In this thesis we deal with different topics in financial mathematics, that are all related to market imperfections and to the fundamental technique of utility maximization. The work consists of three parts. In the first one, which is based on two papers, we consider the problem of optimal...

In this paper we deal with a utility maximization problem at finite horizon on a continuous-time market with conical (and time varying) constraints (particularly suited to model a currency market with proportional transaction costs). In particular, we extend the results in Campi and Owen (2011)...

La gestion alternative connaît actuellement un engouement certain, tant de la part des investisseurs que des gérants qui y voient une parade efficace à la volatilité des marchés financiers. Cet intérêt ne saurait cependant occulter les risques auxquels sont exposés les hedge funds. Cet...

Given the increasing importance of funds of hedge funds in the development of the hedge fund industry and the cost-intensive nature of multi-manager structures, investors are questioning whether FoHF add value to an extent that justifies the extra layer of fees induced by their activity. To...