This study empirically re-examines the weak form efficient markets hypothesis of the Ghana Stock Market using a new robust non-parametric variance-ratios test in addition to its parametric alternative. The main finding is that stock returns are conclusively not efficient in the weak form,...

Purpose – The purpose of this paper is to investigate and compare the weak‐form efficiency of a set of 24 African continent‐wide stock price indices and those of eight individual African national stock price indices. Design/methodology/approach – Variance‐ratio tests based on ranks and...

Purpose – The purpose of this paper is to investigate and compare the weak-form efficiency of a set of 24 African continent-wide stock price indices and those of eight individual African national stock price indices. Design/methodology/approach – Variance-ratio tests based on ranks and signs...

This paper investigates the relationship between director shareownership and corporate performance in South Africa using a sample of 169 listed firms from 2002 to 2007. Our results suggest a statistically significant and positive association between director shareownership and corporate...