Insider trading activities and returns of German blue chips

Authors

LINNERTOVÁ Dagmar DEEV Oleg

Year of publication 2015
Type Article in Periodical
Magazine / Source Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
MU Faculty or unit

Faculty of Economics and Administration

Citation
Doi http://dx.doi.org/10.11118/actaun201563061995
Field Management and administrative
Keywords insider trading; panel Granger causality; DAX; market manipulation
Attached files
Description The aim of this paper is to investigate the causality between stock returns and insider open market transactions. The Dumitrescu-Hurlin (2012) heterogeneous approach to panel Granger causality is chosen to examine the relationship. The investigation is conducted on the 30 most traded German blue chips during the period of 2006-2014. The strong causality is revealed in the one-month period. Thus, stock returns may be used to predict future insider trading activity. The strong causality between stock returns and future insider buying and selling transactions is further confirmed with three out of four employed insider trading indices. The fact of the legal insider trade (either buy or sell) is more important than its volume. The reverse relationship is weak and valid only for longer time horizon of twelve months. Our results indicate that insider traders do not degrade the market efficiency in the long run.
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