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Dynamic Indifference Valuation Via Convex Risk Measures

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  • Susanne Klöppel
  • Martin Schweizer

Abstract

The (subjective) indifference value of a payoff in an incomplete financial market is that monetary amount which leaves an agent indifferent between buying or not buying the payoff when she always optimally exploits her trading opportunities. We study these values over time when they are defined with respect to a dynamic monetary concave utility functional, that is, minus a dynamic convex risk measure. For that purpose, we prove some new results about families of conditional convex risk measures. We study the convolution of abstract conditional convex risk measures and show that it preserves the dynamic property of time‐consistency. Moreover, we construct a dynamic risk measure (or utility functional) associated to superreplication in a market with trading constraints and prove that it is time‐consistent. By combining these results, we deduce that the corresponding indifference valuation functional is again time‐consistent. As an auxiliary tool, we establish a variant of the representation theorem for conditional convex risk measures in terms of equivalent probability measures.

Suggested Citation

  • Susanne Klöppel & Martin Schweizer, 2007. "Dynamic Indifference Valuation Via Convex Risk Measures," Mathematical Finance, Wiley Blackwell, vol. 17(4), pages 599-627, October.
    • Handle: RePEc:bla:mathfi:v:17:y:2007:i:4:p:599-627
    DOI: 10.1111/j.1467-9965.2007.00317.x
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