Testing equity market efficiency around terrorist attacks
AbstractThis article uses the nine major bombings since 1998 that have been attributed to Al Qaida to examine market efficiency, including a test of rumours that investors traded with advance knowledge of attacks. Analysis of these related, but individually unexpected, events confirms markets are semi-strong efficient: it now takes well under a trading day to fully price in a completely unexpected attack. On balance, markets also proved strongly efficient with no conclusive evidence of insider trading.
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Bibliographic InfoArticle provided by Taylor & Francis Journals in its journal Applied Economics.
Volume (Year): 44 (2012)
Issue (Month): 31 (November)
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