Stablecoin

A stablecoin is a digital token designed to maintain a relatively stable value. The most common approach is to peg its price to a fiat currency, with the vast majority pegged to the US dollar. Stablecoins differ from highly volatile cryptoassets such as bitcoin and ether, as well as from the Central Bank Digital Currency issued by a country's central bank. The central challenge for stablecoins is how to keep a token's market price aligned with its reference asset over the long term when the issuer's promise alone cannot guarantee this. Various designs have emerged to address this challenge, including fiat-backed, overcollateralized cryptoasset-backed, commodity-backed, and algorithmic stablecoins. Their risks and records of failure vary considerably.

Stablecoins matter, first, because they have become the primary means of settlement and unit of account in crypto markets, while also serving practical functions in cross-border payments, fund transfers, and decentralized finance. Second, major issuers hold substantial reserves in assets such as short-term government debt. As stablecoins grow in scale, they increasingly raise macroeconomic issues involving monetary policy transmission, the composition of bank deposits, and financial stability. Regulators around the world are therefore accelerating efforts to establish appropriate legal frameworks. This article covers, in order, the definition of stablecoins and the challenge of maintaining a peg; their early history; the various designs and their reserve management; mechanisms for maintaining price stability; notable collapses; market size and structure; major uses; sources of risk; regulation in the United States, the European Union, and elsewhere; and debates over their macroeconomic impact.

Definition and the core peg problem

A stablecoin is a crypto-asset designed to keep its market value close to an external reference, most often one U.S. dollar. Bitcoin and ether, by contrast, float freely against currencies and have no fixed anchor. A central bank digital currency is a direct liability of a central-bank and usually carries legal-tender status. A stablecoin is normally a privately issued claim on an issuer and its reserve assets, recorded on a blockchain. Some stablecoins reference the euro, gold or a basket of assets, so the dollar is the dominant but not the only anchor.

The peg is a promise, not a natural property of the token. A stablecoin usually has no cash flow and no intrinsic use value, so its price of about one dollar rests on the expectation that a holder can exchange it for a dollar through the issuer, or sell it to someone who will. Arbitrageurs enforce this expectation. If the market price falls below the reference, they buy cheap tokens and redeem them at par. If it rises above, they create new tokens and sell them. This loop works only when redemption is credible, reserves are real and reachable, and the market is liquid enough for trades to clear. Where any of these conditions fails, the price is governed by sentiment and can drift away from the reference value.

Classification by collateral

Pegs are commonly grouped by what stands behind them. In fiat-collateralized designs, the issuer holds reserves in cash, bank deposits or short-term government securities, and each token is a claim on those reserves. In crypto-collateralized designs, users lock up more value in crypto assets than the tokens they mint, so that a fall in collateral prices is absorbed by the surplus. When the buffer runs low, the position is liquidated. Commodity-backed tokens are linked to gold or other commodities, with the underlying usually held in custody. Non-collateralized or algorithmic designs have no full asset backing. They attempt to hold the peg by expanding or contracting supply according to an algorithm, often with the help of a companion token, and they are the most fragile category. These types are analytical ideals, and many real products combine elements of several.

Terminology across legal frameworks

Legal definitions do not match the economic taxonomy. In the United States, the GENIUS Act, signed in July 2025, uses the term "payment stablecoin" for a digital asset intended for payment or settlement that maintains a stable value against a fixed monetary amount. The label determines which licensing, reserve and redemption rules apply. In the European Union, the Markets in Crypto-Assets Regulation (EU MiCA) does not use "stablecoin" as a single legal category. It separates e-money tokens, which reference a single official currency and must be issued by an authorized entity, from asset-referenced tokens, which reference several currencies, commodities or other assets and face stricter governance requirements. Because the same token can fall into different regimes depending on its reference asset and issuer, classification shapes both who may issue and what reserves they must hold.

Taken together, these distinctions frame the rest of the entry. A stablecoin is best understood as a money-like instrument whose stability depends on the credibility of its redemption promise, the quality of its collateral, and the market infrastructure that connects the token to its reference value.

Origins and early experiments

The first on-chain attempts at a dollar-pegged token appeared in 2014. BitUSD went live on the BitShables platform on July 21, 2014. It was over-collateralised: each unit was meant to be backed by about two dollars of BTS, which was locked in a smart contract. The design had no external price feed tracking the real dollar. Its peg depended entirely on the collateral's own market price, because the system never measured the value of a real dollar. The volatility of its backing asset eventually pulled the token off the dollar in 2018. Adoption stayed marginal, which commentators attribute to liquidity problems and the complexity of the design.

Tether followed a simpler path. It began as Realcoin, and it was built on Bitcoin's Omni Layer protocol, with the first tokens issued on October 6, 2014. The name was changed to Tether in November 2014. Its model was straightforward: each USDT was said to be backed by one dollar held in the company's bank accounts. In its early years it served mainly as a bridge for traders, moving value between exchanges that struggled to hold actual bank dollars. In 2015 control passed to the operators of the Bitfinex exchange, which listed USDT and sped up its adoption. Reserve disclosure became an early point of contention: its reserves were described as backed by quarterly attestations rather than a full audit.

MakerDAO's Dai marked a different approach, with collateral held on a public ledger rather than in bank accounts. Dai launched on the main Ethereum network on December 18, 2017. The first version, known as Single-Collateral Dai (SAI), relied on collateralized debt positions in which users locked ETH to mint the token, and ETH was the only accepted asset. The design was tested early: the token stayed close to one dollar during its first year, even though ETH fell by more than 80%. Multi-collateral support arrived in late 2019. It opened the system to wrapped bitcoin and other Ethereum-based tokens alongside ETH. Because the vaults were public, anyone could inspect the collateral, and that transparency attracted developers building lending protocols and decentralized exchanges.

Growth came slowly at first and then accelerated with exchange trading and DeFi demand. Aggregate supply was roughly 27 billion dollars at the end of 2020. Estimates varied widely across providers, however. One 2020 overview put the combined market at only about 5 billion dollars. By September 2025, USDT's circulating supply alone exceeded 170 billion dollars, roughly two-thirds of all stablecoin value in circulation.

These early designs set the terms of later debates on trust, transparency and decentralization. Supporters of on-chain collateral argued that ledger-visible backing offered more peace of mind than off-chain reserves held by issuers like Tether. BitUSD showed the limits of that argument, since a stablecoin's stability can be no stronger than the collateral behind it. The contrast between transparent, crypto-backed designs and opaque, custodial reserves became a central axis of the debate that followed.

Fiat-collateralized issuance and reserve management

Fiat-collateralized stablecoins are the dominant design in practice. An issuer takes in dollars from customers, holds an equivalent value in reserve assets, and redeems tokens at par. Whether the peg holds under stress depends on what those reserves are, how they are verified, where they are kept, and how the issuer earns its income.

Reserve composition is the first question. Tether's quarterly report for June 30, 2026 shows total assets of about $187.75 billion against about $183.64 billion in liabilities, with roughly $115 billion in U.S. Treasury bills and about $13.5 billion in secured loans. Tether also reports gold and bitcoin holdings, which sit at the riskier end of the reserve spectrum. Figures for the same issuer vary across commentaries because they count direct bill holdings, repo agreements and money-market fund exposure differently. A Q1 2026 figure of about $141 billion in Treasury exposure, for example, includes indirect holdings. Circle, by contrast, holds USDC reserves as cash at banks and in a money-market fund that invests in short-term Treasuries. The underlying trade-off is between liquidity and yield. Cash and overnight instruments can be converted quickly but pay little, while longer-dated or less liquid assets pay more and carry credit risk or the risk of a discounted sale in a hurry.

Verification is the second question, and it is where much of the public dispute lies. An attestation is a point-in-time assurance report in which an accountant tests a management claim, typically that reserves at least equal tokens in circulation on a given date. It does not examine internal controls or solvency across a period. A full financial audit covers the issuer's statements over a fiscal year and tests its processes. Because monthly audits are impractical, most issuers rely on attestations. Tether publishes quarterly attestations prepared by BDO Italia under an international assurance standard, and industry analysts have noted that it has not published a full audit of all reserves by a Big Four firm. Circle publishes monthly attestations and also includes USDC in its annual financial statement audit. Critics argue that snapshot reports cannot show how reserves behave between dates, and that publication lags of several weeks leave gaps. Some issuers, such as Tether, disclose a specific excess-reserve buffer ($8.23 billion in Q1 2026), while others confirm that reserves exceed supply without quantifying the surplus. The result is a spectrum of disclosure rather than a binary between "backed" and "unbacked."

Custody determines what holders can claim if an issuer or its banking partner fails. Reserves may sit in bank deposits, trust accounts, broker-dealer accounts or, for some designs, on-chain collateral, and custody arrangements differ widely. Protective measures include keeping reserves segregated from the issuer's own balance sheet and structuring the holding so that reserve assets are not exposed to the issuer's general creditors, a property often described as bankruptcy-remoteness. These protections are only as strong as their legal basis, which is why regulators in several jurisdictions have made segregation and custody rules explicit.

Interest income is the central economic fact of the fiat-backed model. Holders of most fiat-backed tokens typically receive no yield from the issuer, so the issuer keeps the return on reserves. Circle's reserve income was about $2.64 billion in fiscal 2025, roughly 96 percent of its total revenue, and in the second quarter of 2026 it accounted for about 95 percent of revenue, with the average reserve return rate falling to 3.5 percent. Growth in circulation offset the lower yield. The model is therefore sensitive to interest rates and to the size of the float. One industry estimate suggested that a 100-basis-point cut would reduce Circle's annual revenue by roughly a quarter to a third. Distribution costs also matter: Coinbase reportedly received about 56 percent of USDC reserve revenue in 2024. For issuers, a large float of low-cost, short-dated government debt is both the source of profit and the main channel through which monetary policy shapes the stablecoin business, while the same reserves must remain readily convertible if holders redeem in a run.

Crypto-collateralized and commodity-backed designs

Crypto-collateralized stablecoins try to hold a dollar reference without relying on a company's bank deposits or Treasury portfolio. Users lock a volatile digital asset in a smart contract and mint tokens against it. The main buffer is overcollateralization. Protocols require more collateral value than the tokens they issue, which lets the system absorb price declines in the collateral while still backing holders. In practice, Ethereum users have typically posted between 130% and 175% of a stablecoin's value in crypto collateral. The cost is efficiency: users tie up more value than they are able to borrow, and that idle collateral cannot be deployed elsewhere.

The contract cannot observe market prices by itself, so it depends on a price oracle. A manipulated or delayed oracle can trigger incorrect liquidations or allow undercollateralized positions to persist. When a position breaches its threshold, the system must recover value. In many lending protocols, a liquidator repays part of the debt and receives the collateral at a discount. Alternatively, the collateral is liquidated through an auction. MakerDAO's vaults follow the auction route: a vault whose collateral falls below its threshold is wound down, and the proceeds retire the debt.

DAI's collateral has changed considerably since launch. Pure crypto collateral was the 2017 model. Through 2020 to 2022, a large share of backing sat as USDC in the Peg Stability Module, which critics saw as a centralization risk. That concentration was flagged repeatedly. After the Silicon Valley Bank failure unsettled USDC, the protocol launched an emergency proposal to reduce how much DAI could be minted against centralized stablecoins. The protocol then diversified toward real-world assets. By early 2024, these assets had become the backbone of DAI's collateral. Over the same stretch, USDC's share of collateral fell from 51% at the start of one year to 9.4%.

The later mix is contested in its details. One 2026 table puts stablecoin-based PSM holdings near half of backing and real-world assets at roughly one-sixth, while another 2026 statistics page gives RWA exposure at 23.5% of collateral and PSM-related assets at 32.9%. Figures vary by dashboard and date. The design debate follows from this. Treasury-backed vaults generate protocol revenue, but they introduce regulatory counterparty risk that crypto-native collateral explicitly avoided. Analysts also note that over-collateralized liquidation shifts risk from a systemic "equity risk" borne by all token holders to an "agent risk" borne by individual vault owners.

Commodity-backed tokens form a separate family. They derive value from physical assets stored off-chain and track commodity spot prices rather than a fixed dollar peg. Gold tokens illustrate the structure. PAXG's bullion is held in Brink's vaults in London. New tokens appear only as metal enters custody, and they are destroyed when metal leaves: tokens are minted when gold is added and burned when gold is redeemed. The issuer states that an independent third-party accounting firm conducts audits monthly.

Physical redemption is restricted. Redeeming a full LBMA bar directly from Paxos requires 430 PAXG, and smaller amounts are available only through partner retailers. XAUT is stricter: holders need a minimum of 430 XAUT to request physical delivery, which must be arranged for a designated location in Switzerland. Consequently, for most retail investors XAUT primarily functions as a price-tracking and trading instrument. The two tokens also differ in issuer: PAXG is an OCC-supervised national trust, while XAUT is issued by an entity in El Salvador. Together they held approximately 96.7% of the tokenized gold market as of February 2026.

Across these designs, the basic trade-off is among capital efficiency, decentralization and stability under stress. Heavy overcollateralization and on-chain liquidation reduce dependence on any single issuer but lock up capital. Real-world-asset and gold tokens use capital more efficiently and are easier to verify, but they reintroduce custody and issuer risk. In extreme markets, liquidity in collateral markets can deteriorate during stress, so forced selling can push prices further.

Algorithmic and seigniorage designs and their failures

Algorithmic stablecoins try to hold a peg without holding reserves large enough to redeem every token at par. The best-known variant is the seigniorage model, which pairs the stablecoin with a second, volatile token whose supply the protocol adjusts. The protocol expands or contracts the stablecoin supply, and the companion token absorbs the difference. In the design used by TerraUSD (UST), a holder could burn one UST to mint $1 worth of the companion token, LUNA, and could burn LUNA to mint UST. If UST traded below $1, arbitrageurs bought it cheaply, burned it for newly minted LUNA, and so reduced UST supply. The mechanism therefore worked only as long as the companion token had enough market value to absorb the redemptions.

TerraUSD grew largely because of Anchor Protocol, which paid depositors yields of roughly 20 percent in May 2022, about the same as the yields offered in the fall of 2021. The yield attracted about $14 billion in deposits. Its sustainability depended on borrowing demand and on the continued value of LUNA, and Anchor cut its rate in early May, which prompted withdrawals. On May 7, 2022, large sales of UST in decentralized exchange pools pushed the token below $1. Depositors pulled billions of UST from Anchor within days, and the redemption mechanism then became a race. Holders who redeemed UST for LUNA increased the supply of LUNA, which pushed its price down, which reduced the value each unit of LUNA could absorb, which made redemptions more attractive. The Luna Foundation Guard, an entity connected to the project, held a reserve of bitcoin and other assets intended to defend the peg, but it was small relative to UST outstanding. Within about a week, LUNA fell from roughly $80 to a fraction of a cent, and UST traded far below its reference value. Estimates of total value destroyed vary by data provider, but they commonly exceed $40 billion. The founder of Terraform Labs, Do Kwon, later pleaded guilty to fraud charges in a U.S. federal court.

The episode illustrated several lessons. First, a peg that depends on demand for a companion token is reflexive: the same loss of confidence that triggers redemptions also reduces the resources available to defend the peg. Second, high yields can conceal dependence on new inflows, so the stablecoin's demand may be partly a function of returns that cannot persist. Third, a protocol cannot easily defend a peg against a large, coordinated exit with a reserve that is much smaller than the liability. Finally, opacity about reserves, the sustainability of yields and the relationship between the two tokens made it hard for holders to judge their risk before the collapse. These lessons fed directly into the debate about runs on stablecoins, discussed elsewhere in this entry.

Algorithmic ideas did not disappear after 2022. Frax Finance launched in December 2020 as a fractional-algorithmic stablecoin, partly backed by USDC and partly stabilized through its governance token FXS, with the collateral ratio adjusting to market demand. After the Terra collapse, the community moved the design toward full collateralization, and later versions aim for near-complete backing by external assets, including real-world assets held through partners. Other projects continue to experiment with hybrid models that combine overcollateralization, liquidity management and market-neutral strategies, while some proposals favor backing algorithmic tokens with other crypto assets. Such experiments remain contested.

Regulators have responded by drawing a firm boundary around these designs. The U.S. GENIUS Act of 2025 limits the term "payment stablecoin" to tokens that are redeemable at par and fully backed by eligible reserves, and it does not extend the framework to algorithmic designs, even though it does not expressly ban them. The International Monetary Fund has noted that most regulators do not allow algorithmic stablecoins to qualify as regulated stablecoins. Frameworks in other jurisdictions, including the EU's MiCA, impose reserve, redemption and governance requirements that purely algorithmic models struggle to satisfy. The practical effect is that algorithmic and hybrid designs face the strictest treatment, and their use is increasingly confined to decentralized finance and jurisdictions with lighter rules. The debate over whether such designs can be made safe continues within the crypto industry, but the regulatory consensus has moved sharply toward reserve-backed tokens.

Peg maintenance: redemption, arbitrage and depegging

How the peg is held in place

A stablecoin keeps its market price near its reference value mainly through trading, not through any rule built into the token. If the token trades below par, a trader can buy it cheaply and redeem it with the issuer at full value. The redeemed tokens are destroyed, which shrinks supply, and the buying itself lifts the market price. If the token trades above par, the trader can deposit dollars, receive newly minted tokens at par, and sell them into the premium, which adds supply and pushes the price down.

The people who can carry out these trades directly form a narrow group. Direct redemption with issuers like Circle or Tether is restricted to institutional participants who pass KYC/AML verification. These firms, often specialized trading desks with banking relationships, do the arbitrage, while ordinary holders simply trade at the market price and benefit from the gap being closed. Redemption also depends on banking plumbing. For USDC, redeeming through the issuer's platform requires a U.S. bank account able to receive ACH or wire transfers.

Decentralized designs follow the same logic with smart contracts instead of a corporate redemption desk. The Liquity V1 system, for example, lets LUSD holders exchange their tokens for the ether collateral at face value, which sets a floor under the price, and such redemptions carry a fee with a minimum of 0.5%.

When arbitrage fails

The mechanism works only if arbitrageurs trust that they can turn tokens into dollars quickly and at par. The arbitrage mechanism breaks down when arbitrageurs themselves are uncertain about redemption, because no one will buy a discounted token they cannot confidently redeem. Several conditions can cause this breakdown:

• Halted or delayed redemption. A pause in primary redemption removes the bridge between the market price and the reference value, and a discount can then persist for as long as the pause lasts.
• Frozen banking access. Because reserves and redemption payouts run through bank accounts, a failure or freeze at a banking partner can delay the cash leg even when the reserves are nominally sound.
• Thin market liquidity. The process depends heavily on liquidity and the speed at which traders can execute cross-market operations. Deep liquidity ensures that large trades can occur without drastically altering the price. In shallow markets, a large sale can push the price down far enough that arbitrage no longer pays.
• Doubts about reserve value. If holders suspect the reserves are worth less than the token's face value, buying at a discount and redeeming at par is a bet on the reserves, not a riskless trade.
• Costs and time. If redemption takes days or involves fees, the spread must be wide enough to cover the cost and the risk of waiting, so small discounts can persist.

USDC in March 2023

The USDC episode of March 2023 shows these conditions at work. Silicon Valley Bank was shut down on Friday morning by California regulators. The same day, Circle said it had $3.3 billion of its $40 billion of USDC reserves at collapsed lender Silicon Valley Bank. The token then broke its 1:1 dollar peg and fell as low as $0.88 early Saturday, according to market tracker CoinGecko.

The problem was not a shortage of arbitrage incentives. The discount was large, but closing it required redeeming USDC for cash, and part of that cash was held at a bank that was failing. Buying the discount therefore meant accepting the risk that the SVB deposits would not be paid out in time. The FDIC said that insured depositors would have full access to their insured deposits at SVB no later than Monday morning, March 13, 2023. After the government moved to protect depositors and confidence returned, USDC returned to its original value of $1 after about three days of depegging. Sources differ on how much of the market's recovery came from arbitrage alone and how much came from the announced guarantee; the latter appears to have removed the doubt that had blocked the trade.

Transmission of stress

Depegs rarely stay confined to one token. During the SVB episode, the event resulted in the depegging of USDC, DAI, and FRAX, and on-chain research found that the event generated synchronized activity across stablecoin-related assets, with users moving from USDC into other stablecoins such as USDT and into major cryptoassets such as BTC and ETH.

Stress also passes through decentralized markets. In DeFi, arbitrage is often executed through liquidity pools on decentralized exchanges, so an imbalance in a pool can block the trade that would restore the peg. For crypto-collateralized designs, a fall in the price of the collateral lowers the collateral ratio and places the peg under mechanical pressure, which links stablecoin prices to the broader crypto market. Broad sell-offs can therefore weaken the peg through three channels at once: collateral values, pool liquidity and the willingness of traders to hold tokens they might not be able to redeem quickly.

Market structure, scale and blockchain distribution

Total size and how it is measured

Estimates of the stablecoin market in 2026 cluster around 300 billion dollars, but the exact figure depends on the tracker and its method. DefiLlama put the total at about 308 billion dollars in mid-August, roughly 4.5 percent below a peak of 322.4 billion dollars reached on 17 May 2026. Other providers reported different levels for similar dates. One put the market at 321.21 billion dollars on May 24, while a Q3 report based on Token Terminal data put it at 300.9 billion dollars on October 1, covering 195 assets, 152 issuers and 47 blockchain networks. Part of the gap is definitional. One chain-level total sums native circulating supply on each chain, whereas an all-issuers total sums each issuer's circulating supply, including bridged versions. Growth has also been uneven: supply is still up 14.3% over twelve months but fell 4.28% over 90 days to mid-August.

Issuer concentration and currency mix

The market is dominated by two issuers. In DefiLlama's August data, Tether's USDT led at about 59% of supply and USD Coin was second at roughly 23%, together about 82% of the market. Token Terminal's October figures place the combined share of Tether and Circle at 85.9% of total stablecoin supply. The currency mix is even more concentrated: about 99.5% of supply is denominated in US dollars. Behind the leaders, the remaining share is split among smaller tokens. Sky's USDS and Dai each hold only a few percent, for example, with USDS at a market cap of about 9.83 billion dollars and DAI at about 4.58 billion in early September. The USDT–USDC duopoly has also eroded slightly, since newer entrants have chipped away at the combined share over the past year.

Distribution across blockchains

Supply is heavily concentrated on a few networks. Ethereum carries roughly 49% of stablecoin supply and Tron is second at roughly 31%, according to August DefiLlama data. Other figures put Tron nearer 29 percent, so the shares shift with methodology. Behind these two, Solana, BNB Chain, Hyperliquid, Base, Arbitrum and Polygon each hold a few percent or less. Solana has grown quickly: its supply reached 16.7 billion dollars by August 9, 2026, an eleven-fold increase over three years, which placed it third among networks.

Issuer choices and network economics both shape these patterns. USDT accounts for more than 95% of Tron's stablecoin supply, and Tron's popularity is often attributed to low transfer costs, which matter more to users in emerging markets than the brand of the chain. Ethereum remains the main settlement layer for the largest issuers and hosts the deepest DeFi liquidity. Issuers are also multi-chain: Tether listed authorized USDT issuance across 16 networks, and Circle's native USDC is issued on more than 15 blockchains. Chain shares can therefore shift quickly. In the third quarter of 2026, Tron's supply rose by 5 billion dollars while Ethereum's fell by 4.9 billion.

Stock versus flow

Market capitalization measures the stock of tokens outstanding, which is not the same as activity. Supply is a stock, while transfer volume measures the amount of value moving through a chain over a period. Transfer volume is much larger than supply: stablecoin transfer volume reached about 33 trillion dollars in 2025, but actual payments volume is much smaller than gross transfer volume. Trading volume tells yet another story, with USDT accounting for about 74% of stablecoin trading volume on centralised exchanges. On-chain measures also have limits. Raw figures can be inflated by wash trading, which is why analysts sometimes use adjusted series that filter it out. Some chain-level numbers have not been independently confirmed by a second analytics provider. Stock figures can also double-count bridged tokens, and on-chain data cannot show where reserves are held or who controls off-chain redemptions, so market size and activity should be read together with methodology notes.

Uses and economic functions

Trading collateral and settlement on exchanges

Most stablecoin activity happens inside crypto markets. Traders use these tokens as quote currency, margin, and a parking place between volatile assets, so they rarely need to convert back into bank money. A 2026 industry tally puts the value settled through stablecoins for trading in the first half of the year at about 21.9 trillion dollars. Traditional-finance-linked products rose from 1.7% to around 12% of stablecoin-settled trading volume over the same period, even as crypto volumes contracted. Tether's USDT is the dominant exchange token: one analysis says it accounts for about 74% of trading volume on centralized exchanges, a larger share than its share of supply.

Raw on-chain figures overstate the economic footprint, however. Allium's September 2026 report counts roughly 85 trillion dollars of transfers from January to August 2026, but only about 4.0 trillion remained once exchange-internal, DeFi and infrastructure movements were excluded. Within that adjusted total, trading accounted for about 69%, store of value about 13%, and payments up to 13%. A BCG analysis of 2025 data reached a far lower estimate of genuine activity, around 7% of transfer volume. The gap reflects different methods for separating trading and routing from payments, not agreement on a single number.

Payments, remittances and treasury transfers

Outside exchanges, the main functions are payment and settlement. Business-to-business transfers form the largest payment category, at roughly 137 to 153 billion dollars in the Allium estimate, and they show the highest cross-border share of any payment type, at about 43%. Other industry reports describe fast growth in corporate use for supplier payments, payroll and intercompany settlement, though those figures come from commercial research with differing definitions. A 2026 academic survey of retail payments estimated that in 2024 about 5–10% of stablecoin transaction volume, roughly 1.3 trillion dollars, reflected real economic activity such as cross-border remittances, corporate treasury operations and retail payments.

Remittances are a particular focus because traditional channels are slow and costly. Industry guides citing World Bank data state that fees on remittance corridors into Sub-Saharan Africa still exceed 6%. Stablecoin transfers can reduce these costs, but the savings depend on the on- and off-ramps at each end, which often involve local banks, exchanges or payment agents. This is why much of the real-economy volume is concentrated in the hands of specialized intermediaries rather than in consumer-facing transfers.

Dollar savings in high-inflation economies and capital-controlled markets

In economies with sustained inflation, currency depreciation or limited access to banking, stablecoins are used less for their speed than for the value they hold. One review describes the primary appeal as access to a relatively stable unit of account and store of value, and notes that dollar-pegged tokens serve as de facto instruments of value preservation in markets such as Turkey and Nigeria. Households can effectively hold a digital dollar account that protects value against local currency depreciation.

The pattern shows up in remittance flows as well. Recipients may hold USDT or USDC as dollar-denominated savings and convert only when they need local currency. Nigerian freelancers paid by foreign clients have reportedly received USDT to avoid the spread that a naira bank conversion would impose. Such use is difficult to measure precisely, and much of the evidence comes from surveys, industry reports and platform data, which are not always independent. Attributed payment volume also skews toward emerging markets and international trade hubs.

Decentralized finance: collateral, lending and yield

In decentralized finance (see DeFi), stablecoins act as the unit of account. Without an asset that reliably holds one dollar, no lending protocol can price collateral, no liquidity pool can quote reliable rates, and no yield strategy can calculate meaningful returns. Protocols use dollar pegs to denominate loans, fees and yield in predictable terms. Borrowers typically post collateral, often crypto like Ether and Bitcoin, and pay interest for access to liquidity, and borrowing rates move with demand; one industry guide notes they can rise to about 10% APY in active markets and settle closer to 3% in quieter periods.

Stablecoin holders can earn yield by supplying tokens to these markets. The BIS notes that yield generation often involves re-lending to borrowers, margin pools, arbitrage or derivatives collateral, or facilitating their use in decentralised finance lending protocols, and warns that such practices may blur the lines between payment instruments and investment products. Yield-bearing stablecoins reportedly grew from about 9.5 billion dollars to more than 20 billion dollars in 2025, though that figure comes from a commercial research site.

These links create new channels of risk. Industry analyses list the main risks of such yield as loss of peg, smart contract failures, counterparty exposure and impaired exits. Liquidations can also spread stress: one commentary describes how an April 2026 exploit involving a collateral token triggered $5.5B in stablecoin withdrawals from Aave in two weeks. Centralized lending carries its own dangers. Counterparty failure in the 2022 crypto lending collapses proved catastrophic, and in such cases withdrawals can be frozen. These episodes show that stablecoins provide a useful settlement and accounting layer, but that the credit, liquidity and operational risks of the services built on top of them are concentrated and can transmit stress quickly.

Failure modes, runs and risk channels

Runs and maturity mismatch

A fiat-backed stablecoin promises holders redemption at par on demand, but its reserves are held in assets with different maturities and liquidity. That gap makes the issuer vulnerable to a bank run in its own form. If many holders redeem at once, the issuer must sell reserves quickly, and a forced sale can realize losses or depress prices in the short-term funding markets where those assets trade. The strength of this channel depends on how liquid the reserve pool is at the moment of stress, which is why liquidity and collateral quality matter as much as the headline reserve total.

The March 2023 episode showed the mechanism clearly. Circle disclosed that some $3.3 billion worth of the cash reserves that back USDC remain held at Silicon Valley Bank, after the bank had been shut down. Concerned investors redeemed over $1 billion of USDC tokens over Friday, causing USDC to temporarily lose its dollar peg on some exchanges and pushing the largest stablecoin swap pool on the decentralized exchange Curve into heavy imbalance. The token's low point was as low as $0.88 early Saturday, according to market tracker CoinGecko. Federal Reserve staff treat the episode as a March 2023 Stablecoin Run in their analysis. The stress eased after U.S. authorities announced that depositors at the failed banks would be made whole, and the $3.3B USDC reserve deposit held at Silicon Valley Bank, about 8% of the USDC total reserve, will be fully available when banks reopened.

Operational, custody and banking-partner risk

For fiat-backed issuers, the reserve pool is only as reliable as the institutions that hold it. One analysis lists dependence on third-party custodians of reserve assets (some of which may not be subject to robust oversight), disruption or delays to redemption processes, problems with cross-chain bridges (often reliant on third-party technology) and hacking or disruption of cryptographic key infrastructure among the main operational threats. Concentration is a specific concern: the USDC reserve disclosures show that the issuer's cash was spread across several banks, including Silicon Valley Bank, Signature Bank and Silvergate, and the failure of one of them was enough to create a visible peg break. Key management also matters. Where an issuer's on-chain holdings are controlled by a single key, an attacker only needs to access a single private key to drain the protocol's reserves.

Smart-contract, oracle and bridge risk

On-chain designs add failure points that do not exist in a bank account. Code defects are one; bugs such as reentrancy loops and arithmetic errors can drain funds or cause systems to behave unpredictably. Designs that rely on external prices also face oracle risk: if an attacker can distort the data the stablecoin relies on, even briefly, they can cause forced liquidations or mispriced minting.

Cross-chain bridges have been the largest single source of losses. Between February and August 2022, three cross-chain bridge exploits drained over $1.1 billion from crypto protocols. In the Ronin case, the loss came from compromised validator keys, while the Nomad loss followed from a configuration error introduced during an upgrade. The damage to stablecoins takes a specific form: when the locked collateral on the source chain is drained, the wrapped tokens on the destination chain are left without collateral support. In some attacks the bridge issues tokens without any deposit. Chainlink describes this as an "infinite mint" problem: token supply increases without a matching increase in reserves. One industry tally puts bridge hacks at over $2 billion in stolen funds between 2021 and 2023, representing 69% of all crypto theft in 2022 alone.

Misreporting, fraud and loss events

Less regulated issuers have repeatedly shown that the reserve claim cannot be taken on trust. The most cited case is Tether. In February 2021 it reached a settlement with the NY AG over allegations that it didn't hold enough reserves to back USDT at one-to-one, while stating it did. The New York Attorney General's office had also alleged Tether and sister company Bitfinex had attempted to cover up the loss of approximately $850 million in customer funds. The settlement involved a payment and no admission of wrongdoing, but it required Tether publishes a breakdown of its reserves at least quarterly. The early disclosures showed a heavy reliance on commercial paper: about 50% of its reserves were held in commercial paper in the first attestation, compared with a much lower share later, and Investigations by Bloomberg and CoinDesk found that Tether's 2021 reserves included securities issued by Deutsche Bank, Barclays Bank, and several prominent state-owned Chinese companies. Tether has argued that its reserves are liquid and high quality, and that it has since reduced commercial paper holdings. Episodes like these shaped later demands for reserve composition disclosure, custody rules and supervision in the regulatory frameworks discussed elsewhere in this entry, and they are a central reason why information asymmetry and moral-hazard are seen as core issues in stablecoin governance.

Regulation in the United States

The main federal statute is the Guiding and Establishing National Innovation for U.S. Stablecoins Act, usually called the GENIUS Act. It was signed into law on July 18, 2025, and one law firm describes it as the first major U.S. legislation regulating cryptocurrency. The act does not regulate tokens by their technology. It defines a "payment stablecoin" and a "permitted payment stablecoin issuer", and it limits who may issue such tokens in the country. Under the act, only "permitted payment stablecoin issuers," meaning banks, approved nonbanks, or qualified state issuers, may legally issue payment stablecoins in the U.S. Insured depository institutions and their subsidiaries form the core of the eligible group, alongside specifically approved nonbank entities (a category that principally includes insured depository institutions, their subsidiaries, and specifically approved non‑bank entities).

The statute sets several substantive obligations. Issuers must hold 1:1 high‑quality, liquid reserves backing outstanding stablecoins, and reserve assets may include Treasury notes and bonds only if they mature within 93 days or less. Holders have a right to redemption at par, and issuers may not pay holders interest or yield simply for holding or using the token. That prohibition binds issuers rather than every firm in the distribution chain, which is why exchanges and affiliates remain a contested area (the exchange and affiliate gap that the OCC's proposed rule and the pending CLARITY Act would each close, on different terms).

Implementation has lagged. The act assigned rulemaking to several agencies, including the OCC, FDIC, Federal Reserve, NCUA and Treasury, and in many cases these regulations were due no later than one year after enactment, by July 18, 2026. That deadline passed without final rules: as of July 18, 2026, ten notices of proposed rulemaking had been issued across the federal agencies and none had been finalised. The proposals include the OCC's February 2026 rule, the FDIC's April 2026 proposal, Treasury's August 2026 licensing rule, and the Federal Reserve's companion proposals published in late September 2026. As of early October 2026, none of those four regulators (the OCC, the FDIC, the Federal Reserve and the NCUA) had issued one final rule, according to one tracker. The OCC reportedly indicated in August 2026 that the OCC is targeting November for its final rule. The proposals differ in detail. The FDIC proposal, for example, would provide that deposits held as reserves backing a payment stablecoin would not be insured to payment stablecoin holders on a pass-through basis.

The effective date follows a dual trigger. The act takes effect on the earlier of 18 months from enactment (i.e., January 18, 2027) and 120 days after the date on which the primary federal payment stablecoin regulators issue any final regulations implementing the statute. Because no final rules were issued by the one-year mark, the January 18, 2027 date applies. Scale determines the supervisory path. A nonbank issuer organized under state law may opt into state supervision while it stays at or below $10 billion in outstanding issuance, and any nonbank entity established under state law and approved by a state regulator to issue payment stablecoins that has over $10 billion in total outstanding payment stablecoin issuance will be required to "transition" to federal regulation, unless the OCC waives this. The act's reserve and redemption design also means purely algorithmic tokens, which hold no reserves to back redemption, fall outside its permitted categories. This is an inference from the reserve requirement rather than an explicit statement in the sources reviewed.

Several questions remain open. The FDIC proposal addresses how deposit insurance applies to stablecoin reserve assets, and clarifies how tokenized bank deposits should be treated, which bears on whether tokenized deposits fall inside or outside the stablecoin category. The treatment of yield offered through intermediaries depends on legislation still in progress, as noted above. Foreign issuers face a separate track: from 18 January 2027 only licensed issuers may issue payment stablecoins in the US, and platforms may not make foreign-issued stablecoins available unless the foreign issuer can comply with lawful orders, while the broader restriction on offering tokens to U.S. persons applies from 18 July 2028. How these provisions interact with national jurisdiction and with pending legislation will shape the final perimeter of the regime.

Regulation in other jurisdictions and international standards

The European Union: MiCA

The EU's Markets in Crypto-Assets Regulation (MiCA), Regulation (EU) 2023/1114, is the most comprehensive regional regime. It does not treat "stablecoin" as a legal category. Instead it sorts tokens into two classes. E-money tokens (EMTs) reference one official currency, such as the euro or the US dollar, so they cover single-currency dollar coins. Asset-referenced tokens (ARTs) reference a basket of currencies, commodities, crypto-assets or other rights. Algorithmic tokens do not get a third category and must still fit one of these two. The split matters because the rules diverge. EMT issuers must be authorised credit institutions or electronic money institutions and must offer redemption at par in the referenced currency. ARTs require national-authority approval of their white paper before a public offer, must keep a segregated reserve held with qualified custody, and face higher own-funds requirements, calculated as the highest of a fixed EUR 350,000 floor, 2% of the average reserve, or 25% of fixed overheads. The stablecoin titles have applied since 30 June 2024, and the wider framework has been in full effect since 30 December 2024.

MiCA also limits distribution. Authorised crypto-asset service providers, such as exchanges and custodians, may not offer non-authorised stablecoins to EU retail customers. The restriction attaches to the trading venue rather than to the token, so self-custody and decentralised finance remain largely outside its perimeter.

Hong Kong, Singapore, Japan and the United Kingdom

Hong Kong's Stablecoins Ordinance (Cap. 656) took effect on 1 August 2025 and makes issuing fiat-referenced stablecoins a licensed activity, with the Hong Kong Monetary Authority (HKMA) as licensor. The regime requires reserves equal to at least 100% of tokens in circulation, held as high-quality segregated assets, redemption within one business day, and minimum paid-up capital of HK$25 million. It also reaches HKD-referenced issuance outside the territory, and retail offers are limited to licensed issuers. Of 36 applications, the HKMA granted two licences on 10 April 2026, to Anchorpoint Financial and HSBC.

Singapore's framework for single-currency stablecoins, administered by the Monetary Authority of Singapore, requires issuers to hold high-quality liquid reserves and to honour par redemption within a short fixed period, typically five business days. Japan's Payment Services Act amendments, effective from 2023, restrict stablecoins to yen-type and other fiat-denominated instruments and confine issuance to licensed banks, trust companies and fund-transfer providers. The UK, by contrast, remained at the proposal stage in the Financial Stability Board's 2025 review, so its final rules for sterling stablecoins should be checked against the latest publications. The practical differences lie mainly in who may issue, how fast redemption must occur, and what counts as eligible backing.

International standard setters

The Financial Stability Board (FSB) set out a global framework for crypto-asset activities in 2023, including recommendations for stablecoin arrangements. Its October 2025 thematic peer review found that implementation remained incomplete, uneven and inconsistent, and that stablecoin rules were more fragmented than the rules for crypto-asset service providers. The Bank for International Settlements (BIS) reached a similar conclusion, noting that differences between jurisdictions in redemption and custody requirements, disclosure timing and reserve frameworks create difficulties for arrangements that operate across borders. It also judged cross-border cooperation to be fragmented and insufficient for a market that is global by nature. The FSB has separately warned that foreign-currency-pegged stablecoins used in emerging market economies can pose cross-border financial stability risks, and that data gaps make these activities hard to measure. The IMF and IOSCO have also published analysis of stablecoin risks, including monetary-sovereignty, market-integrity and investor-protection concerns, but their work is largely advisory and does not bind national supervisors.

Divergence and the challenge of supervising global tokens

A stablecoin is often issued in one jurisdiction, has its reserves held with custodians in a second, and is used by people in a third. An example highlighted by the FSB is a stablecoin whose users are mainly in Brazil, whose reserves are denominated in US dollars, and whose issuance and custody are located elsewhere. Each authority may approach such an arrangement independently, and the FSB has noted that some jurisdictions have restricted multi-jurisdictional arrangements while others permit them under study. This creates room for regulatory arbitrage, in which issuers choose the licensing regime with the least demanding reserve or redemption terms, and it makes a single point of failure possible if one jurisdiction takes unilateral action. Stronger supervisory cooperation, including information sharing and consolidated oversight, is the principal remedy proposed by international bodies, but it remains incomplete.

Monetary and financial stability debates

Stablecoin issuers have become significant buyers of short-dated government debt, and this has drawn attention from monetary policymakers. A senior U.S. Treasury official has put the holdings of stablecoin providers at nearly $200 billion of bills and other near-maturity Treasuries (Stablecoin providers own nearly $200 billion of Treasury bills and other close-to-maturity Treasuries). The reserve mechanics explain why. Fiat-backed issuers invest their reserves in the safest, most liquid short-term instruments available, which means US Treasury bills. A BIS working paper estimates that stablecoins bought roughly $35 billion of bills in 2025, a volume comparable to the largest government money market funds (stablecoins bought nearly $35 billion of T-bills in 2025, on par with the largest government money market funds). Projections of future growth vary widely. A Federal Reserve staff compilation of private estimates ranges from $1 trillion and $3 trillion by the end of the decade, and Standard Chartered expects the market to reach $2 trillion by 2028, which it links to roughly $1 trillion in new Treasury bill demand. Within the Federal Reserve, one governor has argued that this demand could push down the long-run equilibrium real interest rate, which is a key input for monetary policy (a substantial and long-term force putting downward pressure on a crucial guideline for monetary policymakers known as r*). Analysts also disagree on the net effect. Much depends on whether new stablecoin balances come from abroad or displace holdings in other money market instruments, since the latter would dampen net new demand.

A second debate concerns bank funding. Stablecoins could act as a potential substitute for bank deposits that could reduce banks' deposit base as the stablecoin market grows. Estimates of the possible scale are wide. Citigroup research cited in U.S. policy discussions suggests that growth to between $0.5 and $3.7 trillion by 2030 could displace deposits worth $182-$908 billion. Whether this happens depends on the reserve strategy of issuers. A Federal Reserve note observes that the threat to deposits depends on the extent to which stablecoin issuers deposit reserves at banks or purchase Treasury bills from dealers who then redeposit proceeds in banks. Deposit outflows could matter because banks use short-term deposits to fund long-term loans, and a large-scale shift away from deposits might raise the cost and reduce the supply of credit to households and businesses. Some industry analysts, by contrast, argue that stablecoin adoption has not produced meaningful aggregate outflows from traditional bank deposits, and that the current float is small relative to total deposits.

Concerns about monetary sovereignty are most pronounced in emerging economies. The IMF has observed that stablecoin inflows are larger precisely in environments with high inflation, exchange rate volatility and weak policy credibility. It also warns that stablecoins may make it easier to circumvent capital flow management measures, which could amplify outflows in periods of stress and put pressure on exchange rates. A July 2026 BIS working paper covering more than 130 economies finds that unlike traditional bank deposits, stablecoin flows showed little response to capital controls or other FX restrictions, which the authors attribute to stablecoins partly circulating outside the regulatory perimeter. The same study finds little evidence that deposit dollarization weakens the transmission of monetary policy, though higher foreign-currency deposits were associated with a somewhat greater risk of elevated inflation. The scale is also still limited. Estimated gross flows into the two largest dollar stablecoins rose from about $12 billion in early 2020 to $316 billion in the first quarter of 2025, but analysts note that this does not prove that local currencies are being displaced wholesale.

The broader debate divides along lines of run risk and payment efficiency. Supporters emphasize that regulated, fully reserved tokens can reinforce rather than weaken bank intermediation, and that their demand for safe assets can deepen these markets. Critics focus on the absence of public backstops. Because stablecoins do not have federal guarantees or Federal Reserve discount window access, policymakers might be pressed to provide ad hoc bailouts, as occurred during money market fund runs in 2008 and 2020. Industry critics have also warned that forced asset sales by issuers during a redemption wave could spread stress through the wider financial system (the issuers would also liquidate their other assets, putting pressure on the financial system more broadly). The absence of a lender of last resort, the vulnerability to bank runs-style redemption waves, and gaps in consumer protection remain the central concerns of regulators, while proponents see stablecoins as a means of cheaper and faster payments and as a source of additional dollar demand that supports the role of the dollar abroad.

Comparison with CBDCs, tokenized deposits and future directions

Stablecoins and central bank digital currencies

The main contrast is about who stands behind the liability. Stablecoins are privately issued money. In this sense, they resemble bank deposits and differ from central bank money, such as cash, reserves or CBDC. A central bank digital currency (CBDC) would be a direct liability of the central bank, while a stablecoin's redemption right depends on its issuer and its reserves.

The design choices differ on several other dimensions. The digital euro is a case in point. The ECB has said it will not decide whether to issue the digital euro until the regulation establishing it has been adopted, and the Eurosystem expects the trilogue negotiations to be concluded in a timely manner and the legislation to be adopted by the end of 2026. If EU legislation is adopted in 2026, the Eurosystem aims to be ready for a potential first issuance by 2029, with testing beginning from mid-2027. On privacy, the online and offline versions are mandated, with the offline variant designed to mirror the privacy characteristics of physical cash. The proposal also includes a maximum balance limit per user, a feature that private stablecoins do not carry in the same form. Programmability is the reverse case: stablecoins are often described as better suited to programmable and cross-border use, whereas a CBDC is more likely to serve as the base unit of account in the digital asset ecosystem.

Tokenized deposits

A tokenized deposit is a bank liability recorded on a programmable ledger rather than a separate token. The BIS describes these as a direct claim on the issuing bank and are redeemable at par for central bank money of the same currency. This structure gives tokenized deposits the protections of ordinary deposits. Tokenized deposits inherit the deposit insurance while payment stablecoins do not.

In the United States, the GENIUS Act keeps the two categories apart. The Act expressly excludes deposits, including deposits recorded using distributed ledger technology, from the payment-stablecoin definition. Because of this, tokenized deposits can pay interest because they are deposits, while issuers of stablecoins are prohibited from paying "interest or yield" to individuals holding payment stablecoins. The FDIC's April 2026 proposal would confirm that the availability of deposit insurance does not depend on the technology or recordkeeping used to record a bank's deposit liabilities. In the EU, one industry comparison places stablecoins under the e-money token category and tokenized deposits under ordinary bank deposit rules, which is consistent with how banks are supervised there, though the treatment is not fully settled in every national setting.

Singleness of money and the BIS position

The BIS has argued that the choice between these instruments matters for the monetary system as a whole. In a 2023 bulletin, it stated that private tokenised monies that circulate as bearer instruments, like stablecoins, may entail departures in their relative exchange values away from par in violation of the "singleness of money". By contrast, in the tokenised deposit model, settlement in central bank money preserves singleness, under which claims denominated in that unit are redeemable at par with central bank money with finality. A 2026 BIS speech reached a similar conclusion, favouring a system built on tokenised deposits while acknowledging its challenges.

Interoperability and pilot projects

Interoperability remains a practical gap for both models. Fiat-referenced stablecoins mostly circulate on public blockchains, and even the "same" stablecoin on different chains is not interoperable without risky or costly workarounds. Tokenized deposits typically run on permissioned platforms, which creates a different set of coordination problems. Public-sector pilots are trying to address these gaps. In the EU, the Pontes initiative aims to create an interoperable European Distributed Ledger Technology (DLT) system, which will connect existing DLTs and certain core "target services", and it is currently scheduled to go live towards the end of 2026. Wholesale projects such as BIS Project Agora explore two-tier architectures in which central bank money anchors settlement between commercial banks.

Open questions

Several questions are unresolved. The first is market structure: 99.4% of fiat-backed stablecoins (by market valuation) are pegged to the US dollar, which raises questions about monetary sovereignty if that concentration persists. The second is whether any peg design can avoid run risk. The BIS argues that there is no mechanism that enforces singleness for bearer-like stablecoins, which leaves redemption confidence as the key safeguard. The third concerns monetary policy: if stablecoins substitute for cash or deposits, part of the seigniorage generated by cash issuance may shift to private issuers. Data ownership could shift as well, since in retail settings data ownership would shift from banks to stablecoin issuers. How central banks would adjust their monetary policy tools and their role in settlement under these conditions is still an open question.

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