Credit Rating Scales
Calibrated comparitive risk across agencies operating in Australia. Scores on the left are provided by credit bureaus for retail credit decisioning purposes. Scores on the right are provided credit rating agencies for wholesale credit decisioning purposes. Retail agency ratings are odds ratios used for credit model calibration and comparison purposes. Wholesale agency ratings reflect long term average observed performance and are subject to constant change and may vary according to portfolios, issuer types and instrument types. Scales are compared against predicted annualised default probabilities/rates.
Score scale comparison
The logit transform is commonly used across rating scales describe changes in risk. The log odds (