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 study, we test the size and the book to market effects in explaining stock returns with co-skewness and co-kurtosis on the French Stock Market over July 1976 to June 2001 period. Results of time series regressions of monthly portfolio returns are consistent with the Fama and French...

An essential element of any realistic investment portfolio selection is the consideration of transaction costs. Our purpose, in this paper, is to determine the maximum return and the corresponding number of securities to buy giving such return, whenever practical constraints features related to...

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)...

In this study, we test the size and the book to market effects in explaining stock returns with co-skewness and co-kurtosis on the French Stock Market over July 1976 to June 2001 period. Results of time series regressions of monthly portfolio returns are consistent with the Fama and French...

In this study, we test the three factor model of Fama and French and the Characteristic Model of Daniel and Titman (1997) on The French Stock Market over July 1976 to June 2001 period. Stocks are ranked by size and book to market ratios and then by ex-ante HML, SMB or Mkt loadings. The...