The U.S. national debt has climbed to roughly $39 trillion, and a familiar source of demand — foreign governments — is pulling back. Into that gap has stepped an unlikely player: Tether, the company behind the world’s largest stablecoin.
The Shift in Treasury Holders
For decades, central banks and sovereign wealth funds in countries like China, Japan, and Saudi Arabia were among the biggest holders of U.S. government debt. But that pattern is changing. Official data show foreign governments have been reducing their Treasury holdings in recent years, selling off billions of dollars worth of bonds. The reasons vary: some nations need dollars to defend their own currencies, others are diversifying reserves into gold or other assets.
As those sellers exit, someone has to buy the debt. The U.S. Treasury relies on steady demand to finance government spending. If traditional buyers step back, yields would have to rise to attract new ones — and that raises the cost of borrowing for the federal government.
Tether's Growing Role
Enter Tether. The company, best known for issuing the USDT stablecoin, has quietly become one of the largest net buyers of U.S. Treasuries. Tether’s reserves, which back its stablecoin, are heavily invested in short-term Treasury bills. The company now holds tens of billions of dollars in U.S. government debt, making it a significant player in the Treasury market.
Analysts following the trend describe Tether as an “unlikely new backstop” for U.S. debt. The phrase captures the oddity: a private crypto firm, often scrutinized by regulators, is now propping up demand for the world’s safest asset. Tether’s purchases help absorb supply that foreign central banks are no longer buying.
The shift matters beyond crypto circles. If Tether or other stablecoin issuers ever faced a run or regulatory crackdown, their Treasury holdings could be sold quickly, potentially rattling a market that underpins global finance. For now, though, Tether’s buying provides a buffer. The company says its reserves are managed conservatively, with a focus on liquidity.
But the bigger question is whether this reliance on a crypto firm is sustainable. Foreign governments still hold trillions in Treasuries, but their share is shrinking. The U.S. continues to run large deficits, and the $39 trillion debt figure keeps growing. Who will buy the next round of bonds?
Tether’s role is a sign of how the debt market is evolving — and how the line between traditional finance and crypto is blurring. The next Treasury auction will offer a fresh test of demand.
