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Are African Stock Markets Inefficient? New Evidence on Seasonal Anomalies

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  • Júlio Lobão

Abstract

It is widely acknowledged that having efficient financial markets is paramount in the allocation of social resources to their most productive uses. This paper explores the informational efficiency of six of the most important African stock markets for indication of seasonal predictability in stock returns. The results reveal that all markets exhibited some kind of seasonal patterns. The prevalence of the phenomenon was higher in the Egyptian and Tunisian markets, suggesting the presence of inefficient prices. Surprisingly, the only advanced emerging market of the sample (South Africa) showed a relatively large number of anomalies. This paper also reports the existence of strong pre-holiday effects and turn-of-the-month effects in most of the markets under scrutiny. Moreover, this study is the first to document the presence of quarterly effects in African markets. Collectively, the evidence obtained highlights the opportunity for arbitrageurs to reap profits as well as the need of decision-makers to implement legal and regulatory reforms in the markets of the continent. JEL Codes - G11; G14; G15

Suggested Citation

  • Júlio Lobão, 2018. "Are African Stock Markets Inefficient? New Evidence on Seasonal Anomalies," Scientific Annals of Economics and Business (continues Analele Stiintifice), Alexandru Ioan Cuza University, Faculty of Economics and Business Administration, vol. 65(3), pages 283-301, September.
    • Handle: RePEc:aic:saebjn:v:65:y:2018:i:3:p:283-301:n:117
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    References listed on IDEAS

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    More about this item

    Keywords

    Africa; market efficiency; stock markets; seasonal anomalies;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • 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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