Optimal portfolio selection under vanishing fixed transaction costs

S\"oren Christensen, Albrecht Irle and Andreas Ludwig

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Abstract: In this paper, asymptotic results in a long-term growth rate portfolio optimization model under both fixed and proportional transaction costs are obtained. More precisely, the convergence of the model when the fixed costs tend to zero is investigated. A suitable limit model with purely proportional costs is introduced and an optimal strategy is shown to consist of keeping the risky fraction process in a unique interval $[A,B]\subseteq\,]0,1[$ with minimal effort. Furthermore, the convergence of optimal boundaries, asymptotic growth rates, and optimal risky fraction processes is rigorously proved. The results are based on an in-depth analysis of the convergence of the solutions to the corresponding HJB-equations.

Date: 2016-11, Revised 2017-07
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Citations: View citations in EconPapers (2)

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