Artikel 236 Berechnung der risikogewichteten Positionsbeträge und erwarteten Verlustbeträge im Rahmen des Substitutionsansatzes, wenn die garantierte Risikoposition im Rahmen des IRB-Ansatzes ohne Verwendung eigener Schätzungen der LGD behandelt wird und eine vergleichbare direkte Risikoposition gegenüber dem Sicherungsgeber im Rahmen des IRB-Ansatzes behandelt wird

For an exposure with unfunded credit protection to which an institution applies the IRB Approach set out in Chapter 3, but without using its own estimates of LGD, and where comparable direct exposures to the protection provider are treated under the IRB Approach set out in Chapter 3, the institution shall determine the covered part of the exposure as the lower of the exposure value (E) and the adjusted value of the unfunded credit protection (GA).

Institutions that apply the IRB Approach to comparable direct exposures to the protection provider using own estimates of PD shall calculate the risk-weighted exposure amount and the expected loss amount for the covered part of the exposure value by using the PD of the protection provider and the LGD applicable for a comparable direct exposure to the protection provider as referred to in Article 161(1), in accordance with paragraph 1b of this Article. For subordinated exposures and non-subordinated unfunded credit protection, the LGD to be applied by institutions to the covered part of the exposure value shall be the LGD associated with senior claims and the institutions may account for any funded credit protection securing the unfunded credit protection in accordance with this Chapter.

Institutions shall calculate the risk weight and expected loss applicable to the covered part of the underlying exposure using the PD, the LGD specified in paragraph 1a of this Article, and the same risk weight function as the ones used for a comparable direct exposure to the protection provider, and shall, where applicable, use the maturity (M) related to the underlying exposure, calculated in accordance with Article 162.

Institutions that apply the IRB Approach to comparable direct exposures to the protection provider using the method provided for in Article 153(5) shall use the risk weight and expected loss applicable to the covered part of the exposure that correspond to the ones provided for in Articles 153(5) and 158(6).

Notwithstanding paragraph 1c of this Article, institutions that apply the IRB Approach to guaranteed exposures using the method provided for in Article 153(5) shall calculate the risk weight and expected loss applicable to the covered part of the exposure using the PD, the LGD applicable for a comparable direct exposure to the protection provider as referred to in Article 161(1), in accordance with paragraph 1b of this Article, and the same risk weight function as the ones used for a comparable direct exposure to the protection provider, and shall, where applicable, use the maturity (M) related to the underlying exposure, calculated in accordance with Article 162. For subordinated exposures and non-subordinated unfunded credit protection, the LGD to be applied by institutions to the covered part of the exposure value shall be the LGD associated with senior claims and the institutions may account for any funded credit protection securing the unfunded credit protection in accordance with this Chapter.

For any uncovered part of the exposure value (E), institutions shall use the risk weight and the expected loss corresponding to the underlying exposure. For the calculation set out in Article 159, institutions shall assign any general or specific credit risk adjustments or additional value adjustments in accordance with Article 34 related to the non-trading book business of the institution or other own funds reductions related to the exposure other than the deductions made in accordance with Article 36(1), point (m), to the uncovered part of the exposure value.

For the purposes of this Article, (GA) is the amount of credit protection adjusted for foreign exchange risk (G*) as calculated under Article 233(3) further adjusted for any maturity mismatch as laid down in Section 5 of this Chapter. The exposure value (E) is the exposure value determined in accordance with Chapter 3, Section 5. Institutions shall calculate the exposure value for off-balance-sheet items other than derivatives treated under the IRB Approach using a CCF of 100 % instead of the SA-CCFs or IRB-CCF provided for in Article 166(8), (8a) and (8b).