This exploratory paper is among the first to examine the impact of stock exchange mergers on informational market efficiency. We focus on the merger of Bolsa de Valores de Lisboa e Porto (Portuguese Stock Exchange) with Euronext in 2002 (that created Euronext Lisbon). To investigate this...

We test the information efficiency of the market for SO2 permits in the US. In order to do so, we perform a number of unit root tests and test if the changes in the SO2 permit price are serially correlated. Furthermore, we test if it would have been possible to earn a profit based on knowledge...

This paper tests for random walks and weak-form market efficiency in European equity markets. Daily returns for sixteen developed markets (Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United...

This note examines the weak-form market efficiency of Latin American equity markets. Daily returns for Argentina, Brazil, Chile, Colombia, Mexico, Peru and Venezuela are examined for random walks using serial correlation coefficient and runs tests, Augmented Dickey-Fuller (ADF), Phillips-Perron...

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...

Market efficiency has always been the concern of market regulators, investors, and researchers. Market efficiency tests showed different and mixed evidences in the developing markets. The present study deals with the testing of weak form of efficiency and the efficient market hypothesis on...