Microsoft stock surged 16% on July 30 after the software giant’s fourth-quarter earnings report convinced investors that its massive spending on artificial intelligence is finally generating returns, adding roughly $450 billion to the company’s market value in the largest single-day gain in Wall Street history.
The company reported fiscal Q4 revenue of $90.01 billion, beating analyst expectations of $87.63 billion by $2.4 billion, with earnings per share of $4.74 versus the estimated $4.24. More significantly, Azure cloud revenue accelerated to 43% growth in constant currency, surpassing the 40.2% analyst consensus estimate.
Azure crossed $100 billion in annual revenue for the first time in the company’s history, a milestone that demonstrated the cloud platform’s dominance in enterprise computing. The achievement came as Microsoft’s Azure segment revenue hit $29.9 billion in the quarter, up from $20.9 billion a year earlier, according to analyst estimates. For the next quarter, management guided for 45% Azure growth, above the 41% analysts had expected.
The stock’s 16% jump represented its biggest single-day gain since October 2008, when it rose 19%, according to data compiled by Bloomberg. Reuters reported the move as the greatest-ever single-day increase for any company on Wall Street, eclipsing Nvidia’s $440 billion gain following President Trump’s tariff pause announcement last year.
Investor sentiment had been weighed down for months by concerns that massive capital expenditures across the technology sector—estimated at $190 billion for Microsoft alone in 2026—were not translating into revenue growth. Meta Platforms had reported a 91% drop in free cash flow earlier in the week, intensifying those worries. Microsoft’s strong guidance eased those fears, with analysts noting the company had demonstrated a clear path to revenue growth outpacing capital spending.
Jed Ellerbroek, portfolio manager at Argent Capital Management, told Reuters that Microsoft had moved itself “from the ‘battleground’ camp to be a ‘trusted AI winner’ stock” based on the earnings and forward guidance.
The earnings results also disclosed that OpenAI accounted for $24.1 billion in Microsoft’s fiscal 2026 revenue, with the AI company owing Microsoft $6 billion in accounts receivable. This transparency addressed investor concerns about the concentration of Azure’s growth in a single customer, with analyst estimates suggesting OpenAI was responsible for roughly half of Azure’s $30 billion year-over-year revenue increase.
Microsoft’s forward guidance signaled confidence in sustaining momentum. The company announced more than $50 billion in capital expenditures for the next quarter and made an accounting change extending the useful life of data center buildings to 25 years, up from 15 years, allowing it to report $175 billion in capex while maintaining $190 billion in actual spending plans.
Sources
- Bloomberg — Microsoft stock surge details, 16% gain, $450 billion market value increase, biggest single-day gain in market history
- Reuters — Stock jump over 15%, $450 billion market value addition, investor sentiment on AI spending, analyst commentary
- Fortune — 17% intraday surge, $483 billion market value addition, Azure $100 billion milestone, OpenAI revenue disclosure, analyst price targets
- CNBC — Earnings per share and revenue figures, Azure growth rates, capital expenditure guidance
- 247wallst — EPS beat percentage, revenue beat amount, earnings report date and figures
- Seeking Alpha — Earnings call guidance on Azure growth, quarterly revenue forecasts
- Investopedia — Earnings per share figures, revenue data, EPS growth percentage
