A central bank digital currency is best understood not as a single policy but as a trade-off. The same instrument that could let depositors flee commercial banks at the speed of a keystroke could also give policymakers the real-time data they need to stop that flight before it becomes systemic. That tension — disintermediation risk on one side, an information dividend on the other — is the core of the debate over how CBDCs would reshape financial markets.
Introduction to Central Bank Digital Currencies and Financial Stability
A CBDC is a digital liability of a central bank, available to households or financial institutions alongside the existing stock of physical banknotes and commercial bank reserves. Because it would be a claim on the central bank rather than on a commercial bank, it sits one step closer to risk-free money than a bank deposit does. That structural difference is what makes the financial stability question so sharp.
The Atlantic Council's CBDC tracker frames the concern plainly: citizens could pull too much money out of banks at once by purchasing CBDCs, triggering a run that affects banks' ability to lend and sends a shock to interest rates. It notes this is especially a problem for countries with unstable financial systems, and that CBDCs also carry operational risks, including vulnerability to cyber attacks, and require a complex regulatory framework covering privacy, consumer protection and anti-money laundering standards.
The Dual Impact on Commercial Banking Stability: Disintermediation vs. Information
The first channel is the bank run risk. In periods of financial stress, depositors and other creditors may withdraw funding either to meet their own liquidity needs or as part of a run driven by solvency concerns. A CBDC gives that flight a perfectly safe destination, potentially accelerating the exodus.
The second channel runs in the opposite direction. Analysts at the US Office of Financial Research argue that monitoring flows into CBDC would allow policymakers to infer more quickly when a run is underway and to place troubled banks into resolution sooner. Crucially, depositors anticipate this faster policy reaction, which decreases their incentive to join the run in the first place. The OFR calls this the "information effect" — a channel through which a CBDC may improve financial stability rather than weaken it.
The two channels pull against each other even within a single design. The OFR notes that a CBDC used less in normal times would have a smaller impact on banks' maturity mismatch, but would provide more precise signals during stress. Policymakers must balance these competing concerns so that the currency enhances rather than weakens stability.
CBDCs and Central Bank Operations: Balance Sheet and Risk Implications
A CBDC also changes the central bank's own position, not just the commercial banks'. An ECB occasional paper on central bank financial risk-taking explains that because a CBDC is a new item on central bank balance sheets, it can affect their financial risks in multiple ways — though none of these risks are entirely new. Banknotes and commercial bank reserves held with a central bank carry no market, credit or liquidity risk and are generally considered risk-free assets in the domestic currency.
The catch is that issuing such liabilities must be matched by central bank assets, which is what allows the implementation of monetary policy. A large CBDC uptake would therefore swell the balance sheet and the asset side that funds it, with consequences for profitability, risk-taking and capital that depend on design choices and market reactions. The ECB paper treats this as a genuinely open question rather than a settled cost.
Cross-Border Transactions: Efficiency Gains and New Volatility Risks
Cross-border payments are where CBDC experimentation is most advanced. Project mBridge, a collaboration documented by the Bank for International Settlements and participating central banks, custom-designed a new native blockchain — the mBridge ledger — developed by central banks for central banks, to serve as a specialised and flexible platform for multi-currency cross-border payments. The project report emphasizes modular functionality, scalability, and compliance with jurisdiction-specific policy, legal and governance requirements.
In October 2022, the BIS and four central banks completed a successful pilot of real-value cross-border CBDC transactions by commercial banks on the mBridge platform. The participating institutions caution that BIS Innovation Hub projects are experimental in nature, investigating technological and practical feasibility rather than delivering a finished system.
The European Central Bank flags the other side of the cross-border ledger. In an April 2022 speech on the monetary policy and financial stability implications of CBDCs, it identified spillovers from cross-border CBDC use as an area needing further research — ranging from capital flight to exchange rate volatility, and even risks of "digital dollarisation or euroisation" in countries with weak currencies and fundamentals. A currency that is easy to hold across borders is also easy to flee into.
The Global Landscape of CBDC Development
This is not a theoretical exercise confined to research departments. The Atlantic Council's tracker — a widely cited live database of CBDC projects — documents extensive exploration across major economies, including G20 members, spanning retail and wholesale designs at research, pilot and launch stages. The breadth of that exploration is itself market-relevant: design decisions being tested today in pilots are the ones that will determine whether disintermediation risk or the information effect dominates.
The emergence of multi-country wholesale projects like mBridge marks a second structural trend. Rather than each central bank building a closed domestic system, groups of central banks are jointly testing shared ledgers for cross-border settlement — the point in the payment chain where correspondent banking friction and currency risk are concentrated.
CBDC Impact: Benefits and Risks Across Financial Sectors
The table below juxtaposes the documented potential positive and negative effects of CBDCs on the three financial system components where the stakes are highest. Reading the benefit and risk columns side by side reveals the core policy trade-off: the same instrument can both introduce and mitigate systemic risk.
| Area of Impact | Potential Benefit | Potential Risk |
|---|---|---|
| Commercial Banking Stability | A well-designed CBDC could enhance stability by giving policymakers real-time information on fund flows, enabling faster crisis response and reducing depositors' incentive to join runs. | Depositors could pull too much money from banks at once by purchasing CBDCs, triggering a run that impairs lending and shocks interest rates — especially in countries with unstable financial systems. |
| Central Bank Operations | CBDC issuance is matched by central bank assets, allowing monetary policy implementation; the liability itself carries no market, credit or liquidity risk in domestic currency (ECB). | A new balance sheet item affects central bank financial risks, profitability, risk-taking and capital in ways that depend on design choices and market reactions (ECB). |
| Cross-Border Transactions | Specialised multi-currency platforms such as mBridge — a custom-built ledger developed by central banks for central banks — suggest efficiency gains; a 2022 BIS pilot completed real-value cross-border transactions. | Cross-border CBDC use could produce spillovers including capital flight, exchange rate volatility, and "digital dollarisation or euroisation" in countries with weak currencies (ECB). |
Every entry carries a qualification. The information benefit is contingent on a well-designed CBDC and effective use of the data by policymakers. The disintermediation risk depends on design choices and market reactions. The cross-border projects remain experimental, and the spillover risks are areas the ECB itself says require further research — potential outcomes, not guaranteed ones.
Assessing the Net Impact on Financial Markets
For investors and business leaders, the synthesis is that CBDCs do not have a single directional impact on financial markets. Their effect on any jurisdiction will be determined by design parameters — how much CBDC use is permitted in normal times, what happens at the boundary between deposits and central bank money, and how cross-border access is governed. The OFR's framework suggests that a currency calibrated for low normal-time use preserves bank funding while preserving the crisis-time signal. The ECB's speech suggests that the cross-border dimension — capital flight and currency substitution — may be the hardest to control from a national perspective.
Two boundaries on this analysis: it does not evaluate any single country's proposed design, and it does not cover consumer privacy. It is also not investment advice. What it offers instead is a framework for reading the policy debate as it unfolds.
Navigating the CBDC Landscape: Key Considerations for Market Participants
Investors, financial professionals, and business leaders should monitor central bank policy statements and pilot project outcomes for CBDCs, particularly regarding design choices that address disintermediation risks and enhance cross-border payment efficiency. The observable signal will be the publication of official central bank reports detailing specific CBDC design features — particularly those related to commercial bank deposit thresholds or liquidity provision mechanisms — and the successful completion or expansion of cross-border wholesale CBDC pilot phases. When those documents appear, the trade-offs mapped above stop being hypothetical and start being priceable.
Sources
- Central Bank Digital Currency Tracker — Atlantic Council
- How would a Central Bank Digital Currency Affect Financial Stability? — Financialresearch
- ECB
- Project mBridge — Bank for International Settlements
- HKMA
- Centralbank
- More than an intellectual game — European Central Bank
