Why Banks Are Fighting for a Coin They Once Feared

This week, 21 of the world's biggest financial institutions — Bank of America, Citi, Goldman Sachs, Deutsche Bank, UBS, Wells Fargo, Fidelity, and more across five continents — said they would form a new company to issue a dollar-backed stablecoin, targeting a launch in the first half of 2027 and built to comply with the U.S. GENIUS Act and Europe's MiCA rules. The venture's name has not been announced and is still subject to closing conditions, and it descends from an October 2025 announcement in which an initial group of ten banks began exploring a 1:1 reserve-backed digital asset. To a reader who just saw the headline, this looks like banks finally embracing crypto. It's worth pausing on what they're actually fighting over, because the prize explains the strategy shift better than any press-release line about "trusted digital money."

The prize is the float.

A stablecoin is a token that trades at one dollar and is backed 1:1 by reserves an issuer holds, mostly in short-term U.S. Treasuries. Holders earn nothing. So the issuer takes in a dollar, buys a T-bill with it, collects the interest, and keeps the yield. That "float" — the interest on the reserves minus the roughly nothing paid to holders — is where 95% to 99% of stablecoin revenue comes from, and it scales both with interest rates and with how many dollars sit in circulation. It is a genuinely large business. Tether, the biggest issuer, reported about $13 billion in net profit for 2024, much of it this kind of income. The total stablecoin market is around $308 billion, and Tether together with USDC's Circle controls close to 90% of it.

Those two facts — the size of the float and how concentrated it is — explain the new coalition. For years, banks treated stablecoins as a competitor pulling deposits off their balance sheets, and the Wall Street Journal last week described the majors shifting from a defensive posture toward the asset to an offensive one. What changed is the rulebook. The GENIUS Act, signed into law in July 2025, gave issuers a federal framework for payment stablecoins — and, crucially for the economics, it bans stablecoin issuers from paying interest to holders. That single prohibition protects the float from competition: no challenger can win customers by paying them more, so the margin stays with whoever is allowed to issue. A consortium of giants is deciding it would rather capture that margin on a shared, compliant rails than watch it keep flowing to Tether or Circle, neither of which feels much like a bank.

Here is the part the headlines usually skip: this is a concession as much as a prize.

Issuing a stablecoin does not put money on your balance sheet to lend out. The dollars move off it, into a reserve pot that by design does not fund loans. The Federal Reserve's own analysis estimates that a dollar of deposit outflows can translate into roughly 60 cents to $1.26 of reduced bank lending, with the damage falling hardest on regional banks that lean on deposits to fund commercial real estate and relationship lending. The giants signing up for this consortium can afford to route a slice of their franchise onto new rails, because they have other businesses — for them, owning a piece of the float is a hedge against a flow they no longer believe they can stop. For smaller, non-participating banks, the same trend shows up as rising funding costs and a thinner deposit base.

It is also not the first experiment, nor an isolated one. European lenders moved first: ten EU banks organized around a euro stablecoin, and a separate euro project called Qivalis has grown to include 37 banks. Earlier in 2026, an "Open USD" consortium claimed more than 140 partners, from BNY and Stripe to Visa and Coinbase. The pattern — institution after institution choosing to become an issuer rather than be disintermediated — is what tells you the shift is structural and not a single press event.

So what does this actually change for an investor, being honest about it? Not next quarter's earnings. Standing up a company in the second half of 2026 and shipping a token in the first half of 2027 is years of buildout, and winning share against Tether's network effects — liquidity everywhere, near-zero switching costs — is anything but guaranteed. What it changes is the map. The largest banks have now publicly accepted that a meaningful share of stored value is moving onto blockchains, and that the yield on that stored value will be captured by whoever can issue most credibly. For a bank investor, that is one more reason to watch deposit trends and funding costs, and to be cautious of the regional end of the spectrum. For anyone trying to understand the sector, it is the moment the defensive posture ended: banks stopped fighting stablecoins and started fighting over the float.