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AI Summary of Article 259 Calculation of risk-weighted exposure amounts under the SEC-IRBA
This document outlines the SEC-IRBA framework for calculating risk-weighted exposure amounts for securitisation positions. It establishes a method to determine applicable risk weights based on the characteristics of exposures, such as their granularity and whether they fall under retail or non-retail categories.
Importantly, when dealing with mixed pools of exposures, separate assessments for retail and non-retail subpools are mandated, with a specific focus on the effective number of exposures and the average loss given default (LGD). Additionally, institutions may apply simplified calculations when the largest exposure is minimal, while provisions are in place for derivative securities linked to securitisation.
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Article 259 Calculation of risk-weighted exposure amounts under the SEC-IRBA
1. Under the SEC-IRBA, the risk-weighted exposure amount for a securitisation position shall be calculated by multiplying the exposure value of the position calculated in accordance with Article 248 by the applicable risk weight determined as follows, in all cases subject to a floor of 15 %:
where:
where:
where:
where:
The parameters A, B, C, D, and E shall be determined according to the following look-up table:
|
|
A |
B |
C |
D |
E |
|
|
Non-retail |
Senior, granular (N ≥ 25) |
0 |
3,56 |
– 1,85 |
0,55 |
0,07 |
|
Senior, non-granular (N < 25) | ||||||