The world’s most important bond market is losing some of its most reliable customers. Long-term institutional investors, foreign central banks, and sovereign wealth funds are collectively pulling back from US Treasuries at a moment when the government needs their money more than ever.
With total US federal debt now exceeding $40 trillion and publicly held debt sitting around $32.3 trillion (north of 100% of GDP), the buyers who historically absorbed that supply without flinching are demanding a lot more compensation for showing up.
The numbers tell a stark story
The 10-year Treasury yield climbed to roughly 4.80% in early September 2026, its highest level since early 2025. The 30-year yield is even more eye-catching, hitting between 5.27% and 5.32%, territory the market hasn’t visited since 2007.
Those aren’t just abstract basis points. They translate directly into what the government pays to borrow. Net federal interest expense is projected to exceed $1 trillion for fiscal 2026. To put that in perspective, the US is now spending more on debt service than it does on defense.
Foreign private investor net purchases of Treasuries dropped more than 40% year-over-year, totaling $329 billion through June 2026. Total foreign holdings slipped to $9.299 trillion.
Perhaps the most symbolic signal came from Norway’s sovereign wealth fund, the largest of its kind on the planet. It proposed cutting government bonds in its benchmark allocation from 70% to 50%. Applied proportionally, that shift could translate to a roughly $75 billion reduction in US Treasury holdings alone.
Who used to buy, and why they’ve stopped
For decades, the Treasury market benefited from a class of buyers that economists call “price-insensitive.” Foreign central banks recycling trade surpluses, the Federal Reserve conducting quantitative easing, and sovereign wealth funds parking reserves in safe assets. Once representing nearly half of the market, official sector holders such as foreign central banks and the Federal Reserve have seen their share decline to around 27% as private investors absorbed the majority of the surge in outstanding debt from approximately $4 trillion in 2006 to nearly $29 trillion.
What’s replacing them is a buyer base that is very much price-sensitive. Hedge funds, asset managers, and retail investors all demand higher yields to compensate for duration risk and the growing fiscal uncertainty surrounding US debt.
Adding to the competitive pressure, corporate bond issuance has surged as companies, particularly in sectors like AI infrastructure, tap capital markets aggressively. Those bonds are fishing from the same pool of investor dollars, forcing Treasuries to offer more attractive yields to compete with corporate credit.
The Treasury’s response
Treasury Secretary Scott Bessent has not been passive. In response to the softening demand, the department announced an expansion in long-term bond buybacks, raising operations to at least $4 billion per transaction effective September 2026. The buyback program is designed to smooth market functioning and absorb older, less liquid bonds.
The Treasury buys back off-the-run bonds (older issues that trade less frequently) and replaces them with fresh, on-the-run securities that are easier for dealers to trade. It doesn’t reduce the total debt, but it can help stabilize pricing and reduce liquidity premiums.
What this means for borrowing costs everywhere
Treasuries serve as the benchmark for virtually every other interest rate in the US economy. When the 10-year yield rises, mortgage rates follow. Corporate borrowing costs increase. Municipal bond yields adjust upward.
For the government itself, rising yields create a feedback loop that fiscal analysts find particularly unnerving. Higher rates mean higher interest costs, which mean larger deficits, which mean more borrowing, which puts more upward pressure on rates. The Congressional Budget Office has been warning about this dynamic for years, and the math is starting to get real.
Refinancing risk is the immediate concern. A significant portion of the outstanding debt was issued when rates were much lower. As those securities mature and need to be rolled over at current yields, the interest bill climbs even if the government doesn’t borrow a single additional dollar.