At some point during Current Expected Credit Losses (CECL) exam preparation, most model risk and validation teams hit the same wall. The DCF logic holds, the segmentation is defensible, and the documentation passes initial review. The exposure surfaces when the examiner asks what external data supports PD assumptions for the unrated portion of the commercial […] The post CECL Model Validation: How to Benchmark PD Assumptions for Private and Unrated Borrowers appeared first on Credit Benchmark .