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Diploma Thesis from the year 2007 in the subject Business economics - Business Management, Corporate Governance, grade: 1,7, University of Tubingen, language: English, abstract: Trading by corporate insiders1 in their company s stock and the impact of insider tradingon capital markets has long been a field of interest for academics as well as policymakers and regulators who aim to guarantee the effectiveness and fairness of capitalmarkets.2 Outside investors are following corporate insiders trading behavior closelyand might intend to mimic their trading strategies, trying to realize abnormal profits.Newspapers and information services regularly report insider trading activity.3 The terminsider trading will generally be used to describe trading by corporate insiders. It does,however, not necessarily imply illegal behavior. Corporate insiders might trade for amultitude of reasons which do not have to include the illegal exploitation of inside information.The definition of corporate insiders might differ from country to country andtheir corresponding regulations. The differences in the definition of corporate insidersbetween the US, the UK, and Germany will later be explained.The academia has provided a multitude of papers on insider trading over different decades(e.g., Jaffe (1974), Seyhun (1986), Rozeff and Zaman (1998), and Lakonishok andLee (2001)) and research has been conducted to analyze the effects of insider trading ondifferent countries capital markets (e.g., Jeng et al. (2003) for the US, Fidrmuc et al.(2006) for the UK, Eckbo and Smith (1998) for Norway, and Betzer and Theissen(2005) for Germany).The majority of research publications, however, excludes stock option exercises fromthe analysis. The reasons for the exclusion of stock options are versatile. Early paperson insider trading exclude the exercises due to the complexity of identifying reasons forthe exercise of stock options4 or the difficulty of getting price information associatedwith option exercises.5 Rozeff and Zaman (1998), Jeng et al. (2003), and Fidrmuc et al.(2006) do not give any specific reasons but exclude stock options from their sample as well. Other studies retain the sale of the shares in their sample when stock options areexercised and the acquired shares are sold immediately.6Nonetheless, a new strand of literature has emerged that specifically focuses on the exerciseof stock options by corporate insiders. Carpenter and Remmers (2001) pioneer inthis field with their research on inside information related to the decisions by corporateinsiders to exercise their stock options.