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10.4.7 Recognition of Internally Determined Correlations

الرقم: BCS 290 التاريخ (م): 2006/6/12 | التاريخ (هـ): 1427/5/16 الحالة: No longer applicable
This paragraph describes a series of quantitative standards that will apply to internally generated operational risk measures for purposes of calculating the regulatory minimum capital charge. 
 
(a)Any internal operational risk measurement system must be consistent with the scope of operational risk defined by the Committee in paragraph 644, International Convergence of Capital Measurement and Capital Standards – June 2006, and the loss event types defined in Annex 9, International Convergence of Capital Measurement and Capital Standards – June 2006
 
(b)Supervisors will require the bank to calculate its regulatory capital requirement as the sum of expected loss (EL) and unexpected loss (UL), unless the bank can demonstrate that it is adequately capturing EL in its internal business practices. That is, to base the minimum regulatory capital requirement on UL alone, the bank must be able to demonstrate to the satisfaction of its national supervisor that it has measured and accounted for its EL exposure.
 
(c)A bank‘s risk measurement system must be sufficiently “granular” to capture the major drivers of operational risk affecting the shape of the tail of the loss estimates.
 
(d)Risk measures for different operational risk estimates must be added for purposes of calculating the regulatory minimum capital requirement. However, the bank may be permitted to use internally determined correlations in operational risk losses across individual operational risk estimates, provided it can demonstrate to the satisfaction of the national supervisor that its systems for determining correlations are sound, implemented with integrity, and take into account the uncertainty surrounding any such correlation estimates (particularly in periods of stress). The bank must validate its correlation assumptions using appropriate quantitative and qualitative techniques.
 
(e)Any operational risk measurement system must have certain key features to meet the supervisory soundness standard set out in this section. These elements must include the use of internal data, relevant external data, scenario analysis and factors reflecting the business environment and internal control systems.
 
(f)A bank needs to have a credible, transparent, well-documented and verifiable approach for weighting these fundamental elements in its overall operational risk measurement system. For example, there may be cases where estimates of the 99.9th percentile confidence interval based primarily on internal and external loss event data would be unreliable for business lines with a heavy-tailed loss distribution and a small number of observed losses. In such cases, scenario analysis, and business environment and control factors, may play a more dominant role in the risk measurement system. Conversely, operational loss event data may play a more dominant role in the risk measurement system for business lines where estimates of the 99.9th percentile confidence interval based primarily on such data are deemed reliable. In all cases, the bank‘s approach for weighting the four fundamental elements should be internally consistent and avoid the double counting of qualitative assessments or risk mitigants already recognized in other elements of the framework.
 
(Refer para 669, International Convergence of Capital Measurement and Capital Standards – June 2006