The ECB published a study today warning that stablecoins could erode retail deposits across the eurozone and undermine the effectiveness of monetary policy. The finding is notable — not because it’s new, but because it’s taken this long for the institution to officially say it.

As I related last May, Italy’s Finance Minister Giancarlo Giorgetti made exactly this argument, warning that the displacement of traditional bank deposits by dollar-denominated stablecoins represented a direct threat to European monetary sovereignty. His remarks were largely dismissed at the time as political protectionism. The ECB’s study vindicates the concern. The mechanism is straightforward: if depositors move funds from bank accounts into stablecoins, banks lose the deposit base that anchors their lending capacity — and the ECB loses its primary transmission channel for monetary policy. Rate changes simply don’t land the same way when the money isn’t sitting in a regulated deposit account.