Stablecoins
Updated
Summary
A stablecoin is a token on a blockchain that its issuer promises to redeem for a fixed amount of money, almost always one US dollar. The issuer holds reserves, mostly short-dated US Treasury bills, repos, money-market funds and bank deposits, and earns the interest on them; holders usually earn nothing. About 99% of fiat-backed stablecoins by value are pegged to the dollar, per the BIS. Two issuers dominate: Tether (USDT, about $185 billion at mid-2026) and Circle (USDC, about $73 billion). A long tail of smaller coins includes bank-chartered entrants such as Ripple's RLUSD. Stablecoins began as the cash leg of crypto trading and are now also used for cross-border payments and as collateral. In the US, the GENIUS Act of 2025-07-18 created the first federal licence for payment stablecoins; in the EU, MiCA treats dollar and euro coins as e-money tokens.
Key numbers
Total stablecoin market cap, mid-2026 (Fed note; BIS): $317 billion (6 Apr); about $320 billion (end-May) (as of 2026-05-31). Source: bis.org
Share of fiat-backed stablecoins pegged to the US dollar (BIS): about 99.4% (as of 2026-06-23). Source: bis.org
USDT issued / Tether excess reserves (Q2 attestation): about $184.6 billion / $4.11 billion (as of 2026-06-30). Source: tether.io
USDC in circulation (Circle Q2): $73.3 billion (+19% y/y) (as of 2026-06-30). Source: circle.com
Issuer economics, Q2 2026: Circle reserve income vs distribution costs; Tether operating profit: $668 million vs $412 million; about $1.5 billion (as of 2026-06-30). Source: circle.com
T-bills and near-maturity Treasuries held by stablecoin providers (Treasury): nearly $200 billion (as of 2026-09-22). Source: home.treasury.gov
Higher-quality reserves per coin: USDT vs USDC (Fed note): about 0.74x vs 1.0x (as of 2026-04-08). Source: federalreserve.gov
GENIUS Act: max Treasury maturity for reserves / state-regime ceiling: 93 days / $10 billion outstanding (as of 2025-07-18). Source: govinfo.gov
GENIUS Act and OCC final rule effective date: 2027-01-18 (as of 2026-10-21). Source: occ.gov
Estimated stablecoin transaction volume, 2025 (BIS; gross): about $28 trillion (as of 2026-06-23). Source: bis.org
E-money tokens notified under MiCA (EBA): 45 (USDC the first significant) (as of 2026-10-14). Source: eba.europa.eu
Timeline
2026-10-21 — OCC issues the first final GENIUS Act rule (12 CFR Part 15), effective 2027-01-18; AML/sanctions left to a separate rulemaking. (Source: occ.gov)
2026-10-21 — OCC sets waiver and application guidance: existing issuers need a substantially complete application by 2027-01-18 to keep operating. (Source: occ.gov)
2026-10-14 — EBA classifies USDC as the EU's first significant e-money token; EBA reserve supervision starts 2026-11-12. (Source: eba.europa.eu)
2026-09-24 — Federal Reserve proposes reserve, capital and application rules for Board-supervised issuers; comments close 2026-11-30. (Source: federalreserve.gov)
2026-09-22 — Treasury Deputy Secretary Brooke: stablecoin providers own nearly $200 billion of bills and near-maturity Treasuries. (Source: home.treasury.gov)
2026-09-15 — Senate cloture on the motion to proceed to H.R. 3633 (CLARITY) fails 49-50. (Source: senate.gov)
2026-08-17 — Treasury proposes the GENIUS section 3 rule defining US issuance and offer or sale. (Source: home.treasury.gov)
2026-08-07 — IMF's Katz: market about $300 billion and flat for a year; warns of dollarization in emerging markets. (Source: imf.org)
2026-08-05 — Circle reports Q2 2026: USDC $73.3 billion, reserve income $668 million. (Source: circle.com)
2026-07-31 — Tether publishes Q2 2026 attestation: about $184.6 billion USDT, $4.11 billion excess reserves. (Source: tether.io)
2026-06-23 — BIS Annual Economic Report: current stablecoin designs fall short on the foundational properties of money. (Source: bis.org)
2026-05-08 — ECB's Lagarde argues for tokenised money anchored in central-bank money rather than euro stablecoins. (Source: ecb.europa.eu)
2026-04-08 — FinCEN and OFAC propose the GENIUS Act AML and sanctions rule for issuers. (Source: home.treasury.gov)
2026-04-08 — Fed staff note: supply $317 billion on 2026-04-06 after about 50% growth in 2025, then flat. (Source: federalreserve.gov)
2026-04-07 — FDIC proposes GENIUS requirements for its issuers, including pass-through insurance for reserve deposits. (Source: fdic.gov)
2026-04-01 — Treasury issues its first GENIUS proposed rule, on state-regime principles for issuers up to $10 billion. (Source: home.treasury.gov)
2026-02-25 — OCC proposes its GENIUS Act rule (published 2026-03-02, 91 Fed. Reg. 10202). (Source: occ.gov)
2025-12-12 — OCC conditionally approves five crypto trust banks, including Circle's and Ripple's, plus Paxos's conversion. (Source: occ.gov)
2025-07-18 — GENIUS Act becomes Public Law 119-27, creating the federal payment-stablecoin framework. (Source: govinfo.gov)
Key actors and links
USDC (asset:crypto-usdc): Circle's dollar stablecoin, the second largest (about $73 billion) and the EU's first significant e-money token.
RLUSD (asset:crypto-rlusd): Ripple's bank-chartered dollar stablecoin, a small entrant compared with USDT and USDC.
Ripple (actor:ripple): RLUSD issuer; Ripple National Trust Bank was conditionally approved by the OCC on 2025-12-12.
U.S. Treasury (actor:us-treasury): Writes GENIUS rules on state regimes, US issuance and, via FinCEN and OFAC, AML and sanctions; tracks stablecoin bill demand.
Federal Reserve (actor:federal-reserve): Proposed its issuer framework on 2026-09-24 (comments to 2026-11-30); its staff flag financial-stability risks.
CLARITY Act (policy:clarity-act): Market-structure bill whose Senate cloture vote failed 49-50 on 2026-09-15; GENIUS covers stablecoins without it.
U.S. Senate (actor:us-senate): Passed GENIUS in 2025; blocked CLARITY's motion to proceed in September 2026.
U.S. Treasuries (market:us-treasuries): Reserves are mostly short bills: providers hold nearly $200 billion, under 1% of Treasuries outstanding.
US dollar (asset:usd): About 99% of fiat stablecoins are dollar-pegged, so growth extends private dollar reach abroad.
Stablecoin settlement volumes (indicator:stablecoin-supply): The supply and settlement measure for this theme: about $301 billion on 2026-10-22, flat since early 2026.
Tokenized deposits (theme:tokenized-deposits): The bank alternative: the FDIC treats qualifying tokenized deposits as deposits, while stablecoins cannot pay yield.
ECB (actor:ecb): Skeptic: Lagarde says euro stablecoins are not an efficient route to euro reach and prefers central-bank-money rails.
BIS (actor:bis): Says current designs fail tests of singleness, elasticity and integrity; urges capital and liquidity rules.
International Monetary Fund (actor:imf): Warns stablecoins can amplify dollarization and capital outflows in emerging markets.
Ethereum network (actor:ethereum-network): A main settlement chain for USDT, USDC and RLUSD; hosting stablecoins does not by itself give its token a role in reserves.
Why it matters now
2026 is the year the rules arrive. The GENIUS Act takes effect on 2027-01-18. From then on, only a permitted issuer may issue a payment stablecoin in the US, and issuing without approval carries criminal penalties. On 2026-10-21 the OCC issued the first final bank-regulator rule under the Act, a new 12 CFR Part 15 covering reserves, redemption, risk management, custody and capital. The Federal Reserve proposed its own framework on 2026-09-24, with comments due 2026-11-30, and the FDIC proposed its version in April. Treasury has proposed rules on state regimes and on what counts as issuing in the US, and FinCEN and OFAC proposed the anti-money-laundering and sanctions rule. In the EU, the EBA named USDC the first significant e-money token on 2026-10-14 and takes over supervision of its reserves on 2026-11-12. Market-structure law did not follow: Senate cloture on the CLARITY Act failed 49-50 on 2026-09-15.
The market itself has stopped growing. Supply rose about 50% in 2025, then flattened. The Fed counted $317 billion on 2026-04-06 and the BIS about $320 billion at end-May; a primary same-day total for October 2026 is UNKNOWN (aggregator dashboards suggest a lower figure, unverified). Growth matters beyond crypto because reserves are mostly T-bills. Treasury says stablecoin providers own nearly $200 billion of bills and near-maturity Treasuries, and expects them to add more as rules are finalized. The business mechanism is a rate spread. Circle earned $668 million of reserve income in Q2 2026 but paid $412 million in distribution and other costs; Tether reported about $1.5 billion of Q2 operating profit. Official skeptics remain. The BIS says current designs fall short on the basic properties of money. The ECB argues Europe should anchor tokenised money in central-bank money, not in euro stablecoins. The IMF warns stablecoins can speed dollarization in emerging markets.
Risks and open questions
Bull case: The licensing gap is closing on a fixed date. The OCC's final rule, Treasury's proposals and the Fed and FDIC proposals all point to 2027-01-18, and the OCC says it generally expects to grant waivers so existing issuers can keep operating while applications are pending. Five crypto trust banks, including Circle's, Ripple's and Paxos's, already have OCC conditional approvals. Treasury expects providers to keep adding to their Treasury holdings as rules are finalized, and the 93-day maturity cap ties reserve growth to the bill market. The EU now has a supervisor for the largest regulated dollar coin: the EBA takes over USDC reserve supervision on 2026-11-12. Issuers remain profitable: Tether reported about $1.5 billion of Q2 operating profit and $4.11 billion of excess reserves. Inference (AA): clear rules could let banks and payment firms that stayed out because of legal risk enter after January, and a federal licence may make stablecoins easier for regulated firms to hold as collateral.
Bear case: Growth has stalled before the rules bite. The Fed counted $317 billion in April, the BIS about $320 billion at end-May; the current October total is UNKNOWN from a primary source (aggregator dashboards, used as leads only, suggest about $300 billion); the IMF called the market roughly flat for a year. Issuer income rides on short rates: Circle's reserve return rate fell 66 basis points year over year, and it paid out $412 million of its $668 million Q2 reserve income in distribution and other costs. The law bans interest paid solely for holding a coin, which leaves stablecoins at a disadvantage to money funds and tokenized deposits for idle balances. Official skepticism is broad: the BIS says current designs threaten financial integrity, the ECB prefers central-bank-money rails, the Fed's own staff say new structures may amplify financial-stability risks, and Governor Barr wants clearer par redemption under stress. The Fed note puts USDT's higher-quality reserves at about 0.74x per coin. Market-structure law failed in the Senate, the AML rule is not final, and the OCC, Fed and FDIC rules may differ for a time. Inference (AA): licensing raises costs and may push some offshore supply to shrink rather than migrate.
Falsifiers: - Growth case fails if total stablecoin supply is still at or below about $300 billion two quarters after 2027-01-18. - Growth case fails if no new bank or nonbank issuer receives OCC, Fed or FDIC approval within the OCC's stated 120-day review window after applications open. - Growth case fails if Circle's Q3 2026 results on 2026-11-04 show USDC circulation falling again from $73.3 billion at end-Q2. - Stall case fails if supply moves back above the mid-2026 peak (about $320 billion) before 2027-01-18. - Stall case fails if the Fed and FDIC finalize rules materially in line with the OCC's before the effective date, and the joint FinCEN/OFAC rule is final. - Fragmentation risk fails if Tether discloses a plan to bring USDT, or a US-licensed product, under the federal framework by the waiver deadline. - AA's 'bill demand' link fails if Treasury reports stablecoin holdings of bills falling from nearly $200 billion while supply holds steady (a shift to deposits or repo).
Value accrual gate: Stablecoin growth accrues first to issuers, through the spread between reserve income on T-bills and repo and the zero yield paid to holders, and then to distributors who share that income (Circle paid out $412 million of $668 million in Q2 2026). Holders get a dollar claim, not a share of that income; the GENIUS Act bars yield paid solely for holding. Stablecoin supply, transfer volume or issuance on a chain is not automatically value for that chain's native token or any other token holder: fees, if any, and token demand must be shown separately for each asset. Regulatory approval of an issuer is not value accrual for any token it is issued on.
What to watch
Circle Q3 2026 results: USDC circulation, reserve return rate and distribution costs. (2026-11-04); Source: circle.com
EBA takes over direct supervision of USDC's reserve of assets, own funds and liquidity in the EU. (2026-11-12); Source: eba.europa.eu
Comment period closes on the Federal Reserve's GENIUS Act proposal (R-1899). (2026-11-30); Source: federalreserve.gov
OCC announces it is accepting applications and waiver requests (after OMB approves the forms). (no scheduled date (before 2027-01-18)); Source: occ.gov
GENIUS Act and OCC rule take effect; prior approval required to issue; waiver-eligibility cutoff. (2027-01-18); Source: occ.gov
FDIC final GENIUS Act requirements rule (proposed April 2026). (no scheduled date); Source: fdic.gov
FinCEN/OFAC final AML and sanctions rule for issuers, the piece the OCC rule leaves out. (no scheduled date); Source: home.treasury.gov
Tether Q3 2026 attestation (Q2 was published 2026-07-31): USDT supply, excess reserves and reserve mix. (2026-10 to 2026-11 (AA expectation)); speculative, no scheduled source
Whether the Senate makes a second attempt at CLARITY market-structure legislation. (no scheduled date); speculative, no scheduled source
Digital asset service providers generally limited to licensed-issuer stablecoins for US persons. (2028-07-18); Source: home.treasury.gov
AA inference
Inference (AA): This node is the hub between the US rulemaking nodes (Treasury, Federal Reserve, CLARITY Act), the issuer nodes (USDC, RLUSD) and the macro nodes (US Treasuries, the dollar). AA reads 2026 as a shift from a growth story to a licensing story: supply is flat near $300 billion while the rules that decide who may issue, what reserves count and how redemption works are being finalized between October 2026 and January 2027. The causal chain AA tracks is: licence clarity, then bank and nonbank entry, then distribution deals, then supply, then reserve demand for short bills. Each link is conditional; only the first is observed so far. The theme strengthens if licensed supply grows after 2027-01-18 and new bank issuers launch; it weakens if supply keeps flat or falls while rates fall, if the yield ban pushes demand to tokenised deposits or money funds, or if the Fed and FDIC rules diverge materially from the OCC's.
Sources
OCC News Release 2026-92, 21 October 2026: the OCC issued a final rule to implement the GENIUS Act covering permitted and foreign payment stablecoin issuers under its jurisdiction and certain custody activities; BSA/AML and OFAC requirements will be addressed in a separate rulemaking with Treasury; the rule and the Act are effective 18 January 2027; Comptroller Jonathan V. Gould described strong standards for reserve backing, redemption and risk management. (Source: occ.gov, accessed 2026-10-22)
OCC Bulletin 2026-50, 21 October 2026: 'The final rule will be effective on January 18, 2027.' Most provisions sit in a new 12 CFR Part 15 (activities, reserve assets, redemption, risk management, audits and reports, custody, applications, foreign issuers, revocation, capital and operational backstop); the OCC proposed the rule on 25 February 2026 (91 Fed. Reg. 10202, 2 March 2026). (Source: occ.gov, accessed 2026-10-22)
OCC Bulletin 2026-51, 21 October 2026: existing US issuers may request a waiver of the prior-approval requirement if a substantially complete application is pending on or before 18 January 2027; the OCC generally expects to grant such waivers, for up to 12 months from that date; issuing without approval after 18 January 2027 carries criminal penalties; the OCC aims to decide applications within 120 days of finding them substantially complete; acceptance begins after OMB approves the forms. (Source: occ.gov, accessed 2026-10-22)
OCC final rule text: redemption provisions refer to a 'two-business-day period'; reserves are held on a 1-to-1 basis; deposit liabilities of institutions that are not insured depository institutions do not qualify as reserve assets; the preamble says capital elements were simplified relative to the proposal. (Source: occ.gov, accessed 2026-10-22)
GENIUS Act, Public Law 119-27 (18 July 2025): permitted reserves include Treasury bills, notes or bonds with a remaining maturity of 93 days or less and repos on such securities (section 4(a)(1)(A)); issuers must publish the monthly composition of reserves, examined monthly by a registered public accounting firm; no permitted issuer may pay holders interest or yield solely in connection with holding, use or retention of the stablecoin (section 4(a)(11)); state-qualified issuers with up to $10 billion outstanding may opt for a substantially similar state regime (section 4(c)). (Source: govinfo.gov, accessed 2026-10-22)
Treasury, 17 August 2026: proposed rule under GENIUS section 3 defining what it means to issue, and to offer or sell, a payment stablecoin in the United States; Treasury expects the Act to take effect on 18 January 2027 and digital asset service providers generally to be limited to licensed-issuer stablecoins for US persons from 18 July 2028. (Source: home.treasury.gov, accessed 2026-10-22)
Treasury, 1 April 2026: first GENIUS Act proposed rule, setting broad-based principles for whether a state regime is substantially similar to the federal framework, for issuers with $10 billion or less outstanding. (Source: home.treasury.gov, accessed 2026-10-22)
Treasury, 8 April 2026: FinCEN and OFAC proposed a joint rule treating permitted payment stablecoin issuers as financial institutions under the Bank Secrecy Act and requiring sanctions compliance programs. (Source: home.treasury.gov, accessed 2026-10-22)
Treasury Deputy Secretary Francis Brooke, 22 September 2026: stablecoin providers 'already own nearly $200 billion of Treasury bills and other close-to-maturity Treasury securities'; as GENIUS rules are finalized, providers may continue to grow and add to their Treasury holdings. (Source: home.treasury.gov, accessed 2026-10-22)
TBAC presentation, February 2026 (slide 15, citing Tether and Circle financials to 30 September 2025): T-bills were 53% of the two issuers' assets, holdings rose about $70 billion since 2022, and stablecoin issuers held less than 1% of Treasuries outstanding. (Source: home.treasury.gov, accessed 2026-10-22)
Federal Reserve Board, 24 September 2026: requested comment on two proposals for Board-supervised payment stablecoin issuers under the GENIUS Act: a framework requiring full backing with permissible reserve assets such as short-term Treasury bills, standardized capital requirements and risk management standards; and an application process for Board-supervised banks. (Source: federalreserve.gov, accessed 2026-10-22)
Federal Reserve proposal R-1899, 'Implementing the Federal Reserve Board's Responsibilities under the GENIUS Act': comment period closes 30 November 2026. (Source: federalreserve.gov, accessed 2026-10-22)
Governor Michael S. Barr, 24 September 2026: 'Stablecoins will only be stable if they can be reliably and promptly redeemed at par in a range of conditions'; he sought input on interest-rate and foreign-currency risk and objected to a 'significant or systemic' standard for AML supervisory action. (Source: federalreserve.gov, accessed 2026-10-22)
FDIC (page dated 7 April 2026): proposed GENIUS Act requirements for FDIC-supervised issuers covering reserves, redemption, capital, risk management and custody; clarifies pass-through insurance for deposits held as reserves; tokenized deposits meeting the statutory deposit definition are treated like any other deposit; 60-day comment period; its first GENIUS proposal (application procedures) was issued 19 December 2025. (Source: fdic.gov, accessed 2026-10-22)
OCC, 12 December 2025: conditional approvals for First National Digital Currency Bank and Ripple National Trust Bank (de novo) and for conversions of BitGo, Fidelity Digital Assets and Paxos Trust Company to national trust banks. (Source: occ.gov, accessed 2026-10-22)
US Senate roll call vote 234 (119th Congress, 2nd session), 15 September 2026: cloture on the motion to proceed to H.R. 3633 (digital commodities market structure) was rejected 49 yeas to 50 nays, with 1 not voting, under a three-fifths threshold. (Source: senate.gov, accessed 2026-10-22)
Federal Reserve FEDS Note, 8 April 2026: aggregate stablecoin market capitalization reached $317 billion as of 6 April 2026 (DefiLlama data), after growth of about 50% in 2025 that flattened in Q4 2025 and Q1 2026; USDT holds about 1.04x reserves per coin but about 0.74x in higher-quality reserves, USDC 1.0x; complex intermediation chains, vertical integration and links to traditional finance 'may amplify financial stability risks'. (Source: federalreserve.gov, accessed 2026-10-22)
BIS Annual Economic Report 2026, chapter III (23 June 2026): stablecoin market capitalisation around $320 billion at end-May 2026; estimated 2025 transaction volume $28 trillion (net figures far lower); about 99.4% of fiat-backed stablecoins by value are dollar-pegged; 'current designs fall short on foundational properties of money and threaten financial integrity'. (Source: bis.org, accessed 2026-10-22)
BIS Annual Economic Report 2026, chapter III: recommends capital requirements for issuers, liquidity requirements for reserves, holder protection and cross-border supervisory cooperation, and warns that large stablecoin holdings of government debt 'may disincentivise necessary fiscal consolidation in the issuing economy'. (Source: bis.org, accessed 2026-10-22)
IMF First Deputy Managing Director Dan Katz, 7 August 2026: market capitalization around $300 billion, nearly tripled between 2021 and 2025 but roughly flat over the past year; nearly 99% dollar-denominated; stablecoins 'can amplify familiar dollarization forces' in emerging markets. (Source: imf.org, accessed 2026-10-22)
ECB President Christine Lagarde, 8 May 2026: stablecoins grew from under USD 10 billion six years ago to over USD 300 billion; nearly 90% of the market is controlled by Tether and Circle; close to 98% is dollar-denominated; a USD 3.5 billion inflow into dollar stablecoins is estimated to lower three-month T-bill yields by about 2.5-3.5 basis points; 'stablecoins are not an efficient way' to strengthen the euro's international appeal. (Source: ecb.europa.eu, accessed 2026-10-22)
EBA, 14 October 2026: classified USDC (issuer Circle Internet Financial Europe SAS) as the first significant e-money token in the EU; the EBA directly supervises its own funds, reserve of assets, liquidity and recovery/redemption plans from 12 November 2026; 45 e-money tokens have been notified under MiCA. (Source: eba.europa.eu, accessed 2026-10-22)
Tether Q2 2026 attestation release (31 July 2026, as of 30 June 2026): about $184.6 billion of USDT issued, total assets $187.75 billion, total liabilities $183.64 billion, excess reserves about $4.11 billion, net operating profit about $1.5 billion led by US Treasury and repo income; more than 146 tons of gold. (Source: tether.io, accessed 2026-10-22)
Circle Q2 2026 results (5 August 2026): USDC in circulation $73.3 billion, up 19% year over year; reserve income $668 million, with the reserve return rate down 66 basis points year over year; distribution, transaction and other costs $412 million. (Source: circle.com, accessed 2026-10-22)
Circle, 7 October 2026: Circle will report third-quarter 2026 results on Wednesday 4 November 2026. (Source: circle.com, accessed 2026-10-22)