This paper first provides a simple but very general framework for credit portfolio modellingwhich is based on the distinction between systematic and unsystematic risk. Unsystematicor borrower-specific risk vanishes through diversification in a very large, infinitelyfine-grained portfolio. The...

Value at risk (VaR) is today the standard tool in risk management for banks and other financial institutions. It is defined as the worst loss for a given confidence level: For a confidence level of e.g. p=99%, one is 99% certain that at the end of a chosen risk horizon there will be no greater...

This paper derives indicators of the severity and structure of banking system risk from asymptotic interdependencies between banks’ equity prices. We use new tools available from multivariate extreme value theory to estimate individual banks’ exposure to each other (“contagion risk”) and...

This paper discusses the relationship between bank size and risk-taking under Pillar I of the New Basel Capital Accord. Using a model with imperfect competition and moral hazard, we find that small banks (and hence small borrowers) may profit from the introduction of an internal ratings based...

We show that multi-bank loan pools improve the risk-return profile of banks' loan business. Banks write simple contracts on the proceeds from pooled loan portfolios, taking into account the free-rider problems in joint loan production. Thus, banks benefit greatly from diversifying credit risk...

We model EU countries' bank ratings using financial variables and allowing for intercept and slope heterogeneity. Our aim is to assess whether 'old' and 'new' EU countries are rated differently and to determine whether 'new' ones are assigned lower ratings, ceteris paribus, than 'old' ones. We...

We model EU countries' bank ratings using financial variables and allowing for intercept and slope heterogeneity. Our aim is to assess whether old and new EU countries are rated differently and to determine whether new ones are assigned lower ratings, ceteris paribus, than old ones. We find that...