The Fed Just Proposed the Stablecoin Rulebook: Full 1:1 Reserves, a 2% Capital Charge — and $312 Billion Is Already On-Chain

On September 24 the Federal Reserve asked the public to comment on two proposals that, together, form the first detailed rulebook for stablecoins issued inside the US banking system. Full one-for-one reserves, a capital charge ladder, a two-business-day redemption promise, weekly reporting — and a sixty-day comment window before the regime that the GENIUS Act locked to January 18, 2027 becomes real.

It arrives at a market that has quietly become enormous. Stablecoin supply now stands at $312.02 billion across 427 tracked assets, and it is 2.8% below its all-time high rather than climbing off a floor. For anyone who moves dollars on-chain — for payments, for trading collateral, for remittances — the rules being written now decide what sits behind the token, how fast it can be redeemed, and what the issuer may pay you for holding it.

What the Fed Actually Released — and Why the Clock Already Matters

The Board's release went out at 2:30 p.m. EDT on September 24 and contains two separate notices of proposed rulemaking. The first sets operating requirements for payment stablecoin issuers under the Board's supervision: reserve composition, capital, risk management, and rules for the firms that safekeep the assets backing the tokens. It also clarifies which stablecoin and related activities Fed-supervised banks may conduct. The second creates an application process for insured state member banks that want approval for a subsidiary to issue payment stablecoins.

The timing is the part worth circling. The GENIUS Act was signed on July 18, 2025 and gave the Fed, the OCC, the FDIC, the NCUA and the Treasury secretary one year to finish implementing rules. That deadline, July 18, 2026, passed. The statute then starts the regime at the earlier of January 18, 2027 or 120 days after the responsible agencies finalise their rules — and because a rule finalised after September 20, 2026 can no longer make a 120-day window close before January, the January date is now the operative one. Comments close 60 days after the notices are published in the Federal Register, which is a later date than September 24.

The One-to-One Rule: What Is Now Allowed to Back a Stablecoin

The core of the first proposal is a full-backing standard. A Fed-supervised issuer would have to hold reserve assets that, in aggregate and at all times, have a fair value that equals or exceeds the par value of its outstanding payment stablecoins — the one-to-one requirement in the Board's staff memo. Slightly less than fully backed becomes a reportable event: the issuer must notify the Fed, then liquidate reserves and redeem outstanding tokens unless it can promptly return to compliance.

The permissible reserve list is deliberately narrow. It runs to US dollar cash, balances at a Federal Reserve Bank, demand deposits at insured depository institutions, Treasury securities with a remaining maturity of 93 days or less, overnight repurchase agreements backed by Treasuries, and eligible investment funds — or tokenised versions of those assets. Principles-based diversification standards sit on top, so a single issuer cannot lean entirely on one counterparty or one maturity bucket.

Around that core sit the operating rules that matter to a holder: redemption in no more than two business days, weekly confidential reporting to the supervisor, at least annual full-scope examinations, limits on insider and affiliate transactions, and information technology and security program standards. In plain terms, a regulated dollar token starts to look less like a promise and more like a product with a settlement SLA.

The Capital Ladder: 2% Up Front, Then 2 / 1.5 / 1 Percent

Capital is standardised rather than bank-style risk-weighted. The proposal applies a 2% charge to reserve assets held as uninsured deposit claims or undercollateralised reverse repurchase agreements, plus a graduated operational-risk charge of 2.0% on the first $20 billion of outstanding stablecoins, 1.5% on the next $30 billion, and 1.0% above $50 billion — and a charge equal to 25% of an issuer's three-year average non-reserve revenues. An issuer that misses minimum capital at quarter-end must file a plan to return to compliance; persistent shortfalls force liquidation of reserves and redemption of tokens.

The second half of that package is the part crypto will feel. The proposal implements the GENIUS Act's prohibition on paying yield or interest solely in connection with the holding, use or retention of a payment stablecoin, and it applies the statute's anti-tying rule to every permitted issuer regardless of which regulator supervises it. A bank-issued dollar token is a payments instrument, not a deposit account, and the yield hunt stays outside the regulated wrapper.

Notice the shape of the ladder, too. Operational capital per dollar of outstanding supply is 2.0% for the first $20 billion, 1.5% on the next $30 billion and 1.0% above $50 billion — so the framework is proportionally gentler on large issuers than small ones. Combined with the two-day redemption and weekly reporting duties, the draft nudges the market toward fewer, bigger, more transparent dollar tokens.

Who This Covers — and the Bank Application Path

The Fed's slice is narrow but strategically placed. Board-supervised permitted payment stablecoin issuers are subsidiaries of insured state member banks approved by the Board, plus state-qualified issuers that are uninsured state-chartered depository institutions with $10 billion or more of outstanding stablecoins and that transition to the Board's framework. The same proposal covers Board-supervised custodians of reserve assets, amends the Board's capital rule so parent banks deconsolidate their stablecoin subsidiaries, and clarifies that state member banks and holding companies may engage in stablecoin-related activities.

The two largest dollar issuers sit outside this particular draft — their charters are handled by the OCC and by state regulators, and the federal agencies put their own implementation proposals out in April. What the Fed is doing here is filling in the bank-supervised lane and putting a floor under reserve quality for the institutions most likely to issue next.

For those banks, the second proposal is a route in. The bank itself applies by letter to its Federal Reserve Bank, submitting a business plan, financial information, relevant policies and procedures, capital structure documentation, biographical reports and certifications. The Fed has 30 days to tell an applicant whether the filing is substantially complete, and once it is, the statute gives the Board 120 days to decide — a complete application is deemed approved if that window lapses, which is a real incentive for the agency to move.

Stablecoins will only be stable if they can be reliably and promptly redeemed at par in a range of conditions. — Governor Michael S. Barr, statement on the proposed framework

The $312 Billion On-Chain — and What the Data Already Suggests

Here is the market these rules would govern, per DefiLlama's stablecoin data on September 25. Total supply is $312.02 billion: up $1.33 billion in a day, $2.80 billion in a week, $3.56 billion in 30 days (+1.15%) and $17.54 billion over the year (+5.96%). The record high is $321.09 billion, set on May 20, 2026 — so the market is still 2.8% under its peak, not extended.

USDT remains the anchor at $183.73 billion, and its geography says a lot about who actually uses dollars on-chain: 50.4% of it sits on Tron ($92.64 billion) against 39.8% on Ethereum ($73.21 billion), with BSC at 5.0% ($9.18 billion) and Solana at 1.5% ($2.67 billion). USDC is the fast mover — $75.34 billion, up $1.46 billion in 30 days and $1.42 billion of that in the last seven days alone — spread across Ethereum ($46.44 billion), Hyperliquid L1 ($7.54 billion), Solana ($7.49 billion) and Base ($4.31 billion).

Newer names are compounding faster than the incumbents: USDe at $4.92 billion, up 20.7% in 30 days; USD1 at $4.41 billion, up $337 million; RLUSD at $2.47 billion, up 18.7%. And the split that matters most for this rulemaking is the one between payments coins and yield wrappers — tokenised money-market products shrank on the month, with BUIDL down 24.1% to $2.11 billion and USYC down 18.0% to $2.40 billion, while payments-first stablecoins added supply.

Zoom out and dollar tokens are now roughly 10.3% of a $3.02 trillion crypto market. The tape around them is calm rather than hot: Bitcoin trades at $84,078, Ethereum at $2,691, Solana at $122.34 (+4.7% in 24 hours) and XRP at $1.5685, with BTC dominance at 55.9% and $176.9 billion of 24-hour volume. Stablecoin supply is growing into a flat market, which is the quiet version of adoption.

The Three Things to Watch From Here

First, the Federal Register publication date — that is what actually starts the 60-day comment window, and the docket is where the operational-risk ladder, the redemption language and the reserve definitions can still change. Governor Barr has already named two things he wants addressed in the final rule: the standard that limits supervisory action on anti-money-laundering deficiencies and the clarity of universal redemption rights.

Second, whether the agencies can finalise early enough for the 120-day alternative start date to bite. On current timing it will not, which is exactly why January 18, 2027 is the date to plan around.

Third, what shows up in the first large issuer filings once the framework is live — and specifically whether tokenised versions of eligible funds end up used as reserve assets. If they do, the same tokenisation wave already reaching bank balance sheets reaches stablecoin reserves, with weekly reporting on top. That is a bigger structural change than any single price level.

Related reading on how the pieces fit together: the Treasury's parallel GENIUS Act proposal and the 2027 licensing timeline, Circle's Arc mainnet launch with 11 bank validators and USDC as gas, and the week a US bank settled a cross-border payment with its own stablecoin on Stellar.

For anyone holding dollars on-chain simply to move them, the practical upshot is a more defined instrument: full backing, a hard redemption window, weekly reporting and no promise of yield inside the wrapper. The rulebook is open for comment — the date on the door is January 18, 2027.