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Studying the Validity of the Efficient Market Hypothesis (EMH) in the Egyptian Exchange (EGX) after the 25th of January Revolution

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  • Kamal, Mona

Abstract

There is no doubt that the close of the Egyptian Exchange (EGX) during the period 28/1- 22/3/2011 in the wake of 25th of January Revolution has a consequence on the efficiency of the stock market. This paper assesses the 'close-open-effect' on the main price indices. The results indicate the absence of unit roots in the main price indices before and after the revolution. This implies the rejection of weak-form efficiency. The estimation of the (EGARCH model) reflects information asymmetry after the revolution with bad news affecting the investors’ expectations more rapidly. In addition, a negative and significant 'close-open-effect' on the returns of the main price index is evident in the results.

Suggested Citation

  • Kamal, Mona, 2014. "Studying the Validity of the Efficient Market Hypothesis (EMH) in the Egyptian Exchange (EGX) after the 25th of January Revolution," MPRA Paper 54708, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:54708
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    References listed on IDEAS

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    Cited by:

    1. Batiston Marques, Thales & Seixas dos Santos, Nelson, 2016. "Do Political News Affect Financial Market Returns? Evidences from Brazil," MPRA Paper 75530, University Library of Munich, Germany.
    2. Charilaos Mertzanis & Noha Allam, 2018. "Political Instability and Herding Behaviour: Evidence from Egypt’s Stock Market," Journal of Emerging Market Finance, Institute for Financial Management and Research, vol. 17(1), pages 29-59, April.

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    More about this item

    Keywords

    The Egyptian Exchange (EGX); the Efficient Market Hypothesis (EMH).;

    JEL classification:

    • G1 - Financial Economics - - General Financial Markets
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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