This paper proposes a new method to introduce coherent risk measures for risks with infinite expectation, such as those characterized by some Pareto distributions. Extensions of the conditional value at risk, the weighted conditional value at risk and other examples are given. Actuarial...

Different momentum investors use different time horizons, or formation periods, to evaluate prior stock performance. We show that this heterogeneity has important consequences on asset returns. We provide evidence that heightened trading pressure due to the concurrence of the heterogeneous...