AI infrastructure spending spooks investors as Big Tech debt mounts
Investor anxiety is spreading over Big Tech's massive AI infrastructure spending, as free cash flow turns negative and debt levels triple. Alphabet, Amazon and Meta all saw stock declines despite strong cloud growth.
Wall Street's enthusiasm for the massive artificial intelligence spending spree is cooling, as investors grow uneasy about the mounting costs and debt that major technology companies are taking on to build out AI infrastructure. Over the past two weeks, the four largest US tech firms outlined combined capital expenditure plans exceeding $740 billion for the year, a figure Wall Street increasingly views with skepticism rather than optimism.
Market jitters spread across tech stocks
The mood shift was visible on Friday when the Nasdaq composite fell 2.9%. Chipmakers took the brunt: Nvidia shed 4%, Broadcom lost more than 5%, and Qualcomm plunged 11%. Alphabet, which suffered its worst trading day on record Thursday with a 12% drop that erased about $500 billion in market value, continued to slide. The selloff reflects a broader worry that companies which once generated abundant free cash flow are now seeing those reserves shrink as AI investments strain their finances.
Google's search business feels the AI squeeze
Alphabet offers the clearest illustration of the tension. The company posted negative free cash flow of $9.1 billion in the third quarter — its second consecutive quarter in the red — even as quarterly capital spending climbed to $51.4 billion. Alphabet expects to spend as much as $205 billion this year and anticipates further increases in 2027. The problem is compounded by the success of AI Mode, Google's AI-powered chatbot integrated into Search. That feature is cutting into the company's core revenue engine: Search advertising, which accounts for roughly half of Alphabet's revenue, saw growth slow to 12%, its weakest pace in five quarters. The company is effectively funding the technology that could undermine its primary moneymaker.
Amazon and Meta burning through cash
Amazon finds itself in a similar position. The e-commerce and cloud giant reported negative free cash flow of $42.4 billion over the trailing twelve months, a sharp reversal from the $14.8 billion positive figure a year earlier. With capex guidance of $220 billion for the year, Amazon's stock fell 7% after its earnings release, even though its cloud unit AWS posted 39% revenue growth.
Meta is also spending heavily. The company recorded negative free cash flow of $2.1 billion in the third quarter as capital expenditures outpaced operating cash flow. It's guiding to as much as $145 billion in capital spending this year. CEO Mark Zuckerberg has acknowledged that Muse, the company's free personal AI agent, is expensive to operate, describing it as "very compute-intensive to run." Despite advertising revenue growing 26%, Meta's shares dropped 10% last week.
Microsoft bucks the trend, debt financing rises
Microsoft was the outlier among the big four, posting $18.6 billion in positive free cash flow in its latest quarter. Its capex came in at $45.2 billion, below the $50 billion the company had projected. Microsoft attributed the shortfall to delays from third-party capacity providers rather than any deliberate slowdown in AI investment. The news nonetheless dragged down shares of smaller companies that rent out AI computing power.
The funding for this infrastructure buildout isn't coming solely from operating profits. According to S&P Global Market Intelligence, Microsoft, Alphabet, Amazon, Meta, and Oracle together raised $326 billion in debt in 2026 — triple the amount they raised the previous year.
Anthropic IPO faces uncertain backdrop
The shifting sentiment could complicate Anthropic's highly anticipated initial public offering. The AI company filed to go public this week, and its growth plans hinge on securing vast amounts of computing capacity. The Financial Times reported that Blackstone has warned investors Anthropic may not qualify for an investment-grade credit rating after its IPO, which could leave it more dependent on hyperscalers and third parties to finance its infrastructure ambitions.
Despite the anxiety, demand for AI computing remains strong — Google, Amazon, and Microsoft all reported growth in their cloud businesses. The question hanging over the market is whether the enormous costs of meeting that demand will ever translate into returns that justify the spending.
