Wholesale CBDC: Sovereignty and Interbank Efficiency
Interbank payment infrastructures are undergoing a discreet but profound transformation. Nine out of ten central banks worldwide have launched studies on Central Bank Digital Currencies (CBDCs), according to the Bank for International Settlements. While retail CBDCs, intended for the general public, often capture media attention, it is their wholesale version – reserved for financial institutions – that could deeply reshape settlement circuits and the monetary sovereignty of states.
Why are central banks investing in this technology? What operational gains can they expect? And above all, what risks threaten the balance between financial innovation and banking stability?
The Promise of Modernized Interbank Infrastructure
Current interbank payment systems, though reliable, rely on architectures developed decades ago. The Banque de France notes that the massive computerization of the 1960s-1980s constituted the last major technological leap in this area. Since then, permissioned Distributed Ledger Technologies (DLT) offer new opportunities.
A wholesale CBDC allows financial institutions to settle their transactions directly in central bank money on a shared ledger. The expected benefits are numerous: drastic reduction in operational costs associated with clearing systems, acceleration of settlement times from several hours to a few minutes, and above all, increased transparency of financial flows, which facilitates prudential supervision.
Unlike current systems where banks must maintain significant reserves to cover their intraday positions, a wholesale CBDC could optimize liquidity management. Instant settlement mechanically reduces default risks and collateral requirements, thereby freeing up capital for other productive uses.
Monetary Sovereignty: Reclaiming Control from Private Solutions
The emergence of private stablecoins and cryptocurrencies has sounded the alarm among central banks. By giving financial institutions a means to directly settle their claims in digital central bank money, monetary authorities strengthen their position against private actors seeking to offer their own settlement solutions.
The École de Guerre Économique emphasizes that cryptocurrencies now represent a convergence point between technological emancipation and economic sovereignty issues. Faced with this reality, central banks cannot remain spectators. Wholesale CBDC is part of a defensive strategy: avoiding dependence on private systems that are potentially vulnerable or difficult to regulate.
This sovereignty is also expressed in the management of monetary policy. A centralized digital infrastructure offers central banks real-time visibility into financial flows and opens the way for innovative mechanisms: sectoral targeting of credit, implementation of differentiated interest rates, or even experimentation with concepts like “helicopter money” in the event of a systemic crisis.
Technical Challenges: Architecture and Scalability
The choice of technical architecture determines the success of the project. Authorized DLTs offer undeniable advantages in terms of traceability and resilience, but their scalability remains a major challenge. Interbank settlement systems process a considerable volume of high-value transactions daily. Any infrastructure must guarantee fast, secure, and large-scale processing.
The conversion of existing bank reserves to the digital ledger also raises questions. How can this transition be organized without disrupting system liquidity? Will banks have to maintain two parallel circuits during a transitional period? These operational questions require rigorous experimentation before any large-scale deployment.
Denis Beau, First Deputy Governor of the Banque de France, recalled in 2021 that the deployment of a digital currency raises complex problems that cannot be solved to the detriment of commercial banks. The balance between innovation and financial system stability remains an absolute priority.
The Risk of Banking Disintermediation
Paradoxically, one of the main obstacles to the adoption of wholesale CBDCs lies in their potential impact on the business model of commercial banks. If institutions can directly access digital central bank money, what place remains for traditional bank deposits?
A massive migration of deposits to CBDC would mechanically weaken banks' ability to finance the real economy. The financing of the economy largely relies on the transformation of short-term deposits into long-term loans. Any disruption to this balance would weaken bank balance sheets and could lead to a credit crunch.
Wholesale CBDC designers must therefore incorporate safeguards: limitation of amounts held, absence of attractive remuneration, or access reserved for certain categories of transactions. The objective is not to compete with bank money, but to complement the existing ecosystem with a more efficient settlement tool.
International Coordination and Interoperability
Financial flows know no borders. A wholesale CBDC can only fully realize its potential by articulating with the systems of other jurisdictions. Cross-border interoperability is therefore a strategic issue of paramount importance.
Several central banks are already collaborating on international pilot projects. These experiments aim to test common protocols, harmonize technical standards, and establish the legal frameworks necessary for settling cross-border transactions in CBDC.
However, international coordination raises delicate governance questions. Who defines the rules? How can data confidentiality be guaranteed while meeting compliance requirements? How can a dominant CBDC avoid imposing its standards on others? These questions refer to current geopolitical tensions, particularly among major monetary powers. To better understand these dynamics, one can refer to the ECB's analysis of geopolitical tensions.
Confidentiality, Compliance, and Governance
The traceability offered by DLTs can be a double-edged sword. While it facilitates the fight against money laundering and terrorist financing, it also raises legitimate concerns about the confidentiality of financial transactions.
Financial institutions demand a high level of discretion regarding their strategic operations. A poorly designed architecture could expose sensitive information to undesirable actors, or even competitors. Central banks must therefore design differentiated confidentiality mechanisms: total vis-à-vis third parties, but transparent for regulatory supervision.
The governance of the system also raises questions. Who controls network access? Under what criteria can an institution be excluded? How are protocol updates carried out? These highly political decisions will determine the system's acceptability by all stakeholders.
“The stability of our payment system does not solely depend on our ability to make our central bank money available in digital form.” – Denis Beau, Banque de France
Towards Progressive and Prudent Implementation
Central banks are adopting a resolutely pragmatic approach. Rather than immediate large-scale deployment, they favor targeted experiments, pilot projects limited in time and scope, and in-depth consultations with the financial industry.
This prudence is explained by a keen awareness of systemic risks. A major technical failure on an interbank settlement infrastructure would have catastrophic repercussions on the entire economy. It is therefore better to proceed in stages, rigorously testing each component before generalizing.
The approach is also intended to be inclusive. Commercial banks, far from being marginalized, are involved from the design stage in discussions on architecture and use cases. This collaboration ensures that wholesale CBDC genuinely meets market needs while preserving financial stability. Similar challenges are found in other transforming sectors, such as the pharmaceutical industry facing the patent cliff.
Perspectives: A Hybrid Financial System
The future will probably not be binary – CBDC or traditional systems – but hybrid. Historical infrastructures will continue to coexist with new digital solutions, each serving specific needs. Very high-value transactions might favor wholesale CBDC for its speed and security, while routine operations would remain on existing rails.
This coexistence will require robust technical gateways and common standards. Central banks will also need to maintain a permanent capacity for adaptation: technological innovation never stops, and the solutions of 2026 may no longer be optimal in 2030.
Here is a summary of the advantages and challenges of wholesale CBDCs:
| Category | Advantages | Challenges |
|---|---|---|
| Operational | Reduced costs, fast settlement, transparency | Scalability, interoperability, liquidity transition |
| Monetary | Increased sovereignty, monetary policy tools | Banking disintermediation, impact on financing |
| Governance | Fight against AML/CTF | Confidentiality, network control, international rules |
Wholesale CBDC represents a historic opportunity to modernize the core of the financial system while strengthening the monetary sovereignty of states. But this ambition can only be realized by overcoming the technical, operational, and political challenges along the way. The coming years will be decisive in determining whether this promise will materialize or join the long list of financial innovations that remained at the prototype stage.
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