Economists have a new name for a shift showing up in how capital is moving through US markets, and it is the opposite of the pattern they usually worry about. Instead of government borrowing crowding out private investment, the huge volume of debt AI companies are issuing to fund data centers and infrastructure is starting to crowd out demand for Treasury bonds, some analysts argue, forcing the government to offer higher yields just to attract enough buyers.
The scale of corporate borrowing behind that shift is large. Companies issued about 1.7 trillion dollars in bonds through July this year, running roughly 27 percent ahead of last year's pace and on track to top 2 trillion dollars annually. Wall Street veteran Ed Yardeni has laid out the mechanism plainly: when AI hyperscalers and other large corporations are competing for the same pool of global capital as the US Treasury, and are willing to pay up for it, that pool gets stretched thinner for government debt.
Treasury Secretary Scott Bessent has acknowledged the dynamic directly, describing the companies driving this borrowing as almost yield agnostic, meaning they are willing to pay elevated interest rates without much hesitation because the returns they expect from AI infrastructure investment outweigh the cost of the debt. Fidelity's Jurrien Timmer has said Bessent is well aware of how this is playing out, and Federal Reserve Chairman Kevin Warsh has pointed to what he called ever expanding pools of capital flowing specifically into AI infrastructure as evidence of the same trend.
The numbers underlying the concern are sizable on both sides. US national debt stands near 40 trillion dollars, with the federal deficit projected at about 2 trillion dollars this fiscal year and annual debt servicing costs already running around 1 trillion dollars. At the same time, foreign private sector buyers have purchased more US corporate bonds than Treasury debt over the past year, a reversal that adds weight to the crowding out argument. S&P Global has also flagged early signs of fatigue in the market, noting that hyperscalers have recently had to accept higher borrowing premiums, a sign that even AI focused debt may not be immune to the pressure building underneath it.