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Local Estimation Of Dynamic Copula Models

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  • BEATRIZ V. M. MENDES

    (IM/COPPEAD Graduate School of Business, Federal University at Rio de Janeiro, Brazil)

  • EDUARDO F. L. DE MELO

    (Mathematics and Statistics Institute, State University of Rio de Janeiro, Brazil)

Abstract

It has been empirically verified that the strength of dependence in stock markets usually rises with volatility. In this paper we exploit this stylized fact combined with local maximum likelihood estimation of copula models to analyze the dynamic joint behavior of series of financial log returns. Explanatory variables based on the estimated GARCH volatilities are considered as potential regressors for explaining the dynamics in the copula parameters. The proposed model can assess and discriminate how much of the strength of dependence is due just to the time-varying volatility. The final local-parametric estimates may be used to compute risk measures, to simulate portfolio behavior, and so on. We illustrate our methods using two American indexes. Results indicate that volatility does affect the strength of dependence. The in-sample Value-at-Risk based on the dynamic model outperforms those based on the empirical estimates.

Suggested Citation

  • Beatriz V. M. Mendes & Eduardo F. L. De Melo, 2010. "Local Estimation Of Dynamic Copula Models," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 13(02), pages 241-258.
    • Handle: RePEc:wsi:ijtafx:v:13:y:2010:i:02:n:s0219024910005759
    DOI: 10.1142/S0219024910005759
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    References listed on IDEAS

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    1. Patton, Andrew J, 2001. "Modelling Time-Varying Exchange Rate Dependence Using the Conditional Copula," University of California at San Diego, Economics Working Paper Series qt01q7j1s2, Department of Economics, UC San Diego.
    2. Michael Rockinger & Eric Jondeau, 2001. "Conditional Dependency of Financial Series: An Application of Copulas," Working Papers hal-00601478, HAL.
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