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Internal ratings, the business cycle, and capital requirements: some evidence from an emerging market economy
The concept of risk-based capital requirements enjoys widespread support. Effective implementation, however, requires that risk be measured accurately both across borrowers and across time. Under the New Capital Accord, the cornerstone of this risk measurement process is the rating of the borrower. In this paper we use the ratings assigned by individual Mexican banks to examine how measured credit risk for these banks has changed since the financial crisis in the mid 1990s. We then examine the implications of these changes for regulatory capital under the proposed changes to the Basel Capital ...