During the Clinton administration, James Carville made the following quip:
“I used to think if there was reincarnation, I wanted to come back as the president or the pope or a .400 baseball hitter, but now I want to come back as the bond market. You can intimidate everybody.”
Thirty years later, the tech world is discovering that Carville was right.
Across enterprise tech, the dominant narrative has, of course, been the seemingly unstoppable scale of the AI build-out. Enterprises are spending because tangible productivity gains are showing up, despite early skepticism about ongoing ROI. There is no shortage of demand, but rather an ongoing concern about a shortage of supply.
However there’s a critical financial foundation underpinning that build-out, in that building these centers is highly capital-intensive and heavily financed by long-term debt. The cost of debt is now climbing quickly.
The yield curve is going to have a great deal to say about how - and where - the AI data center buildout happens.
The Capital Crunch Arrives
The rush to build data centers is already, of course, meeting considerable public resistance. Across the US, municipal resistance and regulatory delays are multiplying. Stories abound in the media of yet another governor, even some of those initially most enthusiastic, at least giving lip service to a data center ban in response to constituent concerns.
Yet the more consequential friction isn’t political—it’s the cost of capital. Former Fed chairman Jerome Powell generally steered a steady ship during his tenure, but is widely acknowledged to have waited too long to hike rates during the post-pandemic economic rebound, enabling an inflation surge. New chair Kevin Warsh has inherited another inflationary spiral, this one fueled by tariffs, trade wars and the Iran war, and so far at least seems clearly determined not to repeat Powell’s mistakes. Warsh, with a long history as an inflation hawk, correctly views higher rates as the bitter medicine the economy requires right now, leading to last week’s rate hike, and the likelihood of another before the end of the year.
The Fed plays a major role in setting rates of course, but operators also tend to overlook that it only controls the short end of the yield curve. The Fed sets overnight rates; but the bond market decides the rest. The multi-gigawatt campuses, fiber conduits, and physical infrastructure powering AI don’t get funded overnight. They rely almost exclusively on ten- to thirty-year debt—the same end of the curve set by global investors who are rapidly losing patience with fiscal irresponsibility in Washington, and are demanding higher rates as well.
Stein’s Law and the Erosion of Trust
Long-term yields and mortgage rates haven’t surged past 7% simply because of central bank policy. They’ve increased because global markets are pricing in a structural lack of discipline on the U.S. balance sheet.
Neither major U.S. political party these days demonstrates any real enthusiasm for fiscal restraint, except as rhetorical ammunition when sitting in the minority. At the same time, geopolitical friction and trade barriers have alienated foreign creditors, dampening their appetite for U.S. debt and even prompting several to repatriate their gold reserves. Where Washington refuses to discipline itself, the global bond vigilantes will step in to impose restraint, and that’s what appears to be happening.
Quoting economist Herbert Stein:
“If something cannot go on forever, it will stop.”
We are watching Stein’s Law collide directly with AI infrastructure. Spiking debt costs threaten to force capital rationing, wider credit spreads, and a structural slowdown in infrastructure build out.
The Opening Bell
I don’t expect higher rates to kill AI innovation—the utility and demand is too real—but they will aggressively reset the pace, the economics, and the geography of the physical rollout. As long as demand growth continues, the infrastructure to fulfill that demand will get built somewhere, but it becomes less likely to be built in the U.S.
The friction between Washington and the bond market is not new, but tension is building as both sovereign and corporate debt cross never-before seen thresholds. Some believe the U.S. is reaching a long-awaiting tipping point as debt recently crossed the $40 trillion mark, and higher rates on this massive volume of sovereign debt has the potential to crowd out investment financing the AI boom. As markets adjust, the ripple effects across tech, capital allocation, and the broader political landscape will be significant.
Buckle your seatbelts. And adjust your portfolios. The road ahead looks quite bumpy.