This paper examines competing explanations, based on risk and investor sentiment, for the cross-sectional returns in the Tunisian stock market. First, we examine the explanatory power of Fama and French (1993); and Carhart (1997) risk factors in the cross-section of stock returns. We find...

This paper develops a model of heterogeneous agents on an options market. On Paris Option Market, negotiators have different beliefs about future-at the volatility of the underlying. We assume in advance two groups; fundamentalists who believe in mean reversion and Chartists that incorporate...