Article 170 › 3

The structure of rating systems for retail exposures shall comply with the following requirements: (a) rating systems shall reflect both obligor and transaction risk, and shall capture all relevant obligor and transaction characteristics; (b) the level of risk differentiation shall ensure that the number of exposures in a given grade or pool is sufficient to allow for meaningful quantification and validation of the loss characteristics at the grade or pool level. The distribution of exposures and obligors across grades or pools shall be such as to avoid excessive concentrations; (c) the process of assigning exposures to grades or pools shall provide for a meaningful differentiation of risk, for a grouping of sufficiently homogenous exposures, and shall allow for accurate and consistent estimation of loss characteristics at grade or pool level. For purchased receivables the grouping shall reflect the seller's underwriting practices and the heterogeneity of its customers.

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Source: EUR-Lex CELLAR · retrieved 2026-09-04