This week, the U.S. Treasury doubled the size of its long-term bond buybacks to calm a market that had just watched 30-year yields hit their highest level since 2007. Taken alone, that looks like a plumbing fix. Taken together with five things this blog has already covered, it’s the latest scene in a much bigger story: the AI debt bubble — a chain of borrowing that starts with AI infrastructure and ends up leaning on the U.S. government’s own borrowing costs.
Here’s how the five pieces connect, in order.
It starts with the bill. Building AI infrastructure — data centers, chips, power — costs an enormous amount of money, and that bill doesn’t disappear just because a project changes hands or a company reprices its plans. Someone ends up paying for capacity that was built on optimistic assumptions.
Next comes how that bill gets paid. Increasingly, it’s not with cash on hand — it’s with borrowed money, and AI-linked corporate debt has been competing directly with U.S. Treasuries for the same pool of lender cash, pushing up what everyone, government included, has to pay to borrow.
Then comes a newer twist: companies that don’t want to sell their most valuable asset — an equity stake — are borrowing against it instead, leveraging up without giving up ownership. It’s a way to keep funding AI bets without diluting anyone, but it’s still debt sitting on someone’s balance sheet.
All that borrowing needs a buyer on the other side, and the traditional buyers of U.S. government debt haven’t been enough to absorb it. Instead, a new class of buyer — stablecoin issuers among them — has quietly become one of the largest holders of U.S. debt, stepping in where old demand fell short.
And all of that pressure eventually shows up in the price of money itself. When yields on long bonds climb, the discount rate used to value every future dollar of profit rises with them — and richly priced tech stocks get hit hardest, because more of their value sits far in the future.
Put the five pieces in a row and this week’s buyback stops looking like an isolated policy tweak. It’s the Treasury trying to manage a symptom of a debt chain that starts with AI spending. Doubling the buyback can calm a jumpy bond market for a few months. It doesn’t touch the underlying fact: a huge slice of the AI boom is being funded by debt, and debt eventually has to be serviced by someone, at whatever rate the market demands.
Not advice. Just how I see it.