Allowing banks to hold less capital against loans to borrowers who have received a favorable rating by an approved rating agency may result in a rating system that neither reveals risk information about borrowers nor protects the deposit insurance fund. Part of the problem is the very idea of basing portfolio risk evaluation on the sum of individual loan risks, but there are also important incentive issues.
Allowing banks to hold less capital against loans to borrowers who have received a favorable rating by an approved rating agency may result in a rating system that neither reveals risk information about borrowers nor protects the deposit insurance fund. Part of the problem is the very idea of bas...