The unification of the colombian stock market: A step towards efficiency–empirical evidence

Abstract

The empirical evidence presented in this study shows that there has certainly been a structural change in the Colombian stock market since the merger of the three regional Exchanges (Bolsas) into the Colombian Stock Exchange (Bolsa de Valores de Colombia). This change has been reflected in a greater level of efficiency in that market. Regarding individual assets, the findings coincide with Samuelson (1998) in the sense that the stock market is micro-efficient but macro-inefficient, which means that the efficient market hypothesis performs better for individual stocks than for the aggregated price indexes of the market. © 2004 Taylor & Francis Group, LLC. All Rights Reserved.