Abstract
This paper is on decision theoretical foundations for various types of VaR models, including VaR and conditional-VaR, as objective measures of downside risk for financial prospects. We establish the connections of the VaRs with the first- and the second-order stochastic dominance investment criterions, and the logical argument for the equivalence between the first-order stochastic dominance and the VaR, and the equivalence between the second-order stochastic dominance and the c*-VaR as a modification of the conditional-VaR. We also discuss the usefulness and limitation of the VaRs and propose several alternative risk measures that are associated with the weaker behaviour assumptions underlying the VaRs.
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