This paper uses the market-standard Gaussian copula model to show that fair spreads on CDO tranches are much higher than fair spreads on similarly-rated corporate bonds. It implies that credit ratings are not sufficient for pricing, which is surprising given their central role in structured...

This paper takes a look at two areas where the subprime crisis has triggered debate and is paving the way for possible movement towards greater global regulation: international banking supervision and the role of credit rating agencies. It surveys the varied range of opinions on the role that...