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Semiparametric Dynamic Portfolio Choice with Multiple Conditioning Variables

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JournalJournal of Econometrics
DateAccepted/In press - 16 Sep 2015
DateE-pub ahead of print - 1 Jun 2016
DatePublished (current) - 1 Oct 2016
Issue number2
Volume194
Pages (from-to)309-318
Early online date1/06/16
Original languageEnglish

Abstract

Dynamic portfolio choice has been a central and essential objective for investors in active asset management. In this paper, we study the dynamic portfolio choice with multiple conditioning variables, where the dimension of the conditioning variables can be either fixed or diverging to infinity at certain polynomial rate of the sample size. We propose a novel data-driven method to estimate the optimal portfolio choice, motivated by the model averaging marginal regression approach suggested by Li, Linton and Lu (2015). More specifically, in order to avoid the curse of dimensionality associated with the multivariate nonparametric regression problem and to make it practically implementable, we first estimate the marginal optimal portfolio choice by maximising the conditional utility function for each univariate conditioning variable, and then construct the joint dynamic optimal portfolio through the weighted average of the marginal optimal portfolio across all the conditioning variables. Under some regularity conditions, we establish the large sample properties for the developed portfolio choice procedure. Both the simulation study and empirical application well demonstrate the finite-sample performance of the proposed methodology.

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