Functional Consistency across Retail Central Bank Digital Currency and Commercial Bank Money

• URL: http://arxiv.org/abs/2308.08362v2
• Date: Mon, 13 Jan 2025 11:03:30 GMT
• Title: Functional Consistency across Retail Central Bank Digital Currency and Commercial Bank Money
• Authors: Lee Braine, Shreepad Shukla, Piyush Agrawal,
• Abstract summary: Adoption of a retail CBDC can risk fragmenting both payments markets and retail deposits. We identify the common operational characteristics that are required to achieve functional consistency across all forms of regulated retail digital money. We conclude that no single design option could provide functional consistency across digital pounds and commercial bank money.
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• Abstract: Central banks are actively exploring central bank digital currencies (CBDCs) by conducting research, proofs of concept and pilots. However, adoption of a retail CBDC can risk fragmenting both payments markets and retail deposits if the retail CBDC and commercial bank money do not have common operational characteristics. In this paper we focus on a potential UK retail CBDC - the "digital pound" - and the Bank of England's "platform model". We first explore how the concept of functional consistency could mitigate the risk of fragmentation. We next identify the common operational characteristics that are required to achieve functional consistency across all forms of regulated retail digital money. We identify four design options based on the provision of these common operational characteristics by the central bank, payment interface providers, technical service providers or a financial market infrastructure. We next identify architecturally significant use cases and select key capabilities that support these use cases and the common operational characteristics. We evaluate the suitability of the design options to provide these key capabilities and draw insights. We conclude that no single design option could provide functional consistency across digital pounds and commercial bank money and, instead, a complete solution would need to combine the suitable design option(s) for each key capability.

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