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Dynamic Consumption and Portfolio Choice with Stochastic Volatility in Incomplete Markets

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Author Info
George Chacko
Luis M. Viceira

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Abstract

This paper examines the optimal consumption and portfolio-choice problem of long-horizon investors who have access to a riskless asset with constant return and a risky asset ("stocks") with constant expected return and time-varying precision--the reciprocal of volatility. Markets are incomplete, and investors have recursive preferences defined over intermediate consumption. The paper obtains a solution to this problem which is exact for investors with unit elasticity of intertemporal substitution of consumption and approximate otherwise. The optimal portfolio demand for stocks includes an intertemporal hedging component that is negative when investors have coefficients of relative risk aversion larger than one, and the instantaneous correlation between volatility and stock returns is negative, as typically estimated from stock return data. Our estimates of the joint process for stock returns and precision (or volatility) using U.S. data confirm this finding. But we also find that stock return volatility does not appear to be variable and persistent enough to generate large intertemporal hedging demands. Copyright 2005, Oxford University Press.

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File URL: http://hdl.handle.net/10.1093/rfs/hhi035
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Article provided by Oxford University Press for Society for Financial Studies in its journal The Review of Financial Studies.

Volume (Year): 18 (2005)
Issue (Month): 4 ()
Pages: 1369-1402
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Handle: RePEc:oup:rfinst:v:18:y:2005:i:4:p:1369-1402

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