Related provisions for BIPRU 7.10.112
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BIPRU 7.10 provides details of when the FSA expects to allow a firm to use a VaR model (value at risk model) for the purpose of calculating part or all of its PRR. It introduces the concept of a VaR model, the methodology behind it and the link to the standard market risk PRR rules. It then goes on to detail the application and review process. The bulk of BIPRU 7.10 specifies the model standards and risk management standards that firms will be required to meet in order to use
Backtesting conducted only at a whole portfolio level using a single measure of profit and loss has limited power to distinguish an accurate VaR model from an inaccurate one. Backtesting should therefore be regarded as an additional safeguard rather than a primary validation tool. Such testing does however form the basis of the FSA'splus factor system. The test has been chosen as the basis of the backtesting regime because of its simplicity. A firm will therefore be expected to
The FSA will review as part of a firm'sVaR model permission application the processes and documentation relating to the derivation of profit and loss used for backtesting. A firm's documentation should clearly set out the basis for cleaning profit and loss. To the extent that certain profit and loss elements are not updated every day (for example certain reserve calculations) the documentation should clearly set out how such elements are included in the profit and loss series
A backtesting exception is deemed to have occurred for any business day if the hypothetical profit and loss figure3 for that business day shows a loss, which in absolute magnitude, exceeds the one-day VaR measure for that business day. The only exception is if that business day is identified in the firm'sVaR model permission as giving rise to an excluded backtesting exception.3
If a backtesting exception occurs, the firm must notify its usual supervisory contact at the FSA orally by close of business two business days after the business day for which the backtesting exception occurred. Within five business days following the end of each Month, the firm must submit to the FSA a written account of the previous Month'sbacktesting exceptions (if any). This explanation must include the causes of the backtesting exceptions, an analysis of whether the backtesting
(1) This paragraph gives guidance on the backtesting calculation and reporting process in BIPRU 7.10.96R - BIPRU 7.10.104R.(2) Let the day on which the loss referred to in BIPRU 7.10.100R is made be day n. The value-at-risk measure for that day will be calculated on day n-1, or overnight between day n-1 and day n. Profit and loss figures are produced on day n+1, and backtesting also takes place on day n+1. The firm's supervisor should be notified of any backtesting exceptions
(1) This paragraph gives guidance on the process for excluding backtesting exceptions as referred to in BIPRU 7.10.103R.(2) The FSA will respond flexibly to backtesting exceptions. However, the FSA's starting assumption will be that a backtesting exception should be taken into account for the purpose of the calculation of plus factors. If the firm believes that a backtesting exception should not count for that purpose, then it should seek a variation of its VaR model permission
A firm must perform backtesting against a hypothetical profit and loss figure3 with respect to each business day. A hypothetical profit and loss figure3 for a business day means the hypothetical profit and loss figure3 that would have occurred for that business day if the portfolio on which the VaR number for that business day is based remained unchanged.3333
A firm must, no later than the number of business days after the end of each quarter specified in the VaR model permission for this purpose, submit, in respect of that quarter, a report to the FSA about the operation of the VaR model, the systems and controls relating to it and any changes to the VaR model and those systems and controls. Each report must outline as a minimum the following information in respect of that quarter:(1) methodological changes and developments to the