Before revision:  In particular, we compute the buyer 's price of such derivatives for an agent investing in the forward market , whose preferences are described by an exponential utility function. Such a price is characterized in terms of continuous viscosity solutions of suitable non-linear PDEs.
After revision:  In particular, we compute the buyer 's price of such derivatives for an agent investing in the forward market in order to hedge the risk of his position. We fully characterize the buyer's utility indifference price of a given product in terms of continuous viscosity solutions of suitable non-linear PDEs.