Purpose -The purpose of this study is to investigate the weak-form efficiency of a set of 24 specially constructed African continent-wide stock markets indices and those of 8 individual African national stock markets indices.Design/methodology/approach -The study uses conventional variance-ratio tests in addition to tests based on ranks and signs to examine the weak-form efficiency of the index series used in the study.Findings -On average, we find that irrespective of the test employed, the returns of all the 24 African continent-wide indices examined in the study appear to be more normally distributed compared to the 8 individual national stock price indices examined. We report evidence of statistically significant weak-form informational efficiency in the African continent-wide stock indices over the individual national stock indices irrespective of the test statistic used.
Practical implications -The policy implication of this evidence is that African stockmarkets sector returns distributional properties may significantly be improved if the continental market operations can be harmonised and integrated. Economically, this can lead to more efficient allocation of capital and risk, which is expected to be a catalyst for economic growth.Originality/value -The study makes two major contributions to the extant literature.Firstly, since it is still unclear whether existing African stock markets can improve their informational efficiency by harmonising and integrating their current operations, this study fills this gap by providing tentative evidence. Secondly, we offer for the first time a comparative analysis of the informational efficiencies of a sample of national stock indices as against African continent-wide constructed stock price indices.