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AI Summary of Article 325bf Regulatory back-testing requirements and multiplication factors
This Article defines 'overshooting' as a one-day portfolio value change exceeding the calculated value-at-risk (VaR) using an alternative internal model. Institutions must perform back-testing for daily overshootings to ensure compliance with specific thresholds, which depend on the percentile confidence intervals applied.
Competent authorities may allow deviations from standard counting procedures under certain circumstances, particularly where overshootings stem from non-modellable risk factors. Monitoring by authorities will assess the appropriateness of the multiplication factor related to the institution's VaR calculations and compliance with back-testing requirements.
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Article 325bf Regulatory back-testing requirements and multiplication factors
1. For the purposes of this Article, an 'overshooting' means a one-day change in the value of a portfolio composed of all the positions assigned to the trading desk that exceeds the related value-at-risk number calculated on the basis of the institution's alternative internal model in accordance with the following requirements:
(a) the calculation of the value at risk shall be subject to a one-day holding period;
(b) scenarios of future shocks shall apply to the risk factors of the trading desk's positions referred to in Article 325bg(3) and which are considered modellable in accordance with Article 325be;
(c) data inputs used to determine the scenarios of future shocks applied to the modellable risk factors shall be calibrated to historical data referred to in point (c) of Article 325bc(4);
(d) unless stated otherwise in this Article, the institution's alternative internal model shall be based on the same modelling assumptions as those used for the calculation of the expected shortfall risk measure referred to in point (a) of Article 325ba(1).