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arXiv 0904.1771q-fin.RM
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参数不确定条件下操作风险资本要求的估计

Estimation of Operational Risk Capital Charge under Parameter Uncertainty

Pavel V. Shevchenko

摘要:

许多银行采用损失分布法来量化巴塞尔II要求下的操作风险资本要求。通常的做法是使用年损失分布的0.999分位数来估计资本费用,该分位数是使用频率和严重程度分布参数的点估计值计算的。参数估计的不确定性通常被忽略。对银行来说,考虑参数不确定性的一个令人不快的后果是资本要求的增加。本文演示了如何参数的不确定性可以考虑使用贝叶斯框架,也允许将专家意见和外部数据的估计过程。

英文摘要:

Many banks adopt the Loss Distribution Approach to quantify the operational risk capital charge under Basel II requirements. It is common practice to estimate the capital charge using the 0.999 quantile of the annual loss distribution, calculated using point estimators of the frequency and severity distribution parameters. The uncertainty of the parameter estimates is typically ignored. One of the unpleasant consequences for the banks accounting for parameter uncertainty is an increase in the capital requirement. This paper demonstrates how the parameter uncertainty can be taken into account using a Bayesian framework that also allows for incorporation of expert opinions and external data into the estimation procedure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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