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Title: Abnormal tone and abnormal returns: An event study analysis Authors:  David Ardia - University of Neuchatel (Switzerland) [presenting]
Keven Bluteau - Institute of Financial Analysis, University of Neuchatel (Switzerland)
Kris Boudt - Vrije Universiteit Brussel and VU Amsterdam (Belgium)
Abstract: The Cumulative Abnormal Tone (CAT) framework is proposed for tracking the normal and abnormal dynamics of textual tone around events. In this framework, we use text-mining techniques to derive the normal tone based on market and sector-wide news. We then focus on corporate events and track the abnormal tone dynamics around that event. This leads to a cumulative abnormal tone chart. We apply the CAT framework to the analysis of cumulative abnormal returns across earnings press releases. We find that the analysis of firm's abnormal tone provides investors with relevant predictive information on the firms stock performance.