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Know your (holding) limits: CBDC, financial stability and central bank reliance

Author

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  • Meller, Barbara
  • Soons, Oscar

Abstract

How do central bank digital currencies (CBDC) impact the balance sheets of banks and central banks? To tackle this question empirically, we built a constraint optimisation model that allows for individual banks to choose how to respond to outflows of deposits, based on cost considerations and subject to the availability of reserves and collateral, within the individual banks and system wide, and for a given level of liquidity risk tolerance. We simulate the impact of a fictitious digital euro introduction in the third quarter of 2021, using data from over 2,000 euro area banks. That impact depends on i) the number of deposits withdrawn and the speed at which this occurs, ii) the liquidity available within the banking system at the time of the digital euro introduction, iii) the liquidity risk preferences of the markets and supervisors, iv) the bank’s business model, and v) the functioning of the interbank market. We find that a €3,000 digital euro holding limit per person, as suggested by Bindseil (2020) and Bindseil and Panetta (2020), would have been successful in containing the impact on bank liquidity risks and funding structures and on the Eurosystem balance sheet, even in extremely pessimistic scenarios. JEL Classification: E52, E58, G21

Suggested Citation

  • Meller, Barbara & Soons, Oscar, 2023. "Know your (holding) limits: CBDC, financial stability and central bank reliance," Occasional Paper Series 326, European Central Bank.
    • Handle: RePEc:ecb:ecbops:2023326
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    File URL: https://www.ecb.europa.eu//pub/pdf/scpops/ecb.op326~d5c223d9b4.en.pdf
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    References listed on IDEAS

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    1. Keister, Todd & Monnet, Cyril, 2022. "Central bank digital currency: Stability and information," Journal of Economic Dynamics and Control, Elsevier, vol. 142(C).
    2. Stephen Williamson, 2022. "Central Bank Digital Currency: Welfare and Policy Implications," Journal of Political Economy, University of Chicago Press, vol. 130(11), pages 2829-2861.
    3. Ahnert, Toni & Assenmacher, Katrin & Hoffmann, Peter & Leonello, Agnese & Monnet, Cyril & Porcellacchia, Davide, 2022. "Cold hard (digital) cash: the economics of central bank digital currency," Research Bulletin, European Central Bank, vol. 100.
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    5. Mr. Marco Gross & Elisa Letizia, 2023. "To Demand or Not to Demand: On Quantifying the Future Appetite for CBDC," IMF Working Papers 2023/009, International Monetary Fund.
    6. Alissa Gorelova & Bena Lands & Maria teNyenhuis, 2022. "Resilience of bank liquidity ratios in the presence of a central bank digital currency," Staff Analytical Notes 2022-5, Bank of Canada.
    7. Castrén, Olli & Kavonius, Ilja Kristian & Rancan, Michela, 2022. "Digital currencies in financial networks," Journal of Financial Stability, Elsevier, vol. 60(C).
    8. Brunnermeier, Markus K. & Niepelt, Dirk, 2019. "On the equivalence of private and public money," Journal of Monetary Economics, Elsevier, vol. 106(C), pages 27-41.
    9. Lorenzo Burlon & Manuel A. Muñoz & Frank Smets, 2024. "The Optimal Quantity of CBDC in a Bank-Based Economy," American Economic Journal: Macroeconomics, American Economic Association, vol. 16(4), pages 172-217, October.
    10. Toni Ahner & Katrin Assenmacher & Peter Hoffmann & Agnese Leonello & Cyril Monnet & Davide Porcellacchia, 2024. "The Economics of Central Bank Digital Currency," International Journal of Central Banking, International Journal of Central Banking, vol. 20(4), pages 221-274, October.
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    Cited by:

    1. Bindseil, Ulrich & Marrazzo, Marco & Sauer, Stephan, 2024. "The impact of central bank digital currency on central bank profitability, risk-taking and capital," Occasional Paper Series 360, European Central Bank.
    2. Muñoz, Manuel A. & Soons, Oscar, 2023. "Public money as a store of value, heterogeneous beliefs, and banks: implications of CBDC," Working Paper Series 2801, European Central Bank.
    3. Muñoz, Manuel A. & Soons, Oscar, 2024. "Public money as a store of value, heterogeneous beliefs and banks: implications of CBDC," ESRB Working Paper Series 146, European Systemic Risk Board.
    4. Caccia, Enea & Tapking, Jens & Vlassopoulos, Thomas, 2024. "Central bank digital currency and monetary policy implementation," Occasional Paper Series 345, European Central Bank.
    5. Lambert, Claudia & Meller, Barbara & Pancaro, Cosimo & Pellicani, Antonella & Radulova, Petya & Soons, Oscar & van der Kraaij, Anton, 2024. "Digital euro safeguards – protecting financial stability and liquidity in the banking sector," Occasional Paper Series 346, European Central Bank.

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    More about this item

    Keywords

    digital currency; financial intermediation; financial stability; liquidity risk;
    All these keywords.

    JEL classification:

    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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