Microsoft surges 22% in a week after $678B AI backlog revealed

Microsoft ↗ 0.52% posted its largest weekly gain in years after disclosing a commercial order backlog of $678 billion, an 84% increase from a year earlier, sending a clear signal to investors that demand for its cloud and AI services is outpacing supply. The stock climbed roughly 22% over the week ending August 1, following fourth-quarter fiscal 2026 earnings released on Wednesday evening.ts2+2

The rally was punctuated by a record-setting session on Thursday, when Microsoft shares surged about 16% and added nearly $450 billion in market value — the largest single-day gain ever recorded by a publicly traded company, surpassing Nvidia's ↘ 1.47% previous record of $441 billion set in April 2025.bloomberg+2

Backlog and Azure Growth Drive Confidence

The $678 billion in commercial remaining performance obligations represents more than two full years of Microsoft's annual revenue, which totaled $331.8 billion for fiscal 2026. Management said roughly 30% of the backlog would convert to revenue over the next 12 months, implying approximately $203 billion in near-term contracted sales.facebook+2

Azure revenue growth of 43% beat consensus estimates of about 40%, and guidance for the current quarter called for 45% growth on a constant-currency basis, exceeding the Street's forecast of roughly 41%. CEO Satya Nadella said Azure revenue "surpassed $100 billion for the first time," and the company opened 31 new data centers during the quarter.ts2+1

Diverging Fortunes Among Mega-Cap Tech

The results from Microsoft and Amazon Amazon.com, Inc. ↘ 2.24% — which jumped about 15% after reporting AWS revenue growth of 37%, well above the 31% consensus — contrasted sharply with Apple ↘ 0.80%, whose shares fell roughly 7.6% on Friday after the iPhone maker guided for 9% to 11% revenue growth, below the 12% analysts had expected.reuters+3

Amazon's earnings press release confirmed plans to spend $220 billion on capital expenditures in calendar 2026, underscoring Big Tech's commitment to AI infrastructure even as free cash flow turned negative on a trailing 12-month basis.aboutamazon+1

Risks Remain as Spending Accelerates

Microsoft's capital expenditures reached $41 billion in the quarter alone — 45.6% of revenue — while free cash flow fell 23% year over year. The company signaled first-quarter spending would top $50 billion. Executives projected that margin compression in fiscal 2027 would remain under one percentage point, but the pace of investment leaves little room for execution missteps.ts2

The Nasdaq Composite rose about 1.6% for the week, and the S&P 500 added roughly 1%, illustrating that Microsoft's move was a company-specific re-rating rather than a broad market surge.ts2