How Stablecoin Issuers Became Accidental Treasury Powerhouses—and Why That Matters for Rates and Crypto Stocks

Dollar-backed stablecoin issuers now hold more than $150 billion in short-term US Treasuries, rivaling sovereign nations and reshaping the market for safe assets—with direct consequences for interest rates, traditional banks, and the valuations of listed crypto platforms . ^[2]

In the second quarter of 2024, Tether became the third-largest purchaser of three-month US Treasury bills, trailing only the governments of the United Kingdom and the Cayman Islands . By October 2025, the stablecoin issuer's holdings had climbed to $135 billion, placing it seventeenth among all US Treasury holders globally and ahead of South Korea . As of December 2025, stablecoin issuers collectively held approximately $153 billion in Treasury bill positions, a figure that surpasses the holdings of many sovereign nations and rivals those of major institutional investors . ^[3] ^[4] ^[2]

This accumulation flows from the mechanical design of dollar stablecoins: every time a user mints a token pegged 1:1 to the US dollar, the issuer must park that dollar somewhere safe and liquid . The preferred destination has become short-dated Treasury bills . Research published by the Bank for International Settlements quantifies the effect: a $1 billion increase in stablecoin supply can push three-month Treasury yields down by roughly 0.71 basis points on impact, with the effect deepening to around 5 basis points over two weeks . That finding, drawn from daily data spanning January 2021 to March 2026, isolates stablecoin flows using an instrumental-variable approach designed to address reverse causality . ^[5] ^[1] ^[6] ^[7]

The implications extend beyond yield curves . Stablecoin demand for Treasuries has become a structural feature of the short-term funding market, one that interacts with Federal Reserve policy, competes with traditional bank deposits, and influences the stock prices of crypto platforms that distribute these tokens . ^[8] ^[9]

The Narrow-Bank Model That Built a Treasury Buyer

Stablecoins like Tether's USDT and Circle's USDC promise holders a 1:1 peg to the US dollar, redeemable on demand . Circle, the issuer of USDC, holds reserves in two pools—cash at regulated US banks and short-dated Treasury bills held in the Circle Reserve Fund, a SEC-registered government money market fund managed by BlackRock . The target mix is roughly 80 percent Treasuries and 20 percent cash, with reserves segregated from Circle's corporate assets and barred from being lent or rehypothecated . ^[5] ^[10] ^[11] ^[12]

Tether, with a market capitalization of $186 billion, holds approximately 63 percent of its reserves in Treasury bills . Circle, with $72 billion in market cap, allocates roughly 32 percent of reserves to T-bills . The issuance flow is operationally precise: a Circle Mint client wires USD to a Circle bank account, Circle credits the reserve, and an equivalent amount of USDC is minted to the client's onchain wallet . Redemption works in reverse, with same-day or next-day settlement for approved institutional clients . ^[13] ^[14] ^[15] ^[16]

Unlike algorithmic or crypto-collateralized stablecoins, every USDC in circulation corresponds to a dollar of cash or a Treasury bill maturing within roughly three months . Circle publishes the composition each month on its transparency page, including CUSIP-level holdings inside the Circle Reserve Fund . Issuer Circle publishes monthly Deloitte attestations, registers as a US money services business with FinCEN, and operates under the EU's Markets in Crypto-Assets (MiCA) framework via Circle France SAS . ^[17] ^[18] ^[19]

In 2025, stablecoin issuers purchased nearly $35 billion of US Treasury bills, a volume similar to the largest US government money market funds and larger than most foreign purchases . The outstanding stock of Treasury bills stood at roughly $6.78 trillion at mid-year, which puts Tether's holdings near 2 percent of the bill market . The market is dominated by stablecoins that are pegged to the US dollar, with backing assets composed mostly of dollar-denominated short-term instruments such as US Treasury securities . As of December 2025, their combined assets under management exceeded $270 billion, surpassing the short-term US securities holdings of major foreign investors . ^[20] ^[21] ^[1] ^[22]

As reported · As of 2026-08-25 · AI-generated supporting motif; facts and labels are sourced separately.

How Stablecoin Flows Push Down Short-Term Yields

The BIS research isolates the causal effect of stablecoin supply growth on three-month Treasury yields by constructing an instrument based on crypto-market sentiment shocks that are orthogonal to Treasury market conditions . A $1 billion increase in stablecoin supply lowers three-month yields by about 0.71 basis points on impact and roughly 4 basis points within ten days, with a trough of approximately 5 basis points reached at thirteen days . ^[7] ^[6]

The effect is state-dependent, increasing under Treasury market stress and with the scale of the stablecoin sector . The BIS paper highlights the growing interactions between stablecoins and traditional financial markets by analysing stablecoins' impact on short-term US Treasury yields . The concentration in the short end of the curve reflects issuer priorities: maintaining liquidity for redemptions while earning yield on reserves . ^[28] ^[9] ^[1]

The scale of the effect matters because stablecoin supply is procyclical with respect to crypto markets . When crypto prices rally, users mint tokens to move capital into digital assets, and issuers deploy the incoming dollars into Treasuries . When crypto prices fall, redemptions force issuers to sell Treasuries . The BIS study notes that the effect is asymmetric, with inflows exerting a larger impact than outflows . ^[5] ^[15] ^[16] ^[28]

The structural demand from stablecoin issuers has led some market participants to argue that stablecoins provide a stabilizing source of demand during periods of quantitative tightening . However, the scale of stablecoin reserves relative to the Treasury market limits the effect . At $153 billion, stablecoin holdings represent roughly 2 percent of the outstanding stock of Treasury bills . Their rapid growth in recent years raises questions about the impact on the markets they invest in, with potential broader implications for monetary policy and financial stability . ^[28] ^[21] ^[2] ^[8]

The Competitive Threat to Traditional Bank Deposits

The rise of stablecoin reserves has drawn sharp opposition from the banking industry, which views yield-bearing stablecoins as a direct competitor to deposit accounts . Banking industry trade groups have argued that such products could divert deposits, thereby undermining the lending capacity of the banking system . ^[29] ^[30]

This tension came to a head in early 2026 during congressional negotiations over stablecoin legislation . A draft provision obtained by the Blockchain Association would bar companies from paying interest "directly or indirectly" to users solely for holding stablecoins, while allowing reward mechanisms tied to genuine business activities, such as loyalty, promotional, or subscription-based incentives . ^[31] ^[32]

Coinbase and Circle share a long-term commercial distribution agreement around USDC, and both have leaned on interest payouts as a crucial growth driver . The new text, first reported by Punchbowl News, means that platforms like Coinbase would be barred from paying customers yield on their idle stablecoin balances . However, the language still permits the payment of rewards for stablecoins that are used in bona fide transactions, as well as for liquidity and market-making activities, and for posting collateral tied to a trade or loan . ^[33] ^[34] ^[35] ^[36]

The market widely fears that if such yields are banned, it could weaken users' incentive to hold stablecoins, thereby limiting the growth potential of products like USDC . Bank industry trade groups issued a statement calling for further changes to the rule, saying that the text "falls short" and leaves room for loopholes . The legislative debate over yield-sharing is, in part, a debate over the transmission channel for monetary policy . If stablecoins are allowed to pay interest, they become a closer substitute for bank deposits . If yield-sharing is restricted, stablecoins remain primarily a transactional tool . ^[37] ^[38] ^[32] ^[29]

How Legislative Uncertainty Moves Crypto Stock Prices

The legislative debate over stablecoin yields has had immediate and measurable effects on the valuations of listed crypto stocks . On May 4, 2026, shares of Circle Internet Group surged 20 percent and Coinbase Global climbed 5 percent after lawmakers unveiled revised stablecoin rule text . Investors are digesting long-awaited stablecoin yield text that's held up the crypto industry's key bill in Congress . ^[39] ^[40]

Ten days later, on May 14, 2026, Coinbase stock rose as much as 9 percent after the Senate Banking Committee pushed through the CLARITY Act with bipartisan support . Other financial platforms that offer crypto, including Gemini Space Station, Robinhood, and SoFi, climbed 6 percent, 5 percent, and 3 percent, respectively . The CLARITY Act, also known as the Digital Asset Market Clarity Act, sets basic legal standards for how regulators will divide oversight of digital assets . It dictates how financial institutions, including major banks, can conduct payment, lending, custody, and trading business . ^[41] ^[42] ^[43] ^[44]

Circle's business model depends on the growth of USDC supply . The revised language that allows rewards tied to transactions, liquidity provision, and collateral posting leaves room for product innovation . The regulatory outcome will determine the ceiling on stablecoin growth . As stablecoin supply grows, so does the structural bid for short-term Treasuries, which supports lower yields and reduces the government's borrowing costs . ^[45] ^[35] ^[36] ^[37] ^[6]

Percent · As of 2026-08-25 · AI-generated supporting motif; facts and labels are sourced separately.

The Sovereign Comparison and the Path Ahead

Tether's holdings now exceed those of Germany, the United Arab Emirates, and Australia . Tether ranks 17th among US Treasury holders with $135 billion, surpassing South Korea . A projection published by CryptoSlate in October 2025 assumes Tether continues adding to its book at a higher annual net pace each year, while the fifth-place line among foreign holders continues to shift . ^[47] ^[48] ^[49]

China holds roughly $1.15 trillion in US Treasuries, making it the largest foreign holder, while the fifth-ranked holder, Belgium, holds approximately $428 billion . The comparison to sovereign holders is instructive but imperfect . Sovereigns can reduce holdings for policy reasons; stablecoin issuers must liquidate Treasuries only when users redeem tokens . ^[25] ^[50] ^[16]

The stablecoin market crossed $322 billion in May 2026, surpassing the foreign exchange reserves of 95 nations including the United Kingdom and Canada . Most of that capital sits in one asset class: short-term US Treasury securities . Tether alone holds $141 billion in Treasury exposure, making it the 17th largest holder of US government debt globally, ahead of Germany and the UAE . Circle manages another $79 billion in USDC reserves that are roughly 84 percent linked to Treasuries through direct holdings and collateralized repurchase agreements . ^[51] ^[52] ^[53] ^[54]

Stablecoin issuers have become structural participants in the world's most important debt market . Two landmark papers from the IMF and the Bank for International Settlements now quantify what fixed-income traders have suspected: stablecoin reserve demand is measurably compressing short-term Treasury yields . ^[55] ^[56]

The Regulatory Perimeter and Dollar Dominance

The debate over stablecoin regulation in Washington has been framed, from the first hearing to the most recent markup, as a question of consumer protection . The Treasury published proposed rules on August 17 defining when payment stablecoins are issued, offered, or sold in the United States, with enforcement beginning January 2027, creating a compliance perimeter that favors dollar issuers with American banking relationships .

The dollar's share of global central bank reserves has declined from 72 percent in 2000 to roughly 57 percent in 2025, and stablecoins now circulate in countries where physical dollars and correspondent banking relationships have historically been difficult to maintain . Treasury bills, insured bank deposits, or Treasury repurchase agreements, turning every compliant stablecoin into a vehicle for dollar denominated sovereign debt distribution .

Tether holds Treasury bills as of its latest attestation, a position larger than the sovereign Treasury holdings of all but 18 countries, making a single stablecoin issuer one of the largest buyers of American government debt . FASB proposed three tests for stablecoins to qualify as cash equivalents on corporate balance sheets: redemption at par within one business day, reserves in low risk liquid assets, and independent attestation, codifying dollar stablecoins into the accounting system that underpins corporate finance .

What the Evidence Shows About Rates, Banks, and Crypto Stocks

The central question—how stablecoin issuers became major buyers of short-term Treasuries, and what that means for rates, banks, and listed crypto stocks—has a clear answer . Stablecoins are now a structural feature of the Treasury market, large enough to move yields at the margin and to compete with banks for deposits . ^[1] ^[9] ^[30]

The BIS research suggests that the effect is already measurable and will grow as the stablecoin sector scales . The legislative debate over yield-sharing will determine whether that competition intensifies or moderates, and the outcome will directly affect the valuations of Circle, Coinbase, and other platforms that distribute stablecoins . The mechanical link between token supply and Treasury demand is here to stay . ^[9] ^[39] ^[41] ^[5]

The interaction between stablecoin demand and Federal Reserve policy raises a subtler question about monetary transmission . The BIS research notes that the yield effect of stablecoin inflows is larger when Treasury market stress is elevated . The path forward for stablecoin issuers depends on the resolution of two intertwined questions: whether they will be allowed to share yield with users, and whether they will be subject to bank-like regulation . The revised stablecoin bill text that emerged in May 2026 represents a compromise, restricting direct interest payments while permitting rewards tied to specific activities . Banking industry groups continue to push for tighter restrictions . ^[9] ^[28] ^[32] ^[38]

The tension that opened this account—a private issuer of digital tokens now holds more US government debt than most sovereign nations—reflects a deeper shift in how dollars circulate globally . The regulatory debate will determine whether stablecoins remain a transactional tool or evolve into a yield-bearing alternative to bank deposits . Either way, the structural bid for short-term Treasuries is already reshaping the market for the world's safest asset . ^[4] ^[50] ^[37] ^[6]