Methods for calculating the exposure value
An institution which does not meet the conditions set out in Article 273a(1) shall not use the method set out in Section 4. An institution which does not meet the conditions set out in Article 273a(2) shall not use the method set out in Section 5.
Institutions may use in combination the methods set out in Sections 3 to 6 on a permanent basis within a group. A single institution shall not use in combination the methods set out in Sections 3 to 6 on a permanent basis.
Where permitted by the competent authorities in accordance with Article 283(1) and (2), an institution may determine the exposure value for the following items using the Internal Model Method set out in Section 6:
the contracts listed in Annex II;
securities or commodities lending or borrowing transactions;
When an institution purchases protection through a credit derivative against a non-trading book exposure or against a counterparty risk exposure, it may calculate its own funds requirement for the hedged exposure in accordance with either of the following:
Articles 233 to 236;
in accordance with Article 153(3), or Article 183, where permission has been granted in accordance with Article 143.
By way of derogation from the first subparagraph, where one margin agreement applies to multiple netting sets with that counterparty and the institution is using one of the methods set out in Sections 3 to 6 to calculate the exposure value of those netting sets, the exposure value shall be calculated in accordance with the relevant Section.
For a given counterparty, the exposure value for a given netting set of OTC derivative instruments listed in Annex II calculated in accordance with this Chapter shall be the greater of zero and the difference between the sum of exposure values across all netting sets with the counterparty and the sum of credit valuation adjustments for that counterparty being recognised by the institution as an incurred write-down. The credit valuation adjustments shall be calculated without taking into account any offsetting debit value adjustment attributed to the own credit risk of the firm that has been already excluded from own funds in accordance with point (c) of Article 33(1).
For the purposes of the first subparagraph, two OTC derivative contracts are perfectly matching when they meet all the following conditions:
their risk positions are opposite;
their features, with the exception of the trade date, are identical;
their cash flows fully offset each other.