Sharpe ratio has been widely used in the portfolio management industry as well as fund industry (Robertson, 2001; Scholz and Wilkens, 2005). Users often forget the main core assumption describing the appropriateness of such risk-adjusted performance measure, namely asset return normality. This...

The measurement problems encountered while trying to exhibit the influence of market risk factor on asset returns may be numerous. It seems then difficult to highlight the unique common latent factor underlying stock return evolutions in the market. So far, excess return relationships are mainly...