the broadening customer base, and disciplined capex guidance all suggest that it finally has.
I would not chase the shares blindly after a 16% single-day move, but the fundamentals behind this rally look considerably more durable than the scepticism that dominated the first half of 2026. The risk-reward profile now looks more balanced than it has in months, tilted towards the bulls.
