Regime switches in the dependence structure of multidimensional financial data

Misperceptions about extreme dependencies between different financial assets have been an important ele- ment of the recent financial crisis. This paper studies inhomogeneity in dependence structures using Markov switching regular vine copulas. These account for asymmetric dependencies and tail dependencies in high dimensional data. We develop methods for fast maximum likelihood as well as Bayesian inference. Our algo- rithms are validated in simulations and applied to financial data. We find that regime switches are present in the dependence structure of various data sets and show that regime switching models could provide tools for the accurate description of inhomogeneity during times of crisis.     «

Misperceptions about extreme dependencies between different financial assets have been an important ele- ment of the recent financial crisis. This paper studies inhomogeneity in dependence structures using Markov switching regular vine copulas. These account for asymmetric dependencies and tail dependencies in high dimensional data. We develop methods for fast maximum likelihood as well as Bayesian inference. Our algo- rithms are validated in simulations and applied to financial data. We...     »