By 1948, the war was over—but Europe was still in ruins.
Factories had been destroyed. Railways, ports and cities needed rebuilding. Governments were deeply indebted, local currencies were fragile, and the continent urgently needed capital.
The United States responded with the European Recovery Program, better known as the Marshall Plan. From 1948 through 1952 the program delivered approximately $13.3 billion in assistance to Western Europe — well over $150 billion in today’s dollars, depending on the inflation measure used.
The recovery was remarkable. Industrial production revived, trade expanded, and Western Europe entered two decades of unusually strong growth. President Harry Truman later called the Marshall Plan “one of America’s greatest contributions to the peace of the world.”
But here is the part few people know.
The dollars sent to rebuild Europe did not simply return home when reconstruction ended. Many stayed inside European banks.
Those offshore dollars helped create one of the largest, most important and least visible financial systems in the world: the eurodollar market.
Seven decades later, another global dollar network is expanding outside the traditional banking system. This time the dollars move on public blockchains.
And unlike the eurodollar market, the United States is building a regulatory framework around this one before it reaches trillions of dollars.
The hidden history of the eurodollar
Despite the name, a eurodollar is not the euro currency, and it does not have to sit in Europe. It is a U.S.-dollar deposit or liability booked outside the United States.
London became one of the market’s earliest centers. In 1955, Midland Bank found that it could attract dollar deposits, use currency swaps, and place those funds where interest-rate differences produced a profit.
The strategy worked with unusual speed. Midland’s dollar deposits grew from almost nothing in May 1955 to roughly $80 million within three months, according to economic historian Catherine Schenk’s archival research into the origins of the London eurodollar market.
Other institutions noticed quickly. By that summer, European banks were moving short-term dollar assets from New York to London to capture more attractive offshore rates.
This was more than an arbitrage trade. It was the beginning of a parallel dollar system.
The market gave international banks access to dollar funding without routing every transaction through the U.S. domestic banking framework. It financed trade, cross-border lending and global investment. By the 1960s, tens of billions of dollars were held offshore. By the 1970s, the market had reached hundreds of billions. It eventually became one of the foundations of global wholesale finance.
Its precise size remains difficult to calculate. Modern estimates of the broader offshore dollar system run into the many trillions, but no consolidated ledger captures every dollar liability, maturity mismatch and collateral chain. The Bank for International Settlements and other researchers have to reconstruct the system from cross-border banking statistics.
That measurement gap is the eurodollar market’s defining weakness.
The United States supplies the currency. It does not directly supervise the entire offshore network that creates, lends and borrows it.
When an offshore market still needs the Federal Reserve
The eurodollar market extended the dollar’s reach. It also created a recurring policy problem.
A dollar liability booked in London, Singapore or the Cayman Islands remains economically connected to the U.S. dollar system. When global institutions urgently need dollars, the stress does not stop at America’s regulatory border.
March 2020 made this visible.
As the COVID-19 shock spread, institutions worldwide rushed to obtain dollars. Funding markets tightened, liquidity deteriorated, and the Federal Reserve expanded swap lines with foreign central banks. It also created the Foreign and International Monetary Authorities Repo Facility, allowing approved official institutions to exchange U.S. Treasury securities temporarily for dollars rather than sell those securities into a stressed market.
At the peak, Federal Reserve dollar swap lines reached roughly $450 billion outstanding.
The intervention worked. It also exposed the underlying arrangement: the United States may not supervise the entire offshore dollar market, but the Federal Reserve remains its ultimate liquidity backstop.
Note what the Fed was working with. It could not directly observe the offshore exposure, so it responded broadly and generously. That is the practical cost of a market nobody can measure in real time.
Stablecoins introduce a different architecture.
They are global like eurodollars, but their liabilities are visible on-chain. They circulate outside the United States, but regulated issuers must hold reserves designed to support redemption. And under the GENIUS Act, Washington can influence which issuers and tokens are permitted to reach U.S. users.
Stablecoins as the next global dollar network
Stablecoins are blockchain-based tokens designed to hold a stable value, most commonly one U.S. dollar per token. Their role is not primarily speculative. They function as digital cash for trading, payments, remittances, collateral and settlement.
Dollar-backed stablecoins generally hold reserves in cash, short-term U.S. Treasury securities, government money-market funds and overnight repurchase agreements. Those assets are meant to stay liquid enough to meet redemptions at par.
Circulating supply has grown past $300 billion, reaching a scale comparable to the early eurodollar market far faster than the offshore banking system did. As of August 2026, industry trackers put the total near $308 billion, up roughly 14% year over year but several percentage points below the May 2026 peak.
Two issuers dominate:
- Tether’s USDT: approximately $183–185 billion in circulation
- Circle’s USDC: approximately $72–73 billion in circulation
- Combined share: roughly 82% of global stablecoin supply
That concentration matters. So does the speed at which a new form of dollar liquidity reached global scale.
Stablecoins are already used across centralized exchanges, decentralized finance, cross-border transfers and emerging payment systems. They settle continuously, move outside banking hours, and can be integrated directly into software.
The eurodollar globalized the dollar through offshore banks. Stablecoins are globalizing it through public ledgers.
A new class of buyer for U.S. debt
The most important structural difference between stablecoins and traditional eurodollars is the reserve model.
A eurodollar deposit is generally a liability of an offshore bank, supported by that bank’s broader balance sheet, including loans and other credit assets. A regulated payment stablecoin is expected to be backed by a separate pool of highly liquid assets.
That structure turns stablecoin issuers into large buyers of short-term U.S. government debt.
Circle holds most USDC reserves in cash and in the Circle Reserve Fund, a government money-market fund managed by BlackRock. Circle publishes reserve holdings weekly and obtains monthly third-party assurance that reserve value equals or exceeds USDC in circulation. Because the fund carries its own reporting obligations, portfolio composition is observable without asking Circle directly.
Tether’s second-quarter 2026 disclosure, prepared by BDO, reported approximately $187.75 billion in assets against $183.64 billion in liabilities as of June 30, leaving roughly $4.11 billion in excess reserves. Earlier in 2026 the company reported about $141 billion in direct and indirect exposure to U.S. Treasury bills.
One figure in that report deserves attention. The $4.11 billion buffer was $8.23 billion three months earlier. As a share of reported token liabilities, the cushion contracted materially during a quarter marked by substantial volatility in gold and bitcoin. In a stress scenario, that buffer is what absorbs valuation shocks before the peg itself is tested.
Tether also reached a genuine verification milestone on August 13, 2026. Tether announced that KPMG U.S. had issued an unqualified opinion on Tether International’s financial statements for the year ended December 31, 2025—the company’s first full financial-statement audit. According to the company, the audited accounts showed reserves exceeding liabilities by $6.814 billion at year-end.
That is a meaningful step beyond quarterly attestations, and it should be reported as one. An audit tests transactions, systems, counterparties and supporting evidence across a reporting period; an attestation confirms specified figures at a specified date.
Two qualifications keep the development in proportion. The opinion covers the year ended December 31, 2025, so Tether’s 2026 quarterly figures fall outside that reporting period. More importantly, an annual audit is a retrospective examination—not continuous verification of the reserves supporting tokens in circulation today.
At roughly $141 billion, Tether’s reported Treasury exposure is comparable in scale to the holdings of major sovereign investors. The comparison is illustrative rather than exact: Treasury’s official country rankings measure holdings by custodial jurisdiction, not by beneficial owner, so an issuer and a country are not directly commensurable. The scale point survives the caveat. One private stablecoin group has become a significant participant in the market for U.S. government debt.
If stablecoin circulation keeps growing under rules that require high-quality liquid reserves, issuers will need to acquire more Treasury bills, repo exposure and government money-market assets.
Stablecoins could therefore become a durable, global source of demand for American debt. That is not only a crypto story. It is a development in U.S. funding strategy.
Here comes GENIUS
The GENIUS Act establishes the first comprehensive federal framework for U.S. payment stablecoins. Its expected effective date is January 18, 2027, eighteen months after enactment.
The law sets standards for permitted issuers, reserve assets, redemption, disclosure, risk management and supervision. It also addresses foreign-issued stablecoins offered or made available in the United States.
The framework tightens on July 18, 2028. From that date, digital-asset service providers generally may not offer or sell a payment stablecoin to a person in the United States unless the token comes from a permitted issuer, subject to specified exemptions and safe harbors.
Treasury’s proposed implementation of Section 3, published August 18, 2026, adds a requirement that deserves more attention than it has received. For certain foreign-issued stablecoins, a U.S. digital-asset service provider may need a reasonable basis to conclude that the issuer has the technological capability to comply with lawful orders, and will comply with them.
A corporate promise alone may not be enough. Treasury’s proposal contemplates reasonable due diligence and asks whether technical review, including examination of smart contracts, should form part of that process.
This is where the strategic logic of GENIUS becomes clear.
The United States does not need to operate every blockchain or hold every reserve account. It can define the conditions under which a dollar-denominated token may enter the regulated U.S. market.
Those conditions can include verified issuer identity and licensing; eligible, liquid reserve assets; reliable redemption rights; regular disclosure and independent assurance; anti-money-laundering controls; and technical capacity to respond to lawful orders.
The eurodollar market expanded first and forced regulators to react later. The stablecoin market is developing while its regulatory architecture is still being written.
What the United States gains
The benefit is not simply control. It is influence over the design of the next dollar network.
Reserve requirements can create recurring demand for U.S. Treasury securities.
Licensing and distribution rules can bring issuers and service providers inside a defined supervisory perimeter.
Technical requirements can make important compliance properties verifiable at the contract or protocol level rather than asserted in a document.
And public blockchains provide a degree of liability-side visibility that the eurodollar market never offered. Anyone can monitor stablecoin supply, mints, burns, holder concentration and transfers in near real time, without permission and without trusting the issuer.
That combination — global distribution, Treasury-backed reserves, public rails and U.S.-defined market-access standards — is genuinely new.
But the system is not fully transparent yet.
The missing half of the ledger
Stablecoin liabilities are visible on-chain. Most reserve assets are not.
Anyone can independently verify how many USDT or USDC tokens exist across supported networks, block by block. Treasury bills, repo positions, bank deposits and money-market-fund shares still depend on custodians, corporate records, assurance reports and audited financial statements.
Circle offers comparatively frequent visibility through weekly reserve disclosures, monthly third-party assurance and the independent reporting framework of the Circle Reserve Fund. Tether now combines quarterly BDO attestations with the KPMG annual audit.
Both are real advances. Neither provides a continuously updated cryptographic link between the tokens outstanding and the assets held.
The distinction matters in a specific way. A financial-statement audit examines whether statements are fairly presented for a reporting period. A reserve attestation evaluates defined assertions under specified criteria, usually as of a particular date. Both strengthen trust. Neither continuously proves that every asset remains present, unencumbered and available for redemption at the moment a token holder checks the chain.
This asymmetry runs in an awkward direction. Redemption pressure is observable in seconds; reserve adequacy is observable monthly or quarterly. During a stress event, the market can watch net burns, exchange inflows and peg deviation in real time while the only available evidence about the assets is a snapshot from weeks earlier. The issuer’s fastest possible response is a document about the past.
That gap is the next major infrastructure opportunity in this market.
What it will take to close it:
- standardized, machine-readable reserve disclosures rather than PDFs;
- data signed directly by banks and custodians, so the trust anchor moves off the issuer;
- verifiable links among issuers, legal entities, domains and wallet addresses, so that “who is this issuer” is a checkable fact rather than a claim;
- transparent contract-control and administrative-key disclosure, including who can freeze, mint or upgrade;
- automated alerts when reserve composition or governance conditions change; and
- over time, more reserve assets represented on-ledger, where the asset side becomes as observable as the liability side.
The last point may offer the strongest technical path toward closing the visibility gap. Tokenized reserve assets could make balances and movements more observable, reducing dependence on periodic disclosures. But tokenization alone would not prove beneficial ownership, freedom from encumbrance, custody integrity or enforceable redemption rights; those elements would still require independent legal and financial verification.
There is also a practical consequence of Treasury’s due-diligence language that the market has not priced. If exchanges and payment processors must form and document a defensible view of each foreign issuer’s identity, licensing status and technical capability — continuously, across hundreds of issuers — that is a verification workload created by statute, with a fixed date attached.
Compliance properties are cheapest to verify when they live at the protocol layer and most expensive to verify when they live in a corporate representation. Ledgers with native issuance controls, enumerable holder relationships, protocol-level freeze and clawback, and on-ledger credential or identity primitives can turn several of these requirements from promises into observable facts. XRP Ledger and RLUSD are one live test of whether that posture converts into a compliance advantage under GENIUS; the general principle applies regardless of which chain gets there first.
The strongest stablecoin system will not ask the market to trust faster. It will let the market verify more.
Not a complete replacement for eurodollars
Stablecoins could become a new global dollar settlement layer. They will not replace the entire eurodollar system in the near future.
Eurodollars support wholesale lending, trade finance, derivatives, bank funding and maturity transformation. A eurodollar deposit is credit money: elastic, created through lending. A fully reserved payment stablecoin is not. It is narrower by design.
To reproduce the eurodollar’s credit function, additional lending, leverage and risk-taking layers would have to develop around stablecoins. Some already exist through decentralized lending markets and tokenized financial products. Those layers reintroduce exactly the risks a fully reserved token is meant to avoid.
The more defensible conclusion is also the more useful one.
Stablecoins do not need to replace offshore banking to transform global dollar settlement. If businesses, institutions and individuals increasingly use stablecoins to move and settle dollar value, the payment layer can migrate on-chain while traditional banks continue to provide credit.
The risks behind the opportunity
Issuer concentration. Two issuers account for roughly 82% of supply. Stablecoins circulate across many blockchains, but chain diversification is not issuer diversification.
Redemption reflexivity. Large redemption waves could require issuers to mobilize cash, unwind repo positions or sell short-term assets. Stablecoins create demand for Treasury bills during expansion and can reverse that flow during contraction, transmitting crypto-market stress into the front end of the curve.
Reserve composition risk. Non-cash-equivalent holdings such as gold and bitcoin generate returns but introduce mark-to-market volatility into the buffer that supports the peg, as Tether’s second quarter illustrated.
Regulatory migration. Activity may move toward jurisdictions with weaker standards while remaining economically connected to U.S. markets. That is the eurodollar problem, rebuilt digitally.
Bank disintermediation. Money moved from bank deposits into fully reserved stablecoins also moves out of the credit-creation system and into government securities. At scale, that is monetarily contractionary.
The yield prohibition. GENIUS bars issuers from paying yield to holders. The eurodollar market grew partly because offshore banks paid depositors more. Stablecoin growth will have to come from payment utility instead, and yield-seeking capital will look for wrapped or structured products that sit outside the payment-stablecoin definition — and outside its verification requirements.
Verification lag. Token supply moves in real time; reserve assurance remains periodic. In a crisis, the market may observe redemptions and peg pressure faster than it can independently confirm the issuer’s current asset position.
These risks do not invalidate the thesis. They explain why the quality of regulation, disclosure and verification will determine whether this market can scale safely.
What to watch
The Section 3 comment period. Watch the official Federal Register deadline for comments on Treasury’s proposal. The eventual definition of “reasonable due diligence” for foreign-issuer representations will determine how much verification work the private sector inherits.
Between now and implementation. Watch proposed and final rules from Treasury, the OCC, Federal Reserve, FDIC and NCUA. The reserve-reporting format matters most. Whether regulators require instrument-, custodian- and maturity-level detail will determine whether the asset side becomes analyzable or remains a headline number.
January 18, 2027. The GENIUS Act’s core issuer restrictions are expected to become effective, subject to applicable transition provisions, waivers and final implementing rules.
Each quarter. Issuer buffer-to-supply ratios, and whether the 2026 attestations are eventually brought under audit alongside the 2025 statements.
July 18, 2028. The distribution prohibition takes effect, and issuer due diligence stops being optional for every U.S. exchange and payment processor.
The next dollar era
The Marshall Plan helped rebuild Europe and placed American dollars deep inside the international financial system.
Banks then transformed those dollars into the eurodollar market, a network that extended the dollar’s influence worldwide while growing beyond complete U.S. visibility.
Stablecoins are the next stage of that evolution. Global like eurodollars, but digitally native. Circulating offshore, but with supply visible on public ledgers. Backed by reserves that create demand for U.S. government debt, under a framework that gives Washington influence over which issuers and tokens can serve American users.
They will not replace the offshore dollar market overnight. They can become the global dollar’s settlement layer: faster, programmable, Treasury-backed and more observable than the system that came before it.
Whether that observability extends to the reserve side is the question that will decide how safely this market scales.
The eurodollar moved the dollar offshore. Stablecoins are moving the dollar on-chain.