Long-term Rating Scales Comparison

The Basel Committee's consultative document The New Basel Capital Accord proposes the use of external credit assessments as the basis for risk weighting credit exposures under the standardised approach. For illustrative purposes, the consultative document used the rating notation used by Standard & Poor's. To assist banks participating in the Committee's Quantitative Impact Study, the following tables match credit ratings of Standard & Poor's with comparable ratings of Moody's and Fitch IBCA. For further information regarding the mapping of external credit ratings to risk weightings, please see The New Basel Capital Accord beginning at paragraph 23.