Minimax Asset Price Bounds in Incomplete Markets

This paper develops an approach to tighten the bounds on asset pricing in an incomplete market that combines no-arbitrage pricing and preference-based pricing, and the approach is applied to call options without dynamic rebalancing. With the no-arbitrage pricing, it is straightforward to obtain the initial bounds, which are too wide to be of practical uses. By accepting that investors exhibit risk aversion from benchmark pricing kernels, it is possible to narrow the bounds considerably. Using the minimax deviation implicit in the parameters, one can restrict further the set of plausible values for call options on a stock. JEL Classification: G12; D5