Stock Exchange Mergers and Market

Abstract : The aim of this article is to examine the impact of stock exchange mergers on the degree of informational efficiency. For this purpose, we apply the generalized spectral shape test for the martingale difference hypothesis to the stock returns before and after the 31 domestic and crossborder mergers completed from 1997 to 2011. The test is conducted with moving subsample windows, allowing us to detect the periods of (in)efficiency, and thus to conduct a comparative analysis for pre-merger and post-merger periods. We find that higher levels of efficiency are less frequent than lower levels of efficiency after a stock exchange merger. We also find that the impact on the level of efficiency depends on a range of merger characteristics such as the level of development, size, geographical diversification and industrial diversification of stock exchange
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Applied Economics, Taylor & Francis (Routledge), 2016, 48 (7), pp.576-589. 〈10.1080/00036846.2015.1083090〉
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Amélie Charles, Olivier Darné, Jae H. Kim, Etienne Redor. Stock Exchange Mergers and Market. Applied Economics, Taylor & Francis (Routledge), 2016, 48 (7), pp.576-589. 〈10.1080/00036846.2015.1083090〉. 〈hal-01238707〉

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