Stablecoin applicants must choose a supervisor while the OCC's rules are still proposals

Reserves equal to 100% of outstanding coins, held in the short-term dollar-denominated assets the statute names, leave zero of the balance to lend ^[1][1]. A deposit-funded bank earns a spread by lending short-dated money out for longer. A permitted payment stablecoin issuer earns whatever the specified assets yield. This is the cheap requirement to satisfy, because it is an instruction about what the balance sheet holds, and it sits alongside published redemption procedures and frequent regulatory reports ^[2].

The recurring cost sits one layer down. A report that triggers at a threshold does not trigger below it, so screening automated micropayments has to happen at each transaction ^[2]. The Sept. 1 Braumiller Law Group overview summarized by PYMNTS says compliance systems built around customers initiating discrete transactions may need to monitor thousands of machine-generated payments executed in rapid succession, and that applying those controls below traditional reporting thresholds, with no human in the loop, is the central challenge ^[12].

The plumbing underneath is ordinary web traffic. Coinbase's x402 protocol uses the existing 402 Payment Required status code so a person or a machine client can pay inside a normal internet request, with no conventional account or session structure ^[13]. An agent can ask for an API or a piece of proprietary information, receive a payment demand, transfer stablecoins and get the material almost instantly ^[17]. Institutions then need records establishing each transaction and identity, anti-money-laundering and sanctions checks that run at machine speed, including when payer and recipient sit in different jurisdictions ^[15].

Two ways this goes. If agent-initiated volume stays small, full reserving is the binding cost, since it caps what balances earn and the monitoring work stays a design exercise. If the volume scales, the reserve rule fades into treasury routine and per-transaction screening becomes the expense that grows with usage. In my view the second is more likely, because reserving is a one-time change to what an issuer owns and screening is a bill that arrives with every payment.

The charter question is priced into that. The OCC's proposals cover federally qualified issuers, certain state and foreign issuers and custody activities, followed by separate proposals on Bank Secrecy Act, anti-money-laundering and sanctions compliance ^[7]; the FDIC has addressed reserves, redemption, capital, custody, safekeeping, risk management and tokenized deposits ^[8]; the NCUA has proposed application procedures and risk standards for credit union issuers ^[9]. An applicant choosing between a state charter and federal supervision is choosing which of three unfinished rulebooks to build its reporting stack against ^[10][3].

What would break this reading is a final rule that carves out machine payments below a de minimis size, which would take the per-transaction screening cost back out of the model. The overview describes what its clients have to build; it does not count applications, staff or dollars ^[4].