This paper deals with an investment–consumption portfolio problem when the current utility depends also on the wealth process. Such problems arise e.g. in portfolio optimization with random horizon or random trading times. To overcome the difficulties of the problem, a dual approach is employed: a dual control problem is defined and treated by means of dynamic programming, showing that the viscosity solutions of the associated Hamilton–Jacobi–Bellman equation belong to a suitable class of smooth functions. This allows defining a smooth solution of the primal Hamilton–Jacobi–Bellman equation, and proving by verification that such a solution is indeed unique in a suitable class of smooth functions and coincides with the value function of the primal problem. Applications to specific financial problems are given.

Federico S., Gassiat P., Gozzi F. (2015). Utility maximization with current utility on the wealth: regularity of solutions to the HJB equation. FINANCE AND STOCHASTICS, 19(2), 415-448 [10.1007/s00780-015-0257-z].

Utility maximization with current utility on the wealth: regularity of solutions to the HJB equation

Federico S.
;
2015

Abstract

This paper deals with an investment–consumption portfolio problem when the current utility depends also on the wealth process. Such problems arise e.g. in portfolio optimization with random horizon or random trading times. To overcome the difficulties of the problem, a dual approach is employed: a dual control problem is defined and treated by means of dynamic programming, showing that the viscosity solutions of the associated Hamilton–Jacobi–Bellman equation belong to a suitable class of smooth functions. This allows defining a smooth solution of the primal Hamilton–Jacobi–Bellman equation, and proving by verification that such a solution is indeed unique in a suitable class of smooth functions and coincides with the value function of the primal problem. Applications to specific financial problems are given.
2015
Federico S., Gassiat P., Gozzi F. (2015). Utility maximization with current utility on the wealth: regularity of solutions to the HJB equation. FINANCE AND STOCHASTICS, 19(2), 415-448 [10.1007/s00780-015-0257-z].
Federico S.; Gassiat P.; Gozzi F.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/944383
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