The external financial spillovers of CBDCs
Banca d'Italia published a paper in July 2003 that uses a theoretical model to study how the introduction of a central bank digital currency (CBDC) by a systemic economy can affect the choices of residents in a small open economy. It finds that an increase in the preference for the foreign CBDC induces a banking crisis and has a negative impact on GDP, the greater the more the foreign CBDC is perceived as deposit-like. Public authorities can mitigate these effects with multiple tools: by taxing the CBDC, by easing macroprudential requirements, or through FX interventions. A higher stock of foreign CBDC held by households can shield the small economy from an increase in the interest rate on external debt, if the remuneration of the CBDC remains constant.