Detecting regime switches in the dependence structure of high dimensional financial data

Details Detecting regime switches in the dependence structure of high dimensional financial data Detecting regime switches in the dependence structure of high dimensional financial data

2012-02-09

arxiv.org/abs/1202.2009v1

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Misperceptions about extreme dependencies between different financial assets have been an im- portant element of the recent financial crisis. This paper studies inhomogeneity in dependence structures using Markov switching regular vine copulas. These account for asymmetric depen- dencies and tail dependencies in high dimensional data. We develop methods for fast maximum likelihood as well as Bayesian inference. Our algorithms 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.

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