Designing Central Bank Digital Currencies

We study the optimal design of a central bank digital currency (CBDC) in an environment where agents sort into cash, CBDC and bank deposits according to their preferences over anonymity and security; and where network effects make the convenience of payment instruments dependent on the number of their users. CBDC can be designed with attributes similar to cash or deposits, and can be interest-bearing: a CBDC that closely competes with deposits depresses bank credit and output, while a cash-like CBDC may lead to the disappearance of cash. Then, the optimal CBDC design trades off bank intermediation against the social value of maintaining diverse payment instruments. When network effects matter, an interest-bearing CBDC alleviates the central bank's tradeoff.

We study the optimal design of a central bank digital currency (CBDC) in an environment where agents sort into cash, CBDC and bank deposits according to their preferences over anonymity and security; and where network effects make the convenience of payment instruments dependent on the number of their users. CBDC can be designed with attributes similar to cash or deposits, and can be interest-bearing: a CBDC that closely competes with deposits depresses bank credit and output, while a cash-like CBDC may lead to the disappearance of cash. Then, the optimal CBDC design trades off bank intermediation against the social value of maintaining diverse payment instruments. When network effects matter, an interest-bearing CBDC alleviates the central bank's tradeoff.

Digitalization is reshaping economic activity, shrinking the role of cash, and spurring new digital forms of money. Central banks have been pondering wheter and how to adapt. One possibility is central bank digital currency (CBDC)-- a widely accessible digital form of fiat money that could be legal tender. This discussion note proposes a conceptual framework to assess the case for CBDC adoption from the perspective of users and central banks. It discusses possible CBDC designs, and explores potential benefits and costs, with a focus on the impact on monetary policy, financial stability, and integrity. This note also surveys research and pilot studies on CBDC by central banks around the world.

Many central banks are currently exploring the possibility of issuing retail central bank digital currency (CBDC). While the primary objective varies between jurisdictions, many central banks consider improved cross-border payments as a potential benefit and previous work has shown that CBDC can help overcome some of the frictions in cross-border payments. CBDC is a safe and liquid asset reducing the number of financial intermediaries and the settlement risk. Designing CBDC systems for cross-border payments is not fundamentally different from tailoring other payment systems. However, the roles and responsibilities might be slightly different in a CBDC system, and the central bank may play a more pivotal role given CBDC’s nature as public money as opposed to commercial bank money. This note draws lessons from ongoing experimentation and research to identify design and policy considerations when developing retail CBDC systems so it may be compatible for cross-border payments. The note focuses on retail CBDC—a CBDC primarily targeting households and non-financial firms—and leaves wholesale CBDC considerations for future work, although many of the discussions are applicable to wholesale CBDC and other forms of money as well.

Central banks around the world are exploring and in some cases even piloting Central Bank Digital Currencies (CBDCs). CBDCs promise to realize a broad range of new capabilities, including direct government disbursements to citizens, frictionless consumer payment and money-transfer systems, and a range of new financial instruments and monetary policy levers.

This fintech note looks at how capital flow measures (CFMs) could be implemented with central bank digital currency (CBDC), and what benefits, risks and complexities could arise. There are several implications of the analysis. First, CBDC ecosystems should generally be designed such that they can accommodate the introduction of CFMs. Second, thanks to the programmability of the payment infrastructure given by the new digital technologies, certain CFMs could likely be implemented more efficiently and effectively with CBDC compared to the traditional system. Third, implementing CFMs requires central banks to collaborate on practices and standards. Finally, CFMs on CBDC need to operate alongside traditional CFMs.

This paper marks the launch of a new IMF series, Fintech Notes. Building on years of IMF staff work, it will explore pressing topics in the digital economy and be issued periodically. The series will carry work by IMF staff and will seek to provide insight into the intersection of technology and the global economy. The Rise of Digital Money analyses how technology companies are stepping up competition to large banks and credit card companies. Digital forms of money are increasingly in the wallets of consumers as well as in the minds of policymakers. Cash and bank deposits are battling with so-called e-money, electronically stored monetary value denominated in, and pegged to, a currency like the euro or the dollar. This paper identifies the benefits and risks and highlights regulatory issues that are likely to emerge with a broader adoption of stablecoins. The paper also highlights the risks associated with e-money: potential creation of new monopolies; threats to weaker currencies; concerns about consumer protection and financial stability; and the risk of fostering illegal activities, among others.

As central bank digital currency (CBDC) projects progress around the world, there is increased need for a project management methodology that is appropriate for CBDC. This paper develops a CBDC-specific project management methodology that establishes a common terminology and offers guidance to development teams on best practices for addressing the complex requirements and risks associated with CBDC. It is centered on an original five-step approach called the “5P Methodology”: preparation, proof-of-concept, prototypes, pilots, and production. The methodology emphasizes a phased approach to CBDC research and development, with strong focus on research preparation, experimentation and testing, risk management, stakeholder engagement, and cyber resilience.