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Featured researches published by Michael Kaestner.


Applied Financial Economics | 2011

Hedge fund activism: insights from a French clinical study

Véronique Bessière; Michael Kaestner; Anne-Laurence Lafont

Over the period from October 2006 to May 2008, Atos Origin, a French information technology company, was the target of two activist hedge funds, Centaurus and Pardus. This article investigates in detail how the activists initiated their actions, how the management organized its defence and how both were received by the market. The analysis reveals that, although Atos seemed to be an attractive opportunity, the funds failed in their primary objective, the sale of the target. In fact, the chairmen of Atos succeeded in discrediting the two hedge funds by getting support in the French context, not particularly prone to and sometimes even hostile towards shareholders interests. Our findings show that the success/failure classification used in large-sample studies, and based very often on officially stated goals, bears a considerable risk of misinterpretation. The Atos case shows that empirical studies should more heavily rely on what really matters for hedge fund activism, i.e. the sale of the target, spin-offs or cash-outs. While governance related motives are often mentioned and easily enforced, they do not make activism profitable and cannot, by themselves, be considered as primary motives for hedge fund activism. As a consequence, the success of hedge fund activism should be assessed considering primary motives only.


Accepted Papers Series | 2006

Investors' Misreaction to Unexpected Earnings: Evidence of Simultaneous Overreaction and Underreaction

Michael Kaestner


The Finance | 2006

Anomalous Price Behavior Following Earnings Surprises: Does Representativeness Cause Overreaction?

Michael Kaestner


The Finance | 2005

Previsions de resultat et reactions : ´etude de deux sous-reactions sous l'angle du biais d'ancrage

Michael Kaestner


Archive | 2009

Hedge Fund Activism: Does it Still Work? The Case of Atos Origin.

Véronique Bessière; Michael Kaestner; Anne-Laurence Lafont


Archive | 2010

Hedge Fund Activism: A Clinical Study of the French Company Atos Origin

Véronique Bessière; Anne-Laurence Lafont; Michael Kaestner


Archive | 2006

Overreaction and Underreaction in Analysts' Forecasts: A Pre- Versus Post-Crash Investigation

Véronique Bessière; Michael Kaestner


Archive | 2005

Sur- et sous-ractions des analystes financiers : une tude des volutions post-krach

Véronique Bessière; Michael Kaestner


Archive | 2005

To Buy or Not to Buy UMTS Licenses? A Real Options Approach

Véronique Bessière; Michael Kaestner


Archive | 2005

La précision des prévisions de bénéfices dans le cas des entreprises high-tech : une étude exploratoire des évolutions post-krach

Véronique Bessière; Michael Kaestner

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