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L Sankar, Jure Skarabot

Citigroup credit derivatives specialists explain why the Gaussian copula model, despite its flaws, is still the market standard for analysing correlation

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Q: In layman's terms, how was the Gaussian copula model developed and what modelling assumptions does it make?

A: The Gaussian copula model (GCM) is used for generating the distribution of correlated defaults in a portfolio of credits. The GCM has established itself as the market standard model for pricing tranches of synthetic collateralised debt obligations (CDOs). The mathematical framework for

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