The hypothesis that a stock market price index follows a random walk is tested for the regional stock market of the West African Economic and Monetary Union called the Bourse R¨¦gionale des Valeurs Mobili¨¨res (BRVM) using the Lo and MacKinlay (1988), the Chow and Denning (1993), and the...

Multiple variance ratio tests, in rolling window procedure, were applied to weekly data (expressed in local and US dollar currencies) for five stock markets in the Middle East and North Africa during 1995-2009. Results indicated that the big and liquid stock markets of Israel and Turkey are...

Informational efficiency of capital markets has been the subject of numerous empirical studies. Intensive research of the field is justified by the important implications of the knowledge of the of informational efficiency level in the financial practice. Empirical studies that have tested the...

This paper examines the weak-form efficient markets hypothesis for the Nigerian stock market by testing for random walks in the monthly index returns over the period 1984-2009. The results of the non-parametric runs test show that index returns on the Nigerian Stock Exchange (NSE) display a...