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Working Paper
ENDOGENOUS/EXOGENOUS SEGMENTATION IN THE A-IRB FRAMEWORK AND THE PRO-CYCLICALITY OF CAPITAL: AN APPLICATION TO MORTGAGE PORTFOLIOS
This paper investigates the pro-cyclicality of capital in the advanced internal ratings-based (A-IRB) Basel approach for retail portfolios and identifies the fundamental assumptions required for stable A-IRB risk weights over the economic cycle. Specifically, it distinguishes between endogenous and exogenous segmentation risk drivers and, through application to a portfolio of first mortgages, shows that risk weights remain stable over the economic cycle when the segmentation scheme is derived using exogenous risk drivers, while segmentation schemes that include endogenous risk drivers are ...
Report
The cost of bank regulatory capital
The Basel I Accord introduced a discontinuity in required capital for undrawn credit commitments. While banks had to set aside capital when they extended commitments with maturities in excess of one year, short-term commitments were not subject to a capital requirement. The Basel II Accord sought to reduce this discontinuity by extending capital standards to most short-term commitments. We use these differences in capital standards around the one-year maturity to infer the cost of bank regulatory capital. Our results show that following Basel I, undrawn fees and all-in-drawn credit spreads on ...