Multiplicative Conditional Correlation Models for Realized Covariance Matrices
Luc Bauwens (),
Manuela Braione and
Giuseppe Storti ()
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Manuela Braione: Université catholique de Louvain, CORE, Belgium
No 2016041, CORE Discussion Papers from Université catholique de Louvain, Center for Operations Research and Econometrics (CORE)
We introduce a class of multiplicative dynamic models for realized covariance matrices assumed to be conditionally Wishart distributed. The multiplicative structure enables consistent three-step estimation of the parameters, starting by covariance targeting of a scale matrix. The dynamics of conditional variances and correlations are inspired by specifications akin to the consistent dynamic conditional correlation model of the multivariate GARCH literature, and estimation is performed by quasi maximum likelihood. Simulations show that in finite samples the three-step estimator has smaller bias and root mean squared error than the full estimator when the cross-sectional dimension increases. An empirical application illustrates the flexibility of these models in a low-dimensional setting, and another one illustrates their e ectiveness and practical usefulness in high dimensional portfolio allocation strategies.
Keywords: Dynamic conditional correlations; Wishart distribution; Multiplicative models; Realized covariances (search for similar items in EconPapers)
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