The GENIUS Act: the 18 July deadline, between settled rules and a bet on the debt

18 July 2026 marks the first anniversary of the GENIUS Act, the US stablecoin law, and above all the legal deadline for its implementing rules. Six federal agencies are right now finalising the framework that will govern a private money of more than $230 billion. Around this date, two orders of reality must be distinguished: what the law sets in stone, which is a fact, and what the market expects from it, which remains a bet. Confusing the two would be the best way to misread the event.

A framework reminder is in order. A payment stablecoin is a digital token meant to be worth a dollar, backed by reserves and redeemable at par. We described how this market and the law work in our guides on stablecoins and the GENIUS Act and on its enforcement architecture. This article does not redo that pedagogy: it focuses on what the 18 July deadline changes, and on the share of narrative that surrounds it.

The timeline and the settled rules

Let us start with the facts. The GENIUS Act was enacted on 18 July 2025. The law required its implementing rules to be published no later than a year after, that is, 18 July 2026. Six agencies are concerned: the OCC, the FDIC, the NCUA, the Treasury, FinCEN and OFAC. Each published a proposed rule between March and April 2026, and all the public consultations closed on 9 June, placing publication of the final texts in the June-July window.

The content of these rules is already written into the law. A payment-stablecoin issuer must hold 100% reserves, backed by cash, insured bank deposits and short-maturity Treasury bills, of 93 days or less. It must publish the composition of its reserves every month. It is forbidden to pay interest to holders. Above $10 billion of outstanding, it mandatorily moves under federal supervision; below it, it can opt for a state regime deemed equivalent. Finally, foreign issuers are excluded from the US market, except by a reciprocity agreement negotiated by the Treasury.

This base is solid and, for the most part, uncontested. The battle of comments focused mainly on implementation details, notably OFAC’s reach over foreign issuers. But the structure will not move anymore. It is from this base that the uncertain part begins.

The Treasury-bill channel

From the reserve rule follows a mechanical fact: a compliant stablecoin issuer is a near-automatic buyer of short Treasury bills. For each token issued, it must place a dollar in cash or government debt of less than 93 days. The stablecoin thus becomes a cousin of the money market fund, with the same reserve mechanics, but without the right to pass the yield to its holders. This point is settled, and it is not trivial: it directly links private digital money to the financing of the state.

Where we leave the fact for the bet is on the scale. The stablecoin market today weighs about $230 billion. The projections, for their part, soar. Treasury Secretary Scott Bessent estimated the US market could exceed $2 trillion by the end of 2028, and Standard Chartered puts at about $1 trillion the new Treasury-bill demand that would result. The same bank calculates that, added to the other needs, this demand could exceed the expected net bill supply, forcing the Treasury to issue more short-term debt.

These figures must be held for what they are: scenarios, issued by analysts and officials who have an interest in a flourishing market. The mechanism is real, the order of magnitude is not yet. A compliant issuer does buy Treasury bills; that they collectively be a trillion depends on an adoption trajectory that is nothing written. The link between stablecoins and debt auctions is a credible hypothesis, not an observed fact.

The ban on paying yield, and its side effects

One provision deserves particular attention, because it will shape the market more than the others: the ban on issuers paying a yield to holders. The intent is clear, to prevent stablecoins from becoming disguised savings accounts, escaping bank regulation and able to siphon banks’ deposits. But the side effect is predictable.

If a stablecoin pays nothing while its reserves, for their part, produce interest pocketed by the issuer, two dynamics kick in. On one side, compliant issuers see their business model confirmed: they keep the reserve yield, very lucrative at this scale. On the other, holders seek yield elsewhere, which pushes toward tokenised money market funds and other interest-bearing vehicles, in direct competition with payment stablecoins. The rule does not remove the appetite for yield, it displaces it. It also creates a geographic asymmetry: per several analyses, the same issuer can offer yield on its tokens issued outside the United States, but not on those regulated in the United States, a border that invites circumvention.

The Tether case, the framework’s blind spot

No honest reading can ignore the elephant in the room. Tether, the issuer of USDT, represented about two-thirds of the global stablecoin supply in mid-2026. Yet Tether is domiciled outside the United States, and the question of whether OFAC can really constrain a foreign issuer serving Americans is precisely one of the points the consultation was to settle. The reciprocity determination that would open the US market to the group has not been issued to date.

Two readings clash. In the first, 18 July puts Tether against the wall: without compliance, access to the US market closes, and the group has moreover launched a dedicated token, USAT, designed for the US rules. In the second, more sceptical, the bulk of Tether’s activity will simply stay offshore, beyond the US regulator’s reach, and a non-compliant dollar-stablecoin market will keep thriving internationally. US regulation would then frame the domestic stablecoin without reducing the global dollar stablecoin. Which one wins remains open, and it is the framework’s heaviest uncertainty.

The possible trajectories

Several continuations emerge. These are scenarios, not forecasts.

The first scenario is the clear framework and the wave of demand: the rules are finalised in time, compliant issuers like Circle thrive, and Treasury-bill demand begins to materialise, validating the narrative of state financing by digital money. The second is the timeline that slips: the agencies publish interim or incomplete rules, and implementation spreads out, because regulatory sprints rarely keep all their promises on time. The third is circumvention by Tether, already mentioned. The fourth, the least commented and the most serious, is the run.

The risk we watch least: the run

Here is the counter-thesis, the one that tempers both enthusiasm and alarmism. The dominant narrative presents the GENIUS Act either as a revolution in state financing, or as a systemic bomb in gestation. Both probably overestimate the event, and neglect the real weak point.

On the optimistic side, some perspective is needed. A $230 billion market stays modest against the $28 trillion of US marketable debt and the $8 trillion of money market funds. The stablecoin as a great creditor of the state is a projection to 2028, not a 2026 reality, and the history of adoption forecasts invites caution. The framework, on the other hand, brings a real and underestimated progress: by requiring reserves in short Treasury bills and monthly transparency, it cleans up a long-opaque market, where Tether once held commercial paper and ended up settling with the New York justice over its reserves. From this viewpoint, the law reduces a risk rather than creating one.

On the danger side, the error would be to look for the threat in the wrong place. The risk is not that stablecoins buy too many Treasury bills, it is that they cannot sell them fast enough on the day of a run. A stablecoin is a money market fund without the money market fund’s protections: neither the liquidity cushions of rule 2a-7, nor above all a central-bank net. Yet the structure invites flight, as for a fund or a bank: at the first doubt, better to exit at par before the others. The precedent exists. In March 2023, Circle’s USDC depegged to about $0.87 when the market learned that part of its reserves was frozen at the failing Silicon Valley Bank. The token only regained its peg after the federal rescue of the bank. Safe reserves do not prevent a depeg if redemptions go faster than liquidity, and the GENIUS Act, as it stands, provides no lender of last resort for issuers. We detailed this run mechanic in our money market funds guide; it holds, worse, for stablecoins.

The fact and the bet

The 18 July deadline is a real milestone, and it must be read without excess in either direction. The fact is a framework finally written: full reserves in short, safe assets, transparency, ban on paying yield, a regulatory border. It is a clear improvement on the era of opacity, and that deserves to be said. The bet is the narratives grafted onto it: the trillion-dollar wave of debt demand, Tether’s submission, the monetary revolution. They are possible, not settled, and the honest analyst flags them as hypotheses. As for the risk, it is not in the excess safety of the reserves, but in the absence of a net the day confidence wavers. The right reading of 18 July holds in one sentence: the rule is settled, the bet begins, and the question we ask least, that of the run, is the one that matters most.

Sources

1. Congress.gov, text of the GENIUS Act (S.1582, 119th Congress), enacted 18 July 2025: https://www.congress.gov/bill/119th-congress/senate-bill/1582/text
2. Stablecoin Insider, six federal agencies at the 18 July 2026 deadline, consultations closed 9 June: https://stablecoininsider.org/six-federal-agencies-have-35-days-to-finalize-genius-act-stablecoin-rules-by-july-18/
3. OCC, proposed implementing rule (12 CFR Part 15), March 2026: https://www.occ.gov/news-issuances/bulletins/2026/bulletin-2026-3.html
4. U.S. Department of the Treasury, proposed GENIUS Act anti-money-laundering rule: https://home.treasury.gov/news/press-releases/sb0435
5. Brookings, “Next steps for GENIUS payment stablecoins”: https://www.brookings.edu/articles/next-steps-for-genius-payment-stablecoins/
6. The Block, Standard Chartered projection of about $1 trillion of stablecoin-linked Treasury-bill demand: https://www.theblock.co/post/390783/stablecoins-could-drive-1-trillion-in-t-bill-demand-giving-treasury-room-to-shift-issuance-standard-chartered
7. The Block, Scott Bessent estimates the US stablecoin market could exceed $2 trillion by the end of 2028: https://www.theblock.co/post/357872/us-stablecoin-market-could-exceed-2-trillion-projection-by-end-of-2028-thinks-treasury-secretary-bessent
8. l0g, guides Stablecoins and the GENIUS Act and Who enforces the GENIUS Act.
9. l0g, Reading money market funds.