Option pricing in exponential L\'evy models with transaction costs

Nicola Cantarutti, Jo\~ao Guerra, Manuel Guerra and Maria Grossinho (mrg@iseg.ulisboa.pt)

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Abstract: We present an approach for pricing European call options in presence of proportional transaction costs, when the stock price follows a general exponential L\'{e}vy process. The model is a generalization of the celebrated work of Davis, Panas and Zariphopoulou (1993), where the value of the option is defined as the utility indifference price. This approach requires the solution of two stochastic singular control problems in finite horizon, satisfying the same Hamilton-Jacobi-Bellman equation, with different terminal conditions. We introduce a general formulation for these portfolio selection problems, and then we focus on the special case in which the probability of default is ignored. We solve numerically the optimization problems using the Markov chain approximation method and show results for diffusion, Merton and Variance Gamma processes. Option prices are computed for both the writer and the buyer.

Date: 2016-11, Revised 2019-11
New Economics Papers: this item is included in nep-cfn and nep-cmp
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Published in Journal of Computational Finance, 23(5), 2020, 1-32

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