The GENIUS Act rulebook is due July 18. Read who gets to issue.

The deadline this Saturday does not decide whether US stablecoins get regulated. It decides who is allowed to issue one. By July 18, 2026, one year after the GENIUS Act became law, six federal agencies have to finalize the rules that turn a stablecoin issuer into a licensed entity. The proposed OCC version sets a floor most companies cannot clear: $5 million in dedicated capital to issue under the federal framework, a legal ban on paying holders any yield, and reserve and redemption rules that only a balance-sheet business can run at scale.

Read together, the numbers are a moat. They fix the US stablecoin as a zero-yield payment rail that big banks and two crypto incumbents can issue profitably, and that almost no one else can. The rulebook arrives as the market contracts for the first time since the Terra collapse: the total stablecoin cap fell $7.7 billion in June, to about $312 billion, and slipped to roughly $300 billion by mid-July. The gate is closing while the room empties.

The rules are a set of thresholds

The GENIUS Act runs on numbers, and each number is a filter. Three of them do most of the sorting.

The $5 million floor

The OCC's proposed rule sets a $5 million minimum capital floor for a new federal payment stablecoin issuer during its first three years. After that window, capital has to be commensurate with the risk the issuer carries, which for a large book means far more than five million. Fall below the federal bar and you are pushed to a state charter instead, a slower and patchier path.

For a bank, five million is a rounding error. JPMorgan, Bank of America, and US Bancorp clear it without changing anything about how they are structured. For a payments startup that wanted to mint its own coin, five million in dedicated, ring-fenced equity is the price of admission before a single token exists.

The yield ban

The sharpest line is not in the OCC rule at all. It is in the statute. Section 4(a)(11) says no permitted payment stablecoin issuer, and no foreign one, may pay a holder any interest or yield, in cash, tokens, or anything else, in connection with holding the coin.

The economics of that clause are worth sitting with. An issuer holds reserves in Treasury bills and short-term paper, which at current rates earn roughly four to five percent. On a $300 billion market, that reserve income runs to well over ten billion dollars a year. The GENIUS Act routes all of it to whoever holds the charter and none of it to the person holding the coin. If you park a thousand dollars in a compliant US stablecoin, you are lending the issuer a thousand dollars at zero percent, and they earn the T-bill yield on your money. That is the whole business, and it is why banks want the license. It also reshapes what you can actually earn on a stablecoin: the coin itself pays nothing by law, so any yield has to come from lending it out somewhere riskier.

One gap keeps the debate alive. The Act bans the issuer from paying yield, but it did not define "holder" and stayed silent on whether an affiliate or a third party can run a rewards program on the side. Coinbase already pays USDC rewards through that side door. Whether the final rule slams it shut is one of the live questions in the comment file.

The redemption rule

The third threshold governs how fast holders can get out. Under the proposed rule, an issuer has to redeem within two business days of a request. If redemptions run past 10% of outstanding supply inside 24 hours, the window can stretch to seven calendar days. Reserves have to sit at least one-to-one against the coins, and any issuer with $25 billion or more outstanding must keep at least 0.5% of reserves, capped at $500 million, as fully insured bank deposits.

Those are prudential rules, and they are reasonable. They are also a second capital test in disguise. Holding half a billion in insured deposits and standing ready to redeem a tenth of your float in a day is not something a lightly funded startup can promise.

Who clears the bar

Stack the three thresholds and the field of eligible issuers gets short.

The banks walk in. A chartered bank already holds the capital, the reserve machinery, and the redemption plumbing. The GENIUS Act does not so much let banks into stablecoins as describe a product only a bank can comfortably issue: a narrow bank whose only job is to hold Treasuries against a token and keep the spread.

Two crypto incumbents make it. Circle and Coinbase-affiliated entities have the balance sheet and the legal teams to post the equity and charter up. Circle spent two years building toward exactly this outcome. It is the same split MiCA forced in Europe, where the compliant issuer won shelf space and the offshore one lost it.

The fintechs face a fork. A payments company that wanted to issue its own coin now has to raise five million in ring-fenced capital and charter a stablecoin bank, or drop the plan and distribute someone else's coin instead. For most, distributing Circle's USDC is the rational move, which hands the issuance economics, the reserve yield, back to the incumbent.

The offshore issuer gets squeezed. Tether's USDT is the largest coin in the world and was built entirely outside this framework. USDT already slid from $190 billion in May to about $184 billion as the rules took shape, while Circle's USDC fell from roughly $80 billion in March to around $73 billion. The US framework gives an offshore coin no easy onshore path, the same pressure Europe applied first.

Two issuers already hold more than 85% of the market. The rulebook does not break that concentration. It writes it into law.

The gate closes while the room empties

The timing is the part the regulatory coverage keeps missing. The June drop of $7.7 billion was the biggest monthly fall since May 2022, when Terra's collapse erased a quarter of the entire stablecoin market. This drop is milder, close to 3%, and Paul Howard of the trading firm Wincent called it a normal pullback in a long-term growth market. He is probably right about the trend.

But the direction still matters for who survives the rulebook. Supply is the leading sign of liquidity moving into or out of crypto, and it is moving out at the exact moment the cost of being a compliant issuer goes up. A shrinking market with a rising compliance bill is a consolidation machine. Marginal issuers do not raise five million to charter a bank so they can compete for a slice of a market that is contracting. They exit, or they never enter, and the float they would have held flows to the handful of players who already cleared the gate.

What holders actually get

Strip away the framing and the deal on offer to a US stablecoin holder is narrow. You get a token that is redeemable, reserved one-to-one, and issued by a regulated entity. You do not get yield, by law. And if the issuer fails, the GENIUS Act's own priority scheme decides your place in line, which is not as near the front as the marketing implies. We took that apart separately: where holders rank if an issuer fails.

That is a fair trade for a payment rail. It is a poor trade if you thought a stablecoin was a savings product. The rulebook makes the distinction legal and permanent: the coin moves money, the issuer keeps the interest, and the two never mix.

What to watch now

Three things decide how this lands.

First, whether the agencies actually hit July 18 or let the deadline slip. Once final rules publish, issuers get about 120 days to comply, and the framework takes effect on the earlier of that runway or January 18, 2027. A slip pushes the whole clock.

Second, whether the final rule closes the affiliate yield loophole or leaves it open. If third-party rewards survive, the yield ban is porous and the consumer pitch comes back through the side door. If they are shut, the zero-yield coin is locked in.

Third, whether the state charter path stays viable as a real alternative. New York already runs a one-year transition for existing issuers like Paxos and Gemini. If states offer a lighter route, some issuance leaks around the federal gate. If they fall in line with the OCC, the gate is the only door.

The headline on Saturday will say the US finished regulating stablecoins. Read it as the day the country decided who is allowed to print them.

Sources

• Sullivan & Cromwell, OCC Proposes Regulations to Implement GENIUS Act (March 2026)
• CoinDesk, Stablecoin market cap has shrunk by $10 billion since May (July 12, 2026)
• Stablecoin Insider, Six Federal Agencies Have 35 Days to Finalize GENIUS Act Rules by July 18
• Congressional Research Service, The Stablecoin Yield Debate (Section 4(a)(11))
• Perkins Coie, Stablecoin Interest, Yield, and Rewards: OCC Proposes Sweeping Regulations
• Columbia Law CLS Blue Sky Blog, Circle, Coinbase, and the Prohibition on Interest Under the GENIUS Act

This is not financial advice.