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Optimal consumption policies in illiquid markets
Alessandra Cretarola 1, Fausto Gozzi 1, Huyên Pham 2, 3, Peter Tankov 2
(02/07/2008)

We investigate optimal consumption policies in the liquidity risk model introduced in Pham and Tankov (2007). Our main result is to derive smoothness results for the value functions of the portfolio/consumption choice problem. As an important consequence, we can prove the existence of the optimal control (portfolio/consumption strategy) which we characterize both in feedback form in terms of the derivatives of the value functions and as the solution of a second-order ODE. Finally, numerical illustrations of the behavior of optimal consumption strategies between two trading dates are given.
1 :  Dipartimento di Scienze Economiche e Aziendali
Libera Università INTERNAZIONALE DEGLI STUDI SOCIALI G. CARLI
2 :  Laboratoire de Probabilités et Modèles Aléatoires (LPMA)
CNRS : UMR7599 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot
3 :  Centre de Recherche en Économie et Statistique (CREST)
INSEE – École Nationale de la Statistique et de l'Administration Économique
Mathématiques/Probabilités

Sciences de l'Homme et Société/Economies et finances
Illiquid market – optimal consumption – integrodifferential equations – viscosity solutions – semiconcavity – sub(super) differentials – optimal control
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