Alphabet Shares Fall Over 10% After Q3 Earnings Miss on Slowing Search Growth and AI Mode Monetization

What happened
Alphabet shares dropped over 10% in after-hours trading after third-quarter results revealed decelerating search advertising growth and negative cash flow driven by infrastructure costs.
The Context
- Search growth is slowing: Ad revenue in the core search business grew 12% to $63.4 billion, down from 19% in the first quarter, as Google's AI Mode generated lower revenue per query despite rising search volumes.
- Cash flow turned negative: Total revenue of $127.6 billion fell short of the projected $128.2 billion, while heavy spending drove negative free cash flow of $9.1 billion.
- Enterprise cloud doubled: Google Cloud delivered a strong bright spot, surging over 100% year-over-year to $30.71 billion as corporate demand for enterprise compute remained robust.
The Number
Alphabet's quarterly capital expenditure doubled year-over-year, signaling to operators that maintaining market leadership in artificial intelligence requires record cash outlays before unit economics mature.
Takeaway
Watch for enterprise tech leaders to increase ad load inside conversational interfaces over the next two quarters to balance record infrastructure budgets.
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