Google Cloud Doubled. So Why Did Alphabet Shares Fall 10%?
Alphabet’s AI business is booming, but weaker advertising growth and mounting infrastructure costs have investors questioning how much of that growth will translate into profits.
TL;DR
- Google Cloud is booming. Revenue surged 103% to US$30.7 billion and its operating margin rose to 36.2%, but Alphabet still missed Wall Street’s overall revenue and earnings expectations.
- Investors are worried about two things: slower advertising growth and the enormous cost of building AI infrastructure, which pushed free cash flow to –US$9.1 billion. Alphabet shares fell approximately 10% after hours.
- The bigger question is whether AI strengthens or disrupts Google’s core business. Cloud is growing rapidly, but Search still provides much of the cash needed to fund Alphabet’s AI ambitions.
Google’s AI business is growing at an extraordinary pace.
In the third quarter, Google Cloud revenue more than doubled, helped by demand for AI infrastructure, enterprise services and Google’s own custom chips.
Yet shares of parent company Alphabet fell approximately 10% in after-hours trading following Wednesday’s earnings announcement.
Why?
Because investors are increasingly concerned about what AI growth costs — and what it could mean for the business that made Google so profitable in the first place.
The Numbers: Strong Growth, Disappointing Earnings
Alphabet reported quarterly revenue of US$127.6 billion, up 25% from a year earlier.
That is substantial growth for a company of its size. But it fell slightly short of analysts’ expectations.
Earnings were a bigger disappointment.
Q3 2026 vs expectations
EPS is as reported; adjusted for investment losses, EPS was US$2.67. Expectations per LSEG and analyst consensus.
Net income declined 25% to US$26.2 billion.
Much of that decline reflected an approximately US$8.7 billion loss on Alphabet’s equity investments. Operating income actually rose about 30% to US$40.6 billion.
The results exposed a growing divide within Alphabet: its AI-related cloud business is expanding rapidly, but that growth is not yet translating into stronger cash generation.
Google Cloud Is Becoming a Much Bigger Business
Google Cloud was the clear bright spot.
Revenue increased 103% year on year to US$30.7 billion, driven by demand for computing infrastructure, enterprise AI applications and traditional cloud services. Its operating margin rose to 36.2%, from 23.7% a year earlier.
Its backlog reached US$561 billion, with management expecting more than half to be recognised as revenue over the next two years.
to US$30.7 billion
up from 23.7% a year earlier
just over half expected as revenue within two years
Another important development is Google’s custom AI chips.
Its Tensor Processing Units, or TPUs, are increasingly contributing to cloud revenue through sales of integrated computing systems.
This gives Alphabet an opportunity beyond selling cloud services: it can also supply the specialised infrastructure that other businesses need to develop and operate AI.
The demand is encouraging.
But investors still need to know how profitably Alphabet can fulfil these orders.
The Problem: Search Growth Is Slowing
Google’s advertising business remains the financial foundation of Alphabet.
It generated approximately US$82 billion in third-quarter revenue, but missed analysts’ expectations by US$1.4 billion.
Management said currency movements were the biggest factor in slower Search growth, but the rapid rise in AI Mode usage also had an impact because AI Mode, Google’s conversational search experience, currently earns less from advertising.
This creates an uncomfortable question.
Traditional Google Search is an extraordinarily profitable advertising business. Users enter queries, receive results and click on sponsored links.
AI-powered search changes that experience.
Instead of browsing multiple websites, users can receive direct answers through a conversational interface.
That may improve the product. But it also changes how Google can display advertising and earn revenue.
Alphabet is experimenting with advertising within AI Mode and plans to expand those efforts internationally.
For investors, the question is whether Google can make AI-powered search as commercially successful as traditional Search.
AI Spending Is Starting to Bite
The other concern is cash flow.
Alphabet reported negative free cash flow of US$9.1 billion in Q3, following negative US$5.9 billion in the previous quarter.
This is a significant change for a company historically known for generating enormous amounts of cash.
The reason is its infrastructure expansion.
Alphabet is spending heavily on data centres, computing equipment and AI chips to meet demand from customers and support its own products.
Management expects capital expenditure of approximately US$195 billion to US$205 billion in 2026, with spending increasing further in 2027.
That investment may create substantial future revenue.
But it also introduces risk.
Data centres require years of investment, while AI computing equipment can become outdated relatively quickly. Higher depreciation, energy costs and infrastructure expenses could weigh on future profits.
The challenge is not simply generating AI demand. It is generating enough profitable demand to justify the spending.
What Does the Share-Price Decline Tell Us?
Alphabet’s approximately 10% after-hours decline suggests investors are becoming less willing to reward AI growth without evidence of attractive financial returns.
Google Cloud’s performance was impressive, but it could not offset concerns about Search and cash generation.
This is particularly important because Alphabet’s investment case rests on two businesses with very different economics.
Search is an established, highly profitable business facing disruption from AI.
Cloud is a rapidly growing business benefiting from AI, but requiring enormous investment to expand.
The opportunity is that Google could succeed in both.
The risk is that the cost of building its AI future begins to erode the profitability of its existing business.
The share-price reaction does not establish which outcome is more likely. It shows that investors are demanding stronger evidence.
THE EDIT
Alphabet’s results reveal one of the most important questions facing Big Tech: Can companies build profitable AI businesses without undermining the cash-generating businesses they already own?
For investors, three developments are worth watching.
1. Can Google monetise AI Search as effectively as traditional Search? More users engaging with AI Mode is encouraging, but the real test is whether advertising revenue per user remains strong. If AI changes how people search without delivering comparable advertising economics, Google’s most valuable business could face pressure.
2. Will Google’s cloud backlog turn into attractive profits? A US$561 billion backlog provides visibility into future revenue. But fulfilling those commitments requires substantial investment in chips, data centres and electricity. Investors should monitor cloud operating margins alongside revenue growth.
3. When will free cash flow recover? Two consecutive quarters of negative free cash flow are notable for a company of Alphabet’s scale. Rising AI investment may be justified, but investors need to see a credible path towards stronger cash generation.
Google has demonstrated that it can compete in AI. The harder question is whether it can make AI more profitable than the businesses it is changing.
All financial figures are in US dollars. The share-price movement refers to after-hours trading following Alphabet’s Q3 2026 earnings release on 28 October and may differ from the subsequent regular-session close. This article is for general information and education, not personalised investment advice.
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