This report presents the outcomes of the Basel Committee on Banking Supervision's work to ensure international convergence on regulations governing the capital adequacy of internationally active banks. It outlines the agreed framework for measuring capital adequacy and the minimum standards that national supervisory authorities will need to adopt. The Committee encourages authorities to consider adopting this…
The document entitled "Basel II - International Convergence of Capital Measurement and Capital Standards: Comprehensive Version" is a standard published in June 2006 by the Basel Committee on Banking Supervision. It compiles the Basel II framework of June 2004, the unrevised elements of the 1988 Accord, the 1996 amendment for market risks, as well as the 2005 document on the application of Basel II to trading activities and the treatment of double default effects. The scope covers international regulation on the adequacy of capital for internationally active banks, including minimum capital requirements, supervisory review, and market discipline, for the implementation period planned from end 2006 (p. 1, 15).
The document presents the revised Basel II framework, aimed at strengthening the soundness and stability of the international banking system while ensuring fair competition among internationally active banks (p. 15-16). This framework rests on three pillars: (1) minimum capital requirements adapted to credit, market, and operational risks; (2) supervisory review process by supervisory authorities; (3) market discipline through transparency and disclosure requirements.
Key innovations include increased risk sensitivity, notably through the use of banks' internal risk assessment systems (Internal Ratings-Based - IRB approach), subject to strict validation and control conditions (p. 16, 18). The framework maintains the minimum capital threshold at 8% of risk-weighted assets, with a three-tier capital definition (Tier 1, Tier 2, Tier 3) and precise limits on their composition (p. 26, 28-32).
The framework provides alternative approaches for calculating capital requirements, notably a standardized approach based on external ratings, and a more advanced IRB approach, as well as specific rules for market, operational risks, and securitization (p. 19, 26, 33).
Transitional provisions are planned, including capital floors based on the old 1988 Accord to accompany the gradual implementation of advanced approaches (p. 27). The framework stresses the need for enhanced cooperation among national authorities, notably between home and host country supervisors (p. 17).
Finally, the document highlights the importance of the second and third pillars to ensure the robustness of the system, notably through rigorous review of banks' internal practices and increased transparency towards markets (p. 16, 18, 31). The objective is to encourage better risk management and international convergence of prudential practices, while allowing some national flexibility to adapt the framework to local specificities (p. 16-17).
The Basel II framework was developed to revise and improve the 1988 Accord on bank capital adequacy, to better reflect current risks and risk management practices of international banks (p. 15).
In response to the evolution of financial markets and risk management methods, the Basel Committee conducted several consultations and impact studies between 1999 and 2003, involving supervisory authorities and banks, to achieve a more risk-sensitive and flexible framework (p. 15).
The main challenges are to strengthen global financial stability, avoid competitive distortions among international banks, and encourage improvements in risk management practices. The framework also aims to integrate credit, market, and operational risks in a coherent approach while maintaining a minimum capital threshold (p. 16).
The scope covers internationally active banks and their consolidated groups, with specific rules for subsidiaries, significant holdings, insurance entities, and investments in commercial entities (p. 21-24).
The framework is designed to be evolving, with phased implementation from end 2006, and provides monitoring and adaptation mechanisms based on feedback (p. 15, 26-28).
1. Scope and consolidation (p. 21-25):
- The framework applies on a consolidated basis to international banking groups, including all majority-owned banking and financial entities.
- Significant minority holdings are either deducted or proportionally consolidated according to national practices.
- Investments in insurance entities are generally deducted, except for national exceptions, with possible recognition of excess capital under strict conditions.
- Significant investments in commercial entities are deducted beyond materiality thresholds (e.g., 15% of capital for an individual investment).
2. Regulatory capital composition (p. 28-32):
- Capital is structured into Tier 1 (core capital, at least 50% of total), Tier 2 (supplementary capital limited to 100% of Tier 1), and Tier 3 (short term, limited to 250% of required Tier 1 capital for market risks).
- Tier 1 includes common shares and disclosed reserves.
- Tier 2 includes undisclosed reserves, prudential revaluation reserves, limited general provisions, hybrid instruments, and amortizable long-term subordinated debt.
- Tier 3 is reserved for short-term capital to cover market risks.
- Certain deductions are mandatory, notably goodwill, non-consolidated investments, and artificial cross-holdings.
3. Minimum capital requirements (p. 26-28):
- The total minimum capital ratio is set at 8% of risk-weighted assets.
- Risk-weighted assets include credit, market, and operational risks.
- Two methods are proposed for credit risk: standardized approach (based on external ratings) and IRB approach (based on banks' internal ratings).
- A scaling factor of 1.06 is applied to risk-weighted assets under the IRB approach to maintain overall capital level.
- Capital floors based on the old 1988 Accord are applied during the transition period for banks adopting advanced approaches.
4. Standardized approach for credit risk (p. 33-35):
- Exposures are weighted according to risk categories based on external ratings (e.g., AAA to AA-: 0%, BBB+ to BBB-: 50%, etc.).
- Exposures to sovereigns, banks, public entities, and multilateral development banks are treated under specific rules.
- National authorities have some discretion to adapt weights, notably for exposures in local currency.
5. Internal Ratings-Based (IRB) approach (p. 15, 18):
- Allows banks to use their own internal risk assessment systems subject to approval and strict conditions.
- Encourages better risk management and increased sensitivity of capital requirements.
- Requires rigorous internal controls, model validation, and supervisor oversight.
6. Market and operational risks (p. 26, 144-157):
- The framework includes capital requirements for market risks, with standardized methods and internal model-based approaches.
- For operational risk, three methods are proposed: basic indicator approach, standardized approach, and advanced measurement approaches (AMA).
- Qualification and validation criteria are defined for each method.
7. Supervisory review process (Second Pillar) (p. 204-219):
- Supervisory authorities must assess capital adequacy beyond minimum requirements.
- The process includes risk assessment, monitoring management practices, and taking corrective actions.
- Enhanced cooperation among national supervisors is encouraged.
8. Market discipline (Third Pillar) (p. 226-242):
- Disclosure requirements of qualitative and quantitative information are provided to increase transparency.
- This information enables markets to exert discipline on banks, complementing the first two pillars.
9. Transitional provisions and implementation (p. 26-28):
- Transition periods are planned for adopting advanced approaches, with progressive capital floors.
- Supervisors have leeway to adapt rules according to national conditions.
- The Committee will monitor application and may adjust the framework based on feedback.
Established facts:
- The Basel II framework sets a minimum capital ratio of 8% of risk-weighted assets, with a precise definition of capital components (Tier 1, Tier 2, Tier 3) and consolidation rules for banking groups (p. 26, 28, 21).
- Two main approaches are proposed for credit risk calculation: standardized (based on external ratings) and IRB (based on internal ratings), with strict validation and control requirements for IRB (p. 33, 15, 18).
- Specific requirements are defined for market and operational risks, with several possible calculation methods (p. 26, 144).
- Capital floors based on the old accord are applied during the transition to guarantee a minimum capital level (p. 27).
Assumptions:
- The scaling factor of 1.06 applied to risk-weighted assets under the IRB approach is an estimate based on quantitative impact studies (p. 26).
- The framework assumes that banks and supervisors will implement necessary controls and validations to ensure the reliability of internal risk assessments (p. 16, 18).
Interpretations:
- Increased use of internal risk assessment systems should improve the sensitivity of capital requirements to the actual risks incurred by banks (p. 16).
- The flexibility granted to national authorities to adapt certain rules aims to reconcile international harmonization and local specificities but requires increased vigilance to avoid distortions (p. 16-17).
Uncertainties:
- The effectiveness of the framework will depend on the quality of banks' internal systems and the rigor of supervisors in their validation and oversight (p. 16, 18).
- The long-term impact of advanced approaches on financial stability and competition among banks remains to be observed, notably due to national differences in application (p. 17).
- The evolution of financial markets and risk management practices may require future revisions of the framework (p. 15).
The Basel Committee concludes that the revised Basel II framework represents a major step forward to strengthen the stability of the international banking system by introducing increased risk sensitivity and better consideration of banks' internal practices (p. 15-16).
It recommends that national authorities proceed with adoption and implementation of the framework according to a schedule adapted to their national priorities, taking into account local specificities and ensuring close cooperation between national and international supervisors (p. 15, 17).
The Committee stresses the importance of rigorous implementation of the second and third pillars, notably supervisory review and market discipline, to effectively complement minimum capital requirements (p. 16, 18, 31).
It foresees continuous monitoring of the framework's application, with possible adjustments based on feedback and market developments (p. 15, 26-28).
Finally, the Committee highlights the need for ongoing dialogue with the banking industry to improve understanding and comparability of internal risk assessment models, and to prepare future framework evolutions (p. 18-19).
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