In imperfect capital markets, an entrepreneur has to invest substantial personal funds to start a private firm and is forced to bear large firm-specific risk. Furthermore, if the entrepreneur is risk averse, one would expect the private equity to earn a premium for idiosyncratic risk. In this...

Testing portfolio alpha against a linear factor model can be interpreted as a mean-variance efficiency test of the optimal portfolio of factors. For ambiguity neutral investor, adding active portfolio with statistically significant alpha always implies efficiency gain relative to the optimal...

We consider a linear factor APT model and assume that agents are ambiguity averse with respect to payoffs of arbitrage portfolios. In contrast to the standard result, pricing errors need not converge to zero in the limit as the number of assets goes to infinity. Even in the case of exact factor...

Actively managed mutual funds have distinct return distributions from their passive benchmarks and our theoretical analysis using tail-sensitive risk preferences suggests that active value and growth funds may serve to reduce downside risk and capture upside potential, respectively. Furthermore,...

We study whether analysts' recommendations and the market's reactions to recommendation changes are influenced by the structure of analysts' research portfolios. We find that analysts maintain more positive recommendations for stocks that belong to the “core industry” in their research...