Demutualization of stock exchanges : A case study : London Stock Exchange and Hong Kong Stock Exchange

Sammanfattning: The focus of this study is to evaluate the impact of corporate ownership structure on the overall performance of stock exchanges. This study distinguishes in particular mutual versus demutualized ownership. London Stock Exchange and Hong Kong Stock Exchange are chosen as study cases, because London Stock Exchange is one of the world leading stock exchanges and Hong Kong Stock Exchange is definitely one of the most important emerging market stock exchanges. That is why the results obtained by comparing these two stock exchanges could serve as good indicator in understanding the effects of demutualization process on the whole stock exchange sector and retain the subtle differences in micro-behavior of the stock exchanges undergone the same transformation. In this paper the simple descriptive statistics is used as the method of analysis, in association to a profound review of the literature in this area. The data illuminate the fact that demutualized stock exchanges hold a stronger operating performance and a better performance in term of shareholder’s return than mutual exchanges. The result is generally in line with the basic theories in the area of corporate governance and empirical studies in this specific area like Aggarwal (2006), Mendiola and O’Hara (2003) and Hart and Moore (1996).