The Bank Vault Opens: How the FDIC’s GENIUS Act Rules Are Unleashing Wall Street on a $323 Billion Stablecoin Market

For years, the largest banks in America watched the stablecoin market grow from a curiosity into critical financial infrastructure — and they were locked out. That changed this week. The Federal Deposit Insurance Corporation’s Board of Directors voted to approve a sweeping proposed rulemaking that puts the GENIUS Act into regulatory motion, handing Wall Street the clearest roadmap yet into a market now valued at $323 billion.

The vote is the most consequential regulatory development in digital finance since the GENIUS Act itself was signed into law. It does not complete the framework — a 60-day public comment period is now open, and full implementation alongside the companion CLARITY Act could run into early 2027. But it fires a starting gun that the biggest banks in the country have been waiting years to hear.

What the FDIC Actually Approved

The proposal establishes a prudential framework for FDIC-supervised institutions seeking to issue payment stablecoins, organizing the regulatory perimeter around four core activities: issuing payment stablecoins, redeeming them, managing the reserve assets that back them, and providing limited custodial services.

The reserve requirements are strict. Issuers must maintain assets that fully back outstanding stablecoins on at least a 1:1 basis, using only instruments permitted under the GENIUS Act. Those reserves must be disclosed monthly and subjected to independent audit. If the reserve ratio falls below 1:1, the issuer must notify the FDIC immediately and provide a corrective action plan.

Single-custodian concentration risk is capped: no more than 40% of total reserves may sit with any one institution. Redemption must generally be completed within two business days of a holder’s request. Capital requirements begin at a minimum of $5 million during the initial de novo period, scaling upward based on the risk profile of the issuer’s activities.

The FDIC also drew a firm line on insurance. Reserves backing payment stablecoins are not insured on a pass-through basis to holders — they receive corporate deposit treatment for the issuing institution itself. Stablecoins are not backed by the full faith and credit of the U.S. government, and issuers are explicitly prohibited from claiming otherwise. Equally, no issuer can pay interest or yield on stablecoins, directly or through affiliates or third parties.

On tokenized deposits — a closely related instrument where a traditional bank deposit is represented on a distributed ledger — the FDIC confirmed that the FDIC Act’s definition of a deposit is technology-neutral. A tokenized deposit is still a deposit. That single clarification matters enormously for banks like JPMorgan that have already built infrastructure around tokenized dollar instruments.

The Banks Waiting at the Gate

When the GENIUS Act passed last July, Bank of America’s chief executive made the bank’s position explicit: if issuing stablecoins becomes legally permissible, the bank will enter the business. By early this year, that same executive was quantifying the threat in reverse: if regulators eventually allow yield payments on stablecoins, somewhere in the range of $6 trillion in deposits — roughly a third of all commercial bank deposits in the United States — could migrate to digital dollar instruments.

That warning was designed to accelerate regulatory clarity, and to some degree it worked. JPMorgan has been the most operationally aggressive. Its Kinexys platform has been processing deposit token transactions for institutional clients since mid-2025. In early 2026, the bank placed dollar tokens on a public blockchain for the first time, marking a significant architectural shift from permissioned to public infrastructure. Kinexys operates technically as a deposit token rather than a GENIUS Act payment stablecoin, but the underlying settlement rails are already in place.

Bank of America, Citigroup, and Wells Fargo explored a collaborative stablecoin issuance project as early as the spring of 2025. Wells Fargo has also run a separate internal pilot using its own digital cash token for settlement. These were positioning moves — exploratory infrastructure built in anticipation of the regulatory gate opening. That gate is now ajar.

The Incumbents Are Not Surrendering

The arrival of bank-issued stablecoins does not displace the existing market leaders — it creates a new competitive tier above them, and forces a reckoning with scale. Tether holds roughly $184 billion in circulation. Circle’s USDC accounts for approximately $77 billion. Together they operate on infrastructure that processed more than $33 trillion in annual volume earlier this year, a figure that already exceeds the annual settlement volume of major card networks.

Both incumbents exceed the $10 billion circulation threshold established by the GENIUS Act, which means they face the same federal oversight regime — through the Office of the Comptroller of the Currency — as any bank entering the market. The FDIC and OCC coordinated closely on their respective rulebooks, and the two frameworks intentionally mirror each other in key respects.

The new entrants bring something the incumbents cannot easily replicate: existing customer trust, balance sheet depth, and direct access to the Federal Reserve’s payment systems. What they lack, at least for now, is the yield advantage. The GENIUS Act’s prohibition on interest payments is interpreted strictly by both the OCC and FDIC, closing off the obvious differentiation strategy that might otherwise draw users away from savings products.

The Yield Problem No One Has Solved

The most structurally awkward element of the new framework is the yield ban, and it was the subject of pointed debate in the weeks surrounding the FDIC vote. The logic is clear enough in the abstract: allowing stablecoins to pay interest would create a product that functionally competes with insured bank deposits while carrying none of the deposit insurance backstop. Regulators want stablecoins to be payment instruments, not shadow savings accounts.

The practical consequence is a curious inversion. Banks can offer savings accounts paying interest. The same banks issuing stablecoins cannot offer yield on those instruments. That creates an internal tension within the product suite of every major bank that enters the space — a dollar-denominated payment token that is demonstrably less attractive, as a store of value, than the account sitting next to it.

The debate over whether the yield ban will eventually be revisited is not settled. A Federal Reserve Board member recently debated the question publicly, arguing that an absolute prohibition risks pushing yield-seeking stablecoin innovation into jurisdictions with lighter regulatory touch. Research firm 21Shares forecasts the stablecoin market exceeding $1 trillion by year-end 2026, more than tripling its current size, with bank entry as a key driver. Galaxy Digital projects that stablecoin transaction volume will surpass ACH volume this year. Both projections assume the yield restriction holds.

Tokenization as the Bigger Prize

FDIC Chair Travis Hill’s remarks at this week’s board meeting extended well beyond payment stablecoins. Hill outlined a vision for tokenization — the representation of real-world assets on distributed ledgers — as infrastructure capable of delivering programmability, atomic settlement, and immutability that existing payment rails cannot match. The framing was deliberate: this rulemaking is not just about digital dollars for retail payments. It is about the plumbing of future financial markets.

The FDIC’s proposal includes 144 specific questions for public comment, a number that signals genuine regulatory uncertainty about implementation details rather than the performance of consultation. Questions touch on reserve asset composition, the treatment of cross-border stablecoin activity, interoperability between bank-issued and non-bank-issued instruments, and the precise technical standards for custodial segregation.

Treasury’s first notice of proposed rulemaking, which aims to align state-level payment stablecoin regulators with the federal framework, adds a third rulemaking layer to an already complex coordination problem. States regulate issuers below $10 billion in circulation; the OCC handles those above. The FDIC covers non-member state-chartered banks and state savings associations that issue through subsidiaries. Getting those three regimes to speak the same language in practice is the unfinished work.

What Changes Now — and What Does Not

The immediate market effect of this week’s vote is more psychological than operational. No bank will launch a GENIUS Act-compliant payment stablecoin before the comment period closes and final rules are published. The earliest realistic go-live dates for full compliance sit somewhere in late 2026 or early 2027.

What changes now is the credibility of the market signal. For the past several years, major banks expressed conditional interest in stablecoins — if the law passed, if regulators followed through, if the rules were workable. The law passed. The regulators are following through. The rules are workable enough to attract serious institutional capital. The conditioning is falling away.

The stablecoin market operated in a regulatory gray zone for most of its existence. Tether accumulated $184 billion in circulation without a federal charter, without FDIC oversight, and without reserve audit requirements that most banking regulators would recognize as adequate. That era has a defined end date now. Whether it ends with a controlled transition or a disruptive reordering of the market depends on how quickly banks can move from infrastructure to product — and whether the incumbent issuers can adapt fast enough to compete on the same legal terrain.

The $323 billion question is no longer whether banks will enter this market. It is whether the rules being written right now will allow them to do it in a way that makes the product worth offering — and worth holding.