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Testing the Weak-form Market Efficiency and the Day of the Week Effects of some African Countries


  • Michael Batuo Enowbi
  • Francesco Guidi
  • Kupukile Mlambo

    () (African Development Bank)


The aims of this work are twofold. On the one hand, it aims to find evidence supporting the presence of the weak form efficiency of several emerging African stock markets by using both parametric as well as non parametric tests. The results indicate that none of the markets are characterised by random walks with the exception of the South African stock market. On the other hand, this study aims to detect the presence of the day of the week effects of these African stock markets. Results show the existence of day of the week effects, that is, the typical negative Monday and Friday positive effects in several stock markets.

Suggested Citation

  • Michael Batuo Enowbi & Francesco Guidi & Kupukile Mlambo, 2010. "Testing the Weak-form Market Efficiency and the Day of the Week Effects of some African Countries," The African Finance Journal, Africagrowth Institute, vol. 12(Conferenc), pages 1-26.
  • Handle: RePEc:afj:journl:v:12:y:2010:i:conference:p:1-26

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    References listed on IDEAS

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    Cited by:

    1. Dumitriu, Ramona & Stefanescu, Razvan, 2013. "DOW effects in returns and in volatility of stock markets during quiet and turbulent times," MPRA Paper 47218, University Library of Munich, Germany, revised 02 Apr 2013.

    More about this item


    African stock markets; random walk hypothesis; day of the week effects;

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets


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