The European Central Bank warns that widespread stablecoin adoption could reduce bank deposits, constrain lending, and complicate monetary policy in the euro area. A new working paper details a “deposit substitution effect” that could pressure bank funding. The authors caution that while current effects are modest, the potential impact grows with scale, especially given the overwhelming dollar-denomination of existing stablecoins.
A new European Central Bank working paper warns that large-scale stablecoin adoption could reduce bank deposits, constrain lending, and complicate monetary policy transmission. The study argues that as funds shift from traditional deposits to stablecoins, banks may face funding pressures.
The paper identifies a “deposit substitution effect,” where stablecoins compete directly with retail bank deposits. As detailed in the study, this could force banks to rely more on volatile wholesale funding. Using macroeconomic data, the authors find a higher share of non-bank digital money is associated with a smaller deposit base and reduced corporate lending.
This shift could change how monetary policy works in the euro area. If banks rely more on wholesale funding, policy rate increases may pass through to lending rates more rapidly.
Simultaneously, stablecoins could weaken the deposit channel of monetary policy. Competition from digital dollar-pegged tokens may limit banks’ ability to adjust deposit rates without risking further outflows.
The study highlights that roughly 99% of global stablecoin market capitalization is denominated in U.S. dollars. This dollar dominance means U.S. monetary policy shocks could indirectly affect euro liquidity conditions.
Such a scenario raises concerns about monetary sovereignty for the euro area. The paper frames stablecoins as a structural variable within the broader banking system, not merely a crypto-market innovation.
The conclusions depend heavily on adoption levels and usage patterns. The authors make clear that if stablecoins evolve into widely used payment or savings instruments, their interaction with bank balance sheets could become more consequential.
