3.3. Ratings Based Method

Under the Ratings Based Method, the risk-weighted exposure amount of a rated securitisation position shall be calculated by applying to the exposure value the risk weight associated with the credit quality step with which the credit assessment has been determined to be associated by the competent authorities in accordance with Article 98, as set out in the Tables 4 and 5, multiplied by 1,06. Table 4 Positions other than ones with short-term credit assessments Credit Quality Step (CQS) Risk weight A B C CQS 1 7 % 12 % 20 % CQS 2 8 % 15 % 25 % CQS 3 10 % 18 % 35 % CQS 4 12 % 20 % 35 % CQS 5 20 % 35 % 35 % CQS 6 35 % 50 % 50 % CQS 7 60 % 75 % 75 % CQS 8 100 % 100 % 100 % CQS 9 250 % 250 % 250 % CQS 10 425 % 425 % 425 % CQS 11 650 % 650 % 650 % Below CQS 11 1250 % 1250 % 1250 % Table 5 Positions with short term credit assessments Credit Quality Step (CQS) Risk weight A B C CQS 1 7 % 12 % 20 % CQS 2 12 % 20 % 35 % CQS 3 60 % 75 % 75 % All other credit assessments 1250 % 1250 % 1250 % Subject to points 48 and 49, the risk weights in column A of each table shall be applied where the position is in the most senior tranche of a securitisation. When determining whether a tranche is the most senior, it is not required to take into consideration amounts due under interest rate or currency derivative contracts, fees due, or other similar payments. A risk weight of 6 % may be applied to a position in the most senior tranche of a securitisation where that tranche is senior in all respects to another tranche of the securitisation positions which would receive a risk weight of 7 % under point 46, provided that: the competent authority is satisfied that this is justified due to the loss absorption qualities of subordinate tranches in the securitisation; and either the position has an external credit assessment which has been determined to be associated with credit quality step 1 in Table 4 or 5 or, if it is unrated, requirements (a) to (c) in point 42 are satisfied where ‘reference positions’ are taken to mean positions in the subordinate tranche which would receive a risk weight of 7 % under point 46. The risk weights in column C of each table shall be applied where the position is in a securitisation where the effective number of exposures securitised is less than six. In calculating the effective number of exposures securitised multiple exposures to one obligor must be treated as one exposure. The effective number of exposures is calculated as: N = (Σ_(i)EAD_(i))^(2) / Σ_(i)EAD_(i^(2)) where EAD_(i) represents the sum of the exposure values of all exposures to the i^(th) obligor. In the case of resecuritisation (securitisation of securitisation exposures), the credit institution must look at the number of securitisation exposures in the pool and not the number of underlying exposures in the original pools from which the underlying securitisation exposures stem. If the portfolio share associated with the largest exposure, C_(1), is available, the credit institution may compute N as 1/C_(1). The risk weights in Column B shall be applied to all other positions. Credit risk mitigation on securitisation positions may be recognised in accordance with points 60 to 62.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-09 · Text as adopted (Official Journal); later amendments are not incorporated in this text.