In this paper we examine the influence of the granularity of a rating system on the resulting regulatory capital requirements with respect to the framework released by the Basel Committee on Banking Supervision (Basel II). We define granularity as the number of cohorts or rating classes used to...

In this paper we develop a model of the economic value of a credit rating system. Increasing international competition and changes in the regulatory framework driven by the Basel Committee on Banking Supervision (Basel II) called forth incentives for banks to improve their credit rating systems....