2010年-世界发展银行全球_Safe_and_Sound_Banking___A_Role_for_Countercyclical_Regulatory_Requirements__32页_885kb

Safe and Sound Banking: A Role for Countercyclical Regulatory Requirements?

Core Content

This working paper by Gerard Caprio, Jr. explores the role of countercyclical regulatory requirements in mitigating the pro-cyclical tendencies of the banking sector, which contributed to the 2007-2009 financial crisis. The paper argues that while countercyclical policies may help reduce the risk of financial instability, their effectiveness and implementation are subject to significant challenges.

Main Points

1. Pro-cyclical Banking Behavior

• Definition: Pro-cyclical behavior refers to banks easing lending standards during economic booms and tightening them during contractions.
• Causes:
  • Information asymmetries lead bankers to lend more when borrower net worth and collateral values are high.
  • Regulatory frameworks, such as Basel II, can inadvertently institutionalize pro-cyclical behavior by relying on short-term data and ratings that are often inflated during booms.
  • Excessive compensation for generating business during booms, without accountability for future losses, encourages risk-taking.
• Consequences:
  • Pro-cyclical lending leads to greater losses and forced asset sales during downturns.
  • It exacerbates asset price volatility and makes it harder for individuals and firms to plan for the future.

2. Rationale for Countercyclical Regulation

• Need for Stability: Financial crises often result from the overconfidence and lack of foresight during booms. Reducing pro-cyclical tendencies can help prevent such crises.
• Regulatory Failures: Discretionary supervision has proven inadequate in preventing pro-cyclical behavior, as seen in the U.S. and other countries.
• Alternative Approaches:
  • Countercyclical provisioning: Banks adjust provisions based on the credit cycle, increasing them during booms and decreasing during downturns.
  • Countercyclical capital requirements: These would require banks to hold more capital during periods of high credit growth, thereby reducing risk-taking.

3. Experiments with Countercyclical Provisioning

• Spain and Colombia: These countries have implemented countercyclical provisioning policies.
• Spain's Approach:
  • Introduced statistical or dynamic provisioning in 2000.
  • The formula for generic provisions is:
    $$
    \text{Generic provisions} = \alpha \Delta \text{Credit} + \beta \text{Credit} - \text{Specific provisions}
    $$
    • $\alpha$ is between 0 and 2.5.
    • $\beta$ is between 0 and 1.64.
  • Statistical provisions are based on "latent exposure" (potential future losses not yet recognized) and are limited to between 0 and 3 times this exposure.
  • Initially, the impact on total provisions was modest due to offsetting decreases in specific provisions.
• Colombia's Approach: Followed Spain's model, but with limited implementation and data, making it difficult to assess effectiveness.
• Limitations:
  • These experiments are too recent and limited in scope to be considered robust.
  • The effectiveness of countercyclical provisioning is often overstated, as seen in the lack of enforcement in the U.S. during the crisis.

4. Concerns and Implementation Issues

• Effectiveness:
  • There is no clear evidence that countercyclical requirements will significantly curb risk-taking.
  • Theoretical and empirical studies suggest that such measures may not be sufficient to address underlying issues.
• Regulatory Arbitrage:
  • Tightening requirements in one area may lead to risk shifting to other regions or institutions.
  • This has been observed in the use of Structured Investment Vehicles (SIVs) to evade capital limits.
• Underestimation of Risk:
  • Current capital requirements may be insufficient, especially if based on short and mild recessions.
  • There is a need to consider the optimal time horizon for estimating risk and the trade-off between safety and economic growth.

5. Recommendations

• Focus on Information and Incentive Problems: Rather than relying solely on countercyclical regulations, authorities should address the root causes of pro-cyclical behavior, such as information asymmetries and misaligned incentives.
• Caution with Automatic Policies: While automatic regulatory levers may seem effective, they can be misused or fail to account for complex financial dynamics, as seen in the U.S. S&L crisis.
• Further Research: The paper suggests that more research is needed to evaluate the effectiveness of countercyclical measures and to refine them for broader application.

Conclusion

Countercyclical regulatory requirements, such as dynamic provisioning, may offer some benefits in reducing pro-cyclical tendencies, but their implementation and effectiveness are limited. The paper cautions against over-reliance on such measures and emphasizes the importance of addressing underlying governance and incentive issues within the financial sector.