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Conditional Volatility Of Most Active Shares Of Casablanca Stock Exchange

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  • Abdelhamid El Bouhadi

    (Cadi Ayyad of Marrakech University)

Abstract

Volatility plays an important role in the explanation of prices of securities and their derivatives as well as risk which are relative to them. The stock exchange of Casablanca constitutes a market meadow emergent of MEA zone for which the problem of volatility should not be underestimated for the causes of lack of the making in the order book. The introduction of the electronic system in 1998 allowed continuous quotation of a number restricted by securities liquidity of which does not seem even so important. We test in this paper the conditional volatility of a certain number of securities considered as active and which to be result from the MADEX index. Results show a certain asymmetric volatility of the major securities. The use of the asymmetric GARCH allowed us better to describe rough variations of prices provoked by large quantities traded in block market. These models throw back quadratic specification of the conditional variance lauded by GARCH standard models. Indeed, with regard to these last ones, exponential model GARCH and threshold GARCH have two advantages. While standard model GARCH puts that only the amplitude of shock and not the sign of the past residuals has an impact on the conditional variance, EGARCH and TGARCH models allows an asymmetric answer to shocks. Second advantage is that not conditional variance is discrete.

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Bibliographic Info

Paper provided by EconWPA in its series Finance with number 0305007.

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Date of creation: 29 May 2003
Date of revision: 10 Oct 2003
Handle: RePEc:wpa:wuwpfi:0305007

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Web page: http://128.118.178.162

Related research

Keywords: Volatility ; Asymmetric GARCH ; none Linearity ; MADEX ; The stock exchange of Casablanca.;

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  1. Jean-Marie Dufour, 2001. "Logiques et tests d'hypothèses : réflexions sur les problèmes mal posés en économétrie," CIRANO Working Papers 2001s-40, CIRANO.
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  8. Dickey, David A & Fuller, Wayne A, 1981. "Likelihood Ratio Statistics for Autoregressive Time Series with a Unit Root," Econometrica, Econometric Society, vol. 49(4), pages 1057-72, June.
  9. Bekaert, Geert & Harvey, Campbell R. & Lundblad, Christian, 2001. "Emerging equity markets and economic development," Journal of Development Economics, Elsevier, vol. 66(2), pages 465-504, December.
  10. White, Halbert, 1980. "A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity," Econometrica, Econometric Society, vol. 48(4), pages 817-38, May.
  11. Dacorogna, Michael M. & Muller, Ulrich A. & Nagler, Robert J. & Olsen, Richard B. & Pictet, Olivier V., 1993. "A geographical model for the daily and weekly seasonal volatility in the foreign exchange market," Journal of International Money and Finance, Elsevier, vol. 12(4), pages 413-438, August.
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