Comparing Univariate and Multivariate Models to Forecast Portfolio Value-at-Risk

Andre Santos (), Francisco J. Nogales and Esther Ruiz ()

Journal of Financial Econometrics, 2013, vol. 11, issue 2, 400-441

Abstract: This article compares multivariate and univariate Generalized Autoregressive Conditional Heteroskedasticity (GARCH) models to forecast portfolio value-at-risk (VaR). We provide a comprehensive look at the problem by considering realistic models and diversified portfolios containing a large number of assets, using both simulated and real data. Moreover, we rank the models by implementing statistical tests of comparative predictive ability. We conclude that multivariate models outperform their univariate counterparts on an out-of-sample basis. In particular, among the models considered in this article, the dynamic conditional correlation model with Student's t errors seems to be the most appropriate specification when implemented to estimate the VaR of the real portfolios analyzed. Copyright The Author, 2012. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

Date: 2013
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Working Paper: Comparing univariate and multivariate models to forecast portfolio value-at-risk (2009)
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