In these lecture notes we review through simple examples recent results on models for insider trading based on the theory of enlargement of filtrations and on anticipating calculus. In particular, we concentrate on the case of strong type of insiders. That is, insiders that have additional information in the a.s. sense. We explain how to treat the utility maximization problem for insiders in order to obtain models where the utility is finite. In the anticipating framework, we introduce models where the signal of the insider can not be revealed to the small trader even though the insider has an effect on the price (large trader effect).
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Kohatsu-Higa, A. (2007). Models for Insider Trading with Finite Utility. In: Paris-Princeton Lectures on Mathematical Finance 2004. Lecture Notes in Mathematics, vol 1919. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73327-0_3
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