For years, US technology giants had a tacit agreement with investors: The companies could spend lavishly on artificial intelligence, and the stock market would reward them long as their revenues were rising. That deal is suddenly breaking down.

Alphabet Inc. shares plunged more than 7% on Thursday, their worst day in over a year after the company raised its capital expenditures in 2026 to as much as $205 billion and reported that free cash flow turned negative in the second quarter for the first time since its 2004 initial public offering.

Nevermind that Google’s parent also delivered a whopping 82% increase in cloud-computing revenue, far surpassing Wall Street estimates. Investors were worried about all the spending.

“People are really focused on capex, obsessed with it. It used to be the more the better, but now it is the less the better,” said Jason Lemire, chief investment officer at Bold Wealth Partners. “We’re seeing capital raises, negative cash flows, rising debt. All that adds risk to the picture.”

The selloff shows how much the narrative around AI and the Magnificent Seven tech behemoths has shifted. Suddenly it’s become difficult to please investors as capex rises. That Alphabet got hit is particularly notable because it’s seen as the biggest AI winner among the group because of the popularity of its Gemini AI services, homegrown data center chips and booming cloud-computing business.