【IMF】央行数字货币与金融稳定：资产负债表分析与政策选择-2024_75页_1mb

Summary of "Central Bank Digital Currencies and Financial Stability: Balance Sheet Analysis and Policy Choices"

Core Content

This IMF Working Paper analyzes the financial stability implications of issuing retail Central Bank Digital Currencies (CBDCs) and evaluates the policy choices that central banks can adopt to mitigate potential adverse effects. The paper emphasizes the importance of understanding how CBDC issuance impacts the balance sheets of both the central bank and the banking sector, and how these changes affect the stability of the financial system.

Main Viewpoints

• CBDC Impacts on Balance Sheets: The introduction of CBDC can lead to significant changes in the balance sheets of both central banks and commercial banks, depending on the issuance method, the demand for CBDC, and the existing financial conditions.
• Adverse Effects on Financial Stability: The risks to financial stability are more pronounced when CBDC issuance leads to an expansion of the central bank's balance sheet, and when commercial banks are forced to use more costly or volatile funding sources.
• Policy Choices: The paper discusses a range of policy options, including macroprudential measures, expansion of central bank lending, and CBDC design features, to manage these risks.
• CBDC Design Matters: Encouraging CBDC use as a means of payment rather than a store of value is critical to maintaining financial stability. Features such as zero or negative remuneration, holding limits, and interoperability with traditional payment systems can help achieve this.

Key Information

1. CBDC Issuance Scenarios

• Baseline Scenario: CBDC issuance does not significantly disrupt the existing balance sheets of the central bank or commercial banks, especially if it replaces physical cash.
• CBDC Replacement Scenarios: In these scenarios, the central bank issues CBDC in exchange for existing deposits or reserves, which can lead to changes in the funding structure of the banking system. If CBDC replaces deposits, it may lead to disintermediation, reducing banks' ability to generate profits and increasing the risk of bank runs.
• Impact on Funding Sources: If the central bank's balance sheet expands due to CBDC issuance, commercial banks may need to rely more on wholesale funding or non-bank financial institutions (NBFIs), which could be more costly or volatile.

2. Implications for Financial Stability

• Steady State: Adverse effects are generally smaller, but can increase if CBDC adoption is rapid or if banks are forced to reduce reliance on deposits.
• Adoption Phase: The risks depend on the preconditions of the financial system, such as the level of excess reserves held by commercial banks and the central bank's willingness to increase reserves.
• Crisis Times: The risk of digital runs increases, as CBDC may be perceived as a safer alternative to bank deposits, leading to a potential liquidity crisis for the banking system.

3. Policy Options to Mitigate Risks

• Macroprudential Policy: Can help increase bank resilience, but alone may not be sufficient to address liquidity and credit intermediation risks.
• Central Bank Lending Expansion: Central banks can increase liquidity provision to commercial banks, especially during crises, but this must be done carefully to avoid exposing the central bank's balance sheet to additional risks.
• CBDC Design: A well-designed CBDC that promotes payment usage rather than store of value can reduce the risk of disintermediation and maintain financial stability. Key design elements include:
  • Zero or Negative Remuneration for CBDC balances.
  • Holding Limits to prevent excessive accumulation of CBDC.
  • Interoperability with traditional payment systems to ensure seamless transactions.
• Regulatory Measures: Strengthening the regulation and supervision of private stablecoins and NBFIs is important to prevent them from undermining financial stability.

4. Conclusion

• The "do no harm" principle is central to the design and implementation of CBDCs.
• CBDC design plays a crucial role in mitigating financial stability risks.
• Policy coordination between macroprudential and monetary policy tools is essential to ensure that CBDC issuance supports financial stability.

Key Takeaways

• CBDC issuance can have positive effects on the central bank's objectives, including cost reduction, financial inclusion, and payment system improvement.
• However, adverse effects on financial stability may arise if CBDC replaces deposits and reduces the central bank's ability to provide liquidity.
• Network effects and adoption rates are important factors that influence the stability of the financial system.
• Central bank design choices and policy responses are critical in managing the risks associated with CBDC issuance.

References and Supporting Tables

• The paper includes glossary, executive summary, scenario analysis, and quantitative indicators to support its findings.
• Tables and boxes are used to illustrate the balance sheet changes, prudential ratios, and CBDC design implications.

This analysis provides a comprehensive framework for understanding the financial stability risks of CBDC and the policy choices available to central banks to address them.