Investors are getting nervous about AI infrastructure spending just as the Big Tech companies double down. Over the past two weeks, Alphabet, Amazon, Meta, and Microsoft have outlined plans to spend more than $740 billion on capital expenditures this year, which Wall Street is reading as AI infrastructure spending, including data centers and chips. Only Microsoft escaped the free cash flow squeeze.
Key Results at a Glance
- Market reaction: The Nasdaq fell 2.9% on Friday. Nvidia dropped 4%, Broadcom more than 5%, and Qualcomm 11%.
- Alphabet: Its stock plummeted 12% on Thursday, its worst day on record, wiping out $500 billion in market value, and it fell again Friday. Q3 free cash flow was negative $9.1 billion, the second consecutive quarter in the red. Quarterly capex grew to $51.4 billion, and it expects to spend up to $205 billion this year.
- Amazon: Free cash flow was negative $42.4 billion over the past 12 months, versus $14.8 billion positive the year before. It expects $220 billion in capex this year. The stock tumbled 7% despite AWS revenue growth of 39%.
- Meta: Q3 free cash flow was negative $2.1 billion. It is guiding to as much as $145 billion in capex this year. Ad revenue grew 26%, yet the stock took a 10% hit last week.
- Microsoft: It posted positive free cash flow of $18.6 billion, with capex of $45.2 billion, below the $50 billion it projected.
- Debt: Microsoft, Alphabet, Amazon, Meta, and Oracle raised a combined $326 billion in debt in 2026, triple the amount raised last year, according to S&P Global Market Intelligence.
From reward to worry
Earlier in the AI boom, investors largely rewarded such big outlays, viewing them as a sign of confidence in the technology's growth potential. As we enter the fourth quarter, that enthusiasm seems to be giving way to concerns about negative free cash flow (spending more cash than a company brings in), mounting debt, and whether these investments will ever generate enough returns.
Part of the concern is that companies that used to have overflowing free cash flow from their core businesses are getting hit as AI threatens the economics of those businesses.
Company by company
Alphabet is the clearest example. The success of AI Mode, Google's AI-powered chatbot feature built directly into Search, is eating into the company's money-maker. Search advertising, roughly half of revenue, saw growth slow to 12%, its weakest pace in five quarters. Alphabet expects spending to keep rising in 2027. Google is spending billions on AI technology that could undermine the search business that pays it.
Amazon is in a similar boat, as the figures above show.
Meta noted that Muse, its new free personal AI agent, is a bit of a money pit. CEO Mark Zuckerberg has said it is “very compute-intensive to run.” Capex outpaced its operating cash.
Microsoft said its capex shortfall wasn't an intentional pullback from AI spending, blaming delays in capacity from third-party providers. As a result, shares of smaller companies that rent out AI computing power sank.
Where the money comes from
The cash isn't coming only from Big Tech profits. It is also showing up in stock and bond sales, hence the $326 billion in debt.
Demand for AI compute remains strong, and Google, Amazon, and Microsoft all saw gains in their cloud businesses. But investors are spooked by the costs of meeting that demand.
Anthropic's IPO in the mix
These muddied waters could complicate Anthropic's highly anticipated IPO. The company filed to go public earlier this week, and its future growth depends on securing enormous amounts of compute. The Financial Times reported Friday that Blackstone has warned investors Anthropic might not qualify for an investment-grade rating after its IPO. That could leave it more reliant on the hyperscalers and third parties to fund its infrastructure ambitions.
Verdict: Demand for AI compute is strong, but with free cash flow turning negative at Alphabet, Amazon, and Meta, and debt issuance tripling, investors are no longer rewarding the spending.
