Banks have stayed out of stablecoins for two reasons: regulatory clarity was missing, and customers moving deposits into stablecoins cannibalize the loan book. The GENIUS Act provided the clarity. Our new whitepaper shows how banks can use wholesale deposits, which never funded the loan book, to back an off-hours stablecoin sleeve and own the weekend settlement market before non-bank issuers become the default. Read the whitepaper.
Fedwire closes on Friday and does not reopen until late Sunday. CLS and TARGET2 are closed on weekends. For decades, those closed windows were tolerable because nothing much happened on weekends. That has changed. Over a single weekend in April 2026, trade.xyz, a perpetual derivatives venue, processed $1.5 billion in institutional notional across crude oil, the Nasdaq 100, and the S&P 500. All of it settled in stablecoins.
Hedge funds, commodity traders, asset managers, and corporate treasurers with weekend exposure are already routing around closed bank rails. Each weekend, more institutional workflows default to non-bank infrastructure.
Banks have a way to claim this flow without harming the deposit franchise. A bank-issued stablecoin sleeve, backed by wholesale deposits rather than core retail balances, turns idle weekend liquidity into a 48-hour transactional inventory. It reverts to deposit form on Monday morning, leaving the franchise intact while opening a revenue line during hours the franchise cannot reach.
What the sleeve looks like
Under the GENIUS Act, reserves backing a payment stablecoin must be segregated into high-quality liquid assets. Every dollar a client converts from a deposit becomes a dollar the bank can no longer lend. That logic applies to core retail deposits. It does not apply to wholesale deposits, which never funded the loan book and already attract a 40% LCR outflow rate or higher. The opportunity cost of using wholesale balances to back a stablecoin is far smaller than the headline number suggests, because the HQLA was already there.
A bank-issued stablecoin “sleeve” allows banks to offer their corporate and institutional customers settlement during off-hours. The sleeve is a tightly sized, prefunded, KYC’d pool of stablecoin liquidity that is reversible to deposit form on Monday morning.
- At 4:30 PM New York on Friday, an institutional client converts $100 million in wholesale balances into a regulated stablecoin under the bank’s rulebook.
- That stablecoin moves through whitelisted venues and custodians to post margin, substitute collateral, or settle weekend exposure.
- On Monday morning, any unused balance reverts to the original deposit account through automatic sweep.
The $100 million was a deposit on Friday and a deposit on Monday. For the 48 hours in between, it was a regulated stablecoin inside a defined rulebook.
For a $500 billion wholesale bank running a $5 billion peak sleeve only on weekends, total annual cost runs around $38 million against $260 billion in annualized flow. Break-even sits at 1.4 to 1.6 bps. At the same time:
- Tri-party collateral movement charges 1 to 3 bps today.
- Weekend FX conversion runs 5 to 20 bps.
- Prime brokerage off-hours financing clears 5 to 15 bps over base.
At the right size, the math clears a standalone P&L with meaningful revenue above the cost. The sleeve is not a replacement for the deposit franchise. It is a revenue line that runs alongside it, during hours the franchise cannot reach.
The sleeve is a decade-long product
Fedwire is extending to 22 hours a day, six days a week, but no earlier than 2028. Saturdays remain out of scope. CLS and TARGET2 weekend closure stays. A permanent gap from Friday evening to Sunday evening is a feature of the dollar settlement day for the foreseeable future.
The deeper fix, central bank money with cross-network tokenized deposit interoperability, is plausibly ten to fifteen years out. The solution has to reconcile multiple central bank legal frameworks at once, which is what 24/7 cross-perimeter public money settlement requires. The binding constraint is governance, not technology.
That gives banks a window measured in years, not months. The catch is that every weekend, flow routed through a non-bank stablecoin normalizes non-bank money for institutional use. Five years from now, the default reference for cross-perimeter weekend flows will be whatever banks did or did not deploy in the next eighteen months.
Issuing a sleeve does not threaten the deposit franchise. Letting clients build weekend workflows on a non-bank stablecoin does.
Our whitepaper, “Off-Hours Cash: The Settlement Gap Banks Can Own By Adopting Stablecoins”, works through the design parameters of the stablecoin sleeve, the regulatory treatment, and the unit economics. Read it here.
