A new simulation from the European Central Bank shows that the digital euro could trigger a deposit outflow of up to €700B during a run on commercial banks
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Context & Ripple Effects
The project has moved through an ECB investigation phase and a later two-year preparation phase focused on rules, partners and testing. This simulation adds a bank-funding stress scenario to that implementation work.
Debate had already centered on the ECB's power to set wallet limits, with major member states raising concerns in digital-euro negotiations over wallet controls. The new result makes those limits a financial-stability question as well as a governance one.
First-order effects
- The ECB and digital-euro policymakers must weigh a modeled €700 billion deposit shift in a bank-run scenario when setting wallet caps and other conversion constraints.
- Commercial banks face a clearer risk that deposits could move into central-bank money precisely when their funding is under pressure; the finding is a stress-test result, not evidence of an actual outflow.
Second-order effects
- Negotiations over holding limits, access rules and crisis safeguards are likely to become more contentious, as tighter protections can reduce the product's usefulness while looser ones raise bank-disintermediation concerns.
- Banks and supervisors will have stronger incentives to model digital-euro conversion behavior alongside liquidity and run-risk planning, rather than treating the project solely as a payments initiative.
Third-order effects
- If similar results persist, retail CBDC design will increasingly be judged by whether it can add a public digital-payment option without weakening commercial banks' role in deposit-taking and credit intermediation.
- The policy trade-off may favor constrained or tiered access models over an unrestricted digital-cash substitute, though the eventual balance remains a political and design decision.
The trend: Retail CBDCs are evolving from a payments-and-privacy project into a test of how central-bank digital money can coexist with commercial-bank funding stability.