Ferguson and Rincon-Cruz argued in Bloomberg this week that stablecoins and bank deposits are complements, not substitutes. Historical correlation supports them: deposits and stablecoin inflows moved together since 2018 with a 0.87 coefficient. The problem is that stablecoin supply is still a crumb relative to total deposits. At $284 billion against $18+ trillion in bank deposits, we haven't hit the threshold where the relationship actually gets tested. The correlation argument is backwards looking and tells us nothing about what happens when stablecoins scale to the $2-3 trillion projections Treasury is now forecasting.
The structural concern worth taking seriously is that narrow-banked stablecoins, by definition, don't do fractional reserve lending. If deposits migrate to 1:1 T-bill backed instruments, that capital isn't funding mortgages or business loans. Banks do maturity transformation that stablecoin issuers cannot. This is the legitimate version of the argument. The less legitimate version conflates two separate things: credit availability and the spread banks have captured for decades. Average savings accounts pay ~0.45%. Three-month Treasuries yield ~3.9%. Banks have pocketed that ~3.5% arbitrage on trillions in deposits, and stablecoin rewards expose it to retail depositors for the first time. The $6.6 trillion "at risk" framing from TBAC assumes depositors will chase yield. But if 70-80% of bank deposits are rate-insensitive (per UCLA research the Bloomberg piece cites), the threat to credit creation is smaller than the threat to incumbent margins.
The real bind is this: stablecoins that give all yield back to the end user are functionally narrow banks. They offer the less interesting version of programmable money. A JPM-USD stablecoin that operates under the same reserve constraints as USDC is just an IOU with bells and whistles around recourse and insurance. The more interesting use case is fast, cheap, composable money that can plug into DeFi rails and structured products. But that version competes directly with deposits. Stables are stuck in a doublebind where narrow banking makes them a dumbed-down version of internet money while maintaining a sliver of attraction as deposit alternatives, and anything more useful ends up in a direct fight with the banks' funding base.
The legitimate concern: deposit migration constrains credit extension
The self-interested framing: protecting the spread banks have captured for decades
The policy question Congress is actually answering: who gets to offer depositors a competitive rate
The CLARITY markup happens today. The banks want the "affiliate loophole" closed. Coinbase wants to keep offering 4%+ rewards. The market structure framework everyone agrees on is now hostage to a distribution fight over yield.
Last Updated:
January 29, 2026