EBA欧洲银行-Sovereign-Risk-black-swans-and-white-elephants-Andrea-Enria-Adam-Farkas-Lars-Overby-08-July-2016_21页_533kb

Sovereign Risk: Black Swans and White Elephants Summary

Core Content

Sovereign risk is discussed in the context of both 'black swan' and 'white elephant' events. A 'black swan' event refers to a rare and extreme event with some retrospective predictability, while a 'white elephant' risk is one that is costly but difficult to address. The paper argues that sovereign risk is a complex issue that requires a balanced regulatory approach.

Main Views

• Sovereign Risk as a Systemic Threat: The European sovereign debt crisis highlighted the systemic risks posed by banks' excessive concentration in domestic sovereign debt. This home bias can lead to a feedback loop where sovereign defaults impact bank funding and lending conditions, thereby undermining the Single Market for banking services.

• Regulatory Inaction and Complacency: Prior to the crisis, regulatory frameworks did not adequately address sovereign risk, leading to complacency. Banks exhibited limited diversification and significant home bias, which increased vulnerability to sovereign defaults.

• Need for Reform: Despite the 'white elephant' argument that sovereign risk is too rare and costly to manage, the paper advocates for a more risk-sensitive regulatory framework. This includes introducing more accurate valuation methods and standardised disclosure to enhance transparency and encourage active risk management.

Key Information

1. Regulatory Framework and Sovereign Risk

• Credit Risk:

  • Sovereign exposures in the domestic currency are treated as risk-free, with a zero risk weight in the standardised approach (SA).
  • In the EU, this preferential treatment is extended to all 28 Member States, regardless of currency mismatch.
  • The internal ratings-based (IRB) approach introduces non-zero risk weights, but leads to inconsistent capital requirements across banks.

• Liquidity Risk:

  • The Liquidity Coverage Ratio (LCR) and Net Stable Funding Ratio (NSFR) were introduced to address liquidity concerns.
  • Sovereign debt is considered a high-quality liquid asset and is not subject to haircuts, which is seen as a regulatory inconsistency given its use in liquidity buffers.

• Large Exposures:

  • The large exposures framework limits concentration risk for non-sovereign counterparties.
  • Sovereign exposures are explicitly exempt from this framework, which is a major regulatory gap.

2. EBA's Role and Recommendations

• Stress Testing and Valuation:

  • The EBA conducted stress tests in 2011, revealing the need for market valuation of sovereign exposures.
  • A sovereign buffer was introduced, requiring banks to adjust their capital ratios based on market valuations, which had a significant impact on capital adequacy.

• Disclosure and Transparency:

  • Detailed disclosure of sovereign exposures became a key part of the regulatory response.
  • The EBA continues to provide standardised data on sovereign holdings, although this is not yet a formal regulatory requirement.

3. Current Situation and Concerns

• Home Bias:

  • EU banks still exhibit a strong home bias in their sovereign holdings, with over half of their exposures typically directed towards domestic sovereigns.
  • This concentration risk is a direct channel for contagion in times of sovereign debt market turbulence.

• Valuation Practices:

  • Many sovereign exposures are still valued at amortised cost rather than fair value, which can lead to underestimation of losses during market downturns.
  • The paper argues that sovereign assets used to meet liquidity requirements should be measured at fair value to ensure consistency with the LCR.

• Regulatory Gaps:

  • The current regulatory framework does not include specific requirements for regular disclosure of sovereign exposures or address concentration risk effectively.
  • The preferential treatment of sovereign risk remains largely unchanged, even as the Basel Committee has committed to revising other regulatory aspects.

Conclusion

The paper concludes that while sovereign risk cannot be eliminated entirely, a more risk-sensitive regulatory approach is necessary to mitigate its impact. This includes better valuation practices, standardised disclosure, and measures to discourage excessive concentration in domestic sovereign debt. The EBA's experience during the European sovereign debt crisis underscores the importance of these reforms in ensuring a more resilient banking system.