Asymptotic Power Utility-Based Pricing and Hedging

Details Asymptotic Power Utility-Based Pricing and Hedging Asymptotic Power Utility-Based Pricing and Hedging

2009-12-17

arxiv.org/abs/0912.3362v2

Economy

Quantitative Finance

Portfolio Management

31 pages, 3 figures. Examples added

Scientific paper

Kramkov and Sirbu (2006, 2007) have shown that first-order approximations of power utility-based prices and hedging strategies can be computed by solving a mean-variance hedging problem under a specific equivalent martingale measure and relative to a suitable numeraire. In order to avoid the introduction of an additional state variable necessitated by the change of numeraire, we propose an alternative representation in terms of the original numeraire. More specifically, we characterize the relevant quantities using semimartingale characteristics similarly as in Cerny and Kallsen (2007) for mean-variance hedging. These results are illustrated by applying them to exponential L\'evy processes and stochastic volatility models of Barndorff-Nielsen and Shephard type.

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