Microsoft and Meta earnings deliver Wall Street's verdict on AI capex

Same night, same AI infrastructure story, opposite reactions. On July 29, 2026, Microsoft and Meta both reported earnings built on massive AI spending, and Wall Street rendered two very different verdicts.

Microsoft: the receipts

Microsoft reported $90.0 billion in quarterly revenue, up 18%, with Azure growing 43%. Annual Azure revenue topped $100 billion for the first time. Investors liked what they saw: shares jumped about 8% in extended trading.

The message the market took away is that Microsoft’s AI infrastructure spending is visibly converting into cloud revenue. Azure’s growth rate at that scale is the proof point that the capex machine feeds a revenue machine.

Meta: the bigger bill

Meta’s evening went differently. The company beat on revenue at $60.8 billion but missed on earnings per share, delivering $6.18 against $7.14 expected, after a $2.4 billion legal charge and a $1.2 billion severance charge. On top of that, Meta raised the floor of its 2026 AI capex guidance to $135-145 billion.

Shares fell almost 8% after hours. The revenue beat was not enough to offset a bigger spending commitment paired with a profit miss.

The new rule of earnings season

The context sharpened the contrast. The reports landed after a four-day chip rout wiped more than $1 trillion from semiconductor stocks, a stretch that had already put AI spending under a harsher spotlight.

The pattern that emerged from the two reactions is clear: investors are no longer paying for AI spending promises. They pay for proof that the spending converts into revenue. Microsoft showed the receipts. Meta showed a bigger bill.

That distinction will hang over every AI-heavy earnings call from here. A capex number that once read as ambition now reads as a question: where is the revenue this bought? Companies that can answer get rewarded, and companies that ask for more time get repriced.

Is $145 billion a year on AI data centers vision or burn? The market just showed it will decide case by case.