Tether Holds $141 Billion in Treasuries as US Debt Hits $30.2 Trillion

The numbers are staggering. Total marketable US Treasury debt blew past $30.2 trillion by the end of fiscal year 2025, and the country ran a $1.8 trillion deficit on top of that. Interest payments alone topped $1 trillion — more than the Pentagon’s budget, more than Medicare. And the buyers who used to absorb all that debt? They’re pulling back.

That’s the crux of the problem. Foreign central banks have been trimming their Treasury holdings for years, and the Federal Reserve has been doing the same after its post-pandemic buying spree. So who’s stepping in? Hedge funds, asset managers, retail investors — and, increasingly, Tether. The stablecoin issuer had $141 billion in Treasury exposure by 2025, making it one of the largest non-sovereign holders of US government debt on the planet. Crypto-native capital is now propping up part of America’s borrowing infrastructure. That’s not a metaphor. That’s the actual market structure right now.

Hedge Funds Running at 18-to-1 Leverage

The hedge fund angle is probably the scariest part of this. Funds have been piling into the cash-futures basis trade — essentially leveraged arbitrage that exploits tiny price gaps between Treasury securities and futures contracts. By March 2025, their notional short Treasury futures positions had crossed $1 trillion. Some funds were running leverage ratios above 18:1. That’s a lot of rope to hang yourself with if something goes wrong.

Fed Governor Lisa Cook flagged the systemic risk of these leveraged positions in November 2025. She’s not wrong to worry. The repo market froze in September 2019 — that was the first real sign the plumbing was fragile. Then March 2020 hit, institutional investors rushed for the exits, liquidity evaporated, and the Fed had to step in with emergency purchases on a scale nobody had seen before. What was supposed to be a one-time fix became a habit. The Fed’s interventions, originally pitched as temporary, are now basically a permanent feature of how this market functions. That’s a structural problem, not a seasonal one.

Nearly $3 trillion of debt matured in 2025 alone, all of it needing to be refinanced with new buyers at current yields. And those yields aren’t coming down. The 10-year Treasury yield has refused to drop below 4.3%, even after the Fed cut its benchmark rate three separate times. Mortgage rates have stayed above 6% as a direct result — a real, tangible hit to American households trying to buy homes.

Bitcoin Below $80,000, Tether in the Middle of It All

Bitcoin felt it too. As Treasury yields climbed in 2026, Bitcoin fell below $80,000. That kind of sensitivity to macro conditions wasn’t always obvious in crypto markets, but it’s pretty much undeniable now. Bitcoin trades like a risk asset, and when the cost of money rises and liquidity tightens, risk assets suffer. Simple as that.

More context: DraftKings Bets on Federal Rules as Polymarket Insider Case Hits $1.2M

But here’s the twist. While Bitcoin was getting hit by Treasury dynamics, Tether was actually becoming a pillar of the Treasury market itself. That’s a strange loop — crypto capital absorbing the debt that traditional buyers won’t touch, while crypto prices fall because of the stress that debt is creating. The interdependency runs deep, and it’s not clear anyone fully mapped it out before it happened.

The Congressional Budget Office has warned that interest payments could reach $2.2 trillion by 2036 if yields stay elevated. That’s not a distant hypothetical. At current trajectory, it’s a reasonable base case.

So what holds this together? Right now, it’s a fragile mix: central bank backstops that were never meant to be permanent, hedge funds leveraged to the hilt, and stablecoin issuers absorbing sovereign debt at scale. Any instability in the stablecoin market — a regulatory shock, a bank run on Tether, a liquidity crunch — could ripple directly into Treasury securities. The lines between traditional finance and crypto aren’t blurring anymore. They’ve already crossed.

More context: Bond Markets Defy the Fed as 30-Year Treasury Yield Nears 5.1% and Barclays Pushes Rate Cut to 2027

Weekly market calendars are now dominated by Treasury auction results and refinancing schedules. That’s the reality traders are living in. And with leverage ratios above 18:1 sitting in the system, one bad auction could matter a lot more than people expect.