1. Each institution using an internal model shall fulfil, in addition to own funds requirements calculated in accordance with Chapters 2, 3 and 4 for those risk categories for which permission to use an internal model has not been granted, an own funds requirement expressed as the sum of points (a) and (b):
(a) the higher of the following values:
(i) its previous day's value-at-risk number calculated in accordance with Article 365(1) (VaRt-1);
(ii) an average of the daily value-at-risk numbers calculated in accordance with Article 365(1) on each of the preceding sixty business days (VaRavg), multiplied by the multiplication factor (mc) in accordance with Article 366;
(b) the higher of the following values:
(i) its latest available stressed-value-at-risk number calculated in accordance with Article 365(2) (sVaRt-1); and
(ii) an average of the stressed value-at-risk numbers calculated in the manner and frequency specified in Article 365(2) during the preceding sixty business days (sVaRav
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