- Wall Street is getting jumpy about Big Tech’s AI data center spending spree
- Capex is climbing, debt demand is cooling and investors want proof the payoff is coming
- A wave of data center legislation could add another headache for hyperscalers
Wall Street is starting to wonder whether Big Tech’s AI infrastructure boom is a gold rush — or a very expensive leap of faith.
Despite another blockbuster round of profit reports, analysts on hyperscalers’ Q2 2026 earnigns calls asked pointed questions about capital expenditures, margins, revenue and demand. There seem to be growing doubts about whether the billions being invested in data centers will pay off as handsomely as expected.
Bernstein’s Mark Moerdler summed it up quite succinctly during Microsoft’s Q&A: “Azure is growing fast. AI is growing even faster within your overall business, but there’s a bit of a disconnect that makes investors a bit nervous between how fast they’re seeing capex growing and how fast they’re seeing revenue growing.”
Indeed, capex has continued to climb as the cloud titans battle rising component costs in their race to build out new facilities as quickly as they can. Though these builds are backed by order backlogs that have climbed into the hundreds of billions of dollars, the costs have hit free cash flow hard, sending even Alphabet into negative territory.
Investors' waning enthusiasm for GenAI infra
Investors’ waning enthusiasm is beginning to flow through into the capital markets.
Private funding for generative AI infrastructure fell off in Q2, with the $70 billion total coming in at around half of what was raised in Q1 (though both were still all-time records), recent data from S&P Global showed. This was primarily attributed to larger companies moving toward public fundraising. But even the public markets seem to have less of an appetite these days.
Bloomberg recently noted that demand for AI-related debt and equity deals has slumped. Alphabet’s public fundraiser in February was 4.7 times oversubscribed. But demand for Amazon’s just a few months later in July came in only 1.6 times what was on offer.
So, what’s going on?
There are likely several factors, not the least of which is that investors hate uncertainty. All the talk about the AI bubble has generated uncertainty around long-term demand. Rising capex has sparked questions about whether the revenue generated from multi-billion dollar facilities will be sufficient to justify the expense. And there’s no escaping the fact that public outcry against data centers is starting to prompt local, state and federal officials into action.
Flurry of legislation for data centers
In July, Congress notably ramped efforts to rein in data centers on the federal level. Though just a trickle of data center bills were introduced earlier in the year, July saw a flurry of legislation proposed to study and regulate AI infrastructure.
Virginia Senator Mark Warner last month introduced the “Data Center Tax Accountability and Disclosure Act” which would require data center operators to disclose metrics around electricity and water usage, among other things. Michigan Congresswoman Hillary Scholten introduced similar bills in the House of Representatives, as did Illinois Congresswoman Lauren Underwood.
Meanwhile, Florida Congressman Byron Donalds floated legislation that would require new and existing data centers to use off-grid power and water. A bill from Ohio Congressman Greg Landsman would commission a study from the National Academies assessing noise and air pollution, water consumption, carbon emissions and waste from data centers and the impacts on public health. Congresswoman Rashida Tlaib put forth a bill that would outright prohibit AI data centers on federal land (which seems like it would put the kibosh on the Department of Energy's efforts to transform some of its land holdings into new data center campuses).
All of these bills were introduced in July. The followed on a proposal for a moratorium on data center construction that was floated in June, as well as a handful of other proposals aimed at studying or regulating data centers.
It’s not clear that any of these bills will become law, as they would need to be approved by both chambers of Congress and signed by the President. But the sentiment is clearly there.
Perhaps the biggest indicator of which direction the winds are currently blowing is this: Loudoun County, Virginia, part of Data Center Alley and home to the most data centers in the world, is reportedly considering a temporary moratorium on data center development.
No wonder investors are a bit spooked.
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