Stablecoins Are Quietly One of America's Biggest Treasury Buyers

By Kendal, Goldzweig. Proof, not promises.

Key facts

• A stablecoin issuer holds reserves to back its tokens one-for-one, and since 2025 those reserves are mostly US Treasuries. That makes the issuers, in effect, large buyers of US government debt.
• The scale is now sovereign. Tether's Q1 2026 reserves of about 191.8 billion dollars include roughly 141 billion in US Treasury exposure, ranking it around 17th among all global holders of US government debt, ahead of South Korea and the UAE (source: Yahoo Finance, Tether attestation, 2026).
• Circle, behind USDC, holds most of its roughly 75 billion in reserves in Treasuries and Treasury-backed repo. Together the two largest issuers hold over 160 billion dollars in US Treasuries.
• It is now law. The GENIUS Act of July 2025 requires stablecoin reserves to sit in low-risk assets like Treasuries, so every dollar of stablecoin growth is close to automatic demand for US government debt.
• This arrives as foreign buyers retreat. China's US Treasury holdings fell from over 1 trillion dollars to around 756 billion, and stablecoins are quietly filling part of the gap.

A crypto company sits between South Korea and the UAE

Look down the list of the largest holders of United States government debt. Japan near the top. China, shrinking. Then the usual roll of central banks and sovereign wealth funds. And somewhere around seventeenth, wedged between South Korea and the United Arab Emirates, sits not a country at all but a crypto company.

That is Tether, the issuer of the largest stablecoin, and its presence on that list is one of the most important and least discussed developments in all of finance. The dollar token that crypto traders use to move in and out of positions has become, almost as a side effect, a major creditor of the United States government. How that happened, and what it means for both crypto and the bond market, is the subject. So let us trace the money.

What a stablecoin reserve actually is

Start with the simple machine. A stablecoin like USDT or USDC promises that one token is always worth one dollar. To keep that promise it holds reserves, real assets worth at least as much as all the tokens in circulation.

The mechanism, precisely: when you buy a stablecoin, the issuer takes your dollar and buys an asset with it. For years that might have been commercial paper, bank deposits, or murkier holdings. Since 2025 it is overwhelmingly short-term US Treasury bills and Treasury-backed repo, because the GENIUS Act now requires stablecoin reserves to be held in exactly those low-risk instruments. So the flow is direct: money comes into the stablecoin, the issuer buys T-bills with it. Every net new dollar of stablecoin demand becomes a near-automatic, price-insensitive bid for US government debt. The token is a dollar to its user. Underneath, it is a Treasury bill.

Shadow money with a sovereign footprint

This is where Perry Mehrling's framework in The New Lombard Street makes the picture click. Mehrling describes money as a hierarchy, with cash and central-bank reserves at the base and a sprawl of private "shadow money" above, instruments that promise to trade at par, one-for-one with dollars, as long as confidence and collateral hold. A stablecoin is exactly that: privately issued shadow money, promising par convertibility, backed by the safest collateral in the system. What is new is the footprint. This particular layer of shadow money has grown large enough that its collateral buying now moves the base of the pyramid it sits on. The private dollar substitute has become a structural buyer of the public debt that anchors the whole hierarchy.

And the timing is what makes it matter. Edward Chancellor's central theme in The Price of Time is that the question of who finances government debt is never neutral, it shapes interest rates, deficits, and the room a state has to maneuver. For a decade the answer included large foreign creditors. Now China's holdings have fallen from over a trillion dollars toward 756 billion, and a chunk of that retreating foreign demand is being replaced by a new, captive, domestic-ish buyer that did not exist a few years ago: the stablecoin float. A buyer that purchases bills not because it judges them cheap, but because the law and its own business model require it. That is a meaningful new source of demand for short-term US debt, and meaningful demand tends to nudge short-term yields lower than they would otherwise sit.

Why this is really a story about crypto's place in the world

Keep the protagonist straight. This is not a story about Treasuries that happens to mention crypto. It is a story about what crypto's dollar rail became, and what that does to crypto's relationship with the most powerful institution on earth.

Read the GENIUS Act through this lens and it stops looking like a leash and starts looking like a recruitment. By forcing stablecoins onto Treasury collateral, the US did two things at once. It exported dollar dominance, planting hundreds of billions of programmable dollars across the globe at the exact moment rivals talk of de-dollarization. And it manufactured a new buyer for its own debt as old buyers step back. Crypto's most-used instrument has been quietly drafted into the service of US monetary statecraft. That is a powerful form of protection. An industry that helps finance the government and project the dollar is an industry the government has reason to keep alive.

But protection and subordination are the same coin. The price of becoming useful to the state is becoming entangled with it, and that entanglement runs in both directions, which is where the risk lives.

What breaks

The danger is a transmission line that now runs straight from crypto confidence into the US bond market. Picture a loss of faith in a major stablecoin, the kind of run that has hit pegged dollars before. To honour redemptions, the issuer must sell its reserves, and its reserves are Treasuries. A large, fast, forced sale of Treasuries during a panic is exactly the kind of event that can disturb the market for the world's supposed risk-free asset. The Bank for International Settlements has already published work on stablecoins and safe-asset prices for precisely this reason. A crypto-native bank run is no longer contained to crypto. It now has a wire into the plumbing of the Treasury market.

Then keep it honest in the other direction, because the story is easy to overinflate. Over 160 billion dollars is large, but it is still small against a US Treasury market measured in the tens of trillions, and stablecoin holdings cluster in short bills rather than across the whole curve, so the influence is real but bounded. The concentration is its own concern: a single issuer, Tether, accounts for the bulk of it, and its history of opacity means the world is trusting attestations more than it might like. And the entire structure rests on the regulatory settlement holding. The law that made stablecoins Treasury buyers could be rewritten, and the demand it created could thin as fast as it appeared.

Bottom line

Stablecoins stopped being a crypto curiosity and became plumbing in the machine that finances the United States. That is the quiet headline of 2026: the dollar was not disrupted by crypto, it recruited crypto, and crypto's dollar rail now sits among America's larger creditors. For the industry it is a shield, an entanglement with the state that makes it harder to kill. For the bond market it is a new and largely untested channel of contagion, a wire running from the confidence of crypto traders into the price of the world's safe asset. Watch the reserves, not just the price. The most important thing happening to stablecoins is no longer on the blockchain. It is on the Treasury's balance sheet.

FAQ

Do stablecoins buy US Treasuries? Yes, in large volume. Stablecoin issuers back their tokens with reserves, and since the 2025 GENIUS Act those reserves are mostly short-term US Treasuries and Treasury-backed repo. Every new dollar of stablecoin demand becomes near-automatic demand for US government debt.

How much in Treasuries do stablecoins hold? The two largest issuers, Tether and Circle, together hold over 160 billion dollars in US Treasuries as of early 2026. Tether alone has around 141 billion in Treasury exposure, ranking it roughly 17th among all global holders of US government debt.

Why do stablecoin issuers hold Treasuries? To keep their one-dollar peg safe and liquid, and because the GENIUS Act now legally requires reserves to be held in low-risk assets like Treasuries. They also earn the Treasury yield on those reserves, which is how issuers make most of their money.

Are stablecoins important to the US government? Increasingly, yes. They create new demand for US debt as foreign buyers like China retreat, and they spread dollar usage globally. This gives the US a strategic reason to support a regulated stablecoin industry.

What is the risk of stablecoins holding so many Treasuries? A loss of confidence could force an issuer to sell Treasuries quickly to fund redemptions, which could disturb the market for the world's risk-free asset. It creates a new channel of contagion from a crypto bank run into the US bond market.

Could stablecoins really affect Treasury yields? At the margin, yes. They are a large and growing source of price-insensitive demand for short-term bills, which can nudge short yields lower. But their holdings are still small against the multi-trillion-dollar Treasury market, so the effect is real but bounded.

Sources

• Yahoo Finance, Tether holds more US Treasuries than South Korea and UAE: https://finance.yahoo.com/news/stablecoin-giant-tether-now-holds-115119171.html
• Spark, how stablecoins move Treasury markets, the demand shock: https://www.spark.money/research/stablecoin-treasury-yield-impact
• BIS Working Paper No 1270, stablecoins and safe asset prices: https://www.bis.org/publ/work1270.pdf
• ECB, stablecoins on the rise and spillover risks: https://www.ecb.europa.eu/press/financial-stability-publications/fsr/focus/2025/html/ecb.fsrbox202511_05~63636227b4.en.html
• AlphaPoint, stablecoin treasury management guide 2026: https://alphapoint.com/blog/stablecoin-treasury-management-for-institutions-the-definitive-2026-guide