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Rational Inattention and Portfolio Selection

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Author Info
LIXIN HUANG
HONG LIU

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Abstract

Costly information acquisition makes it rational for investors to obtain important economic news with only limited frequency or limited accuracy. We show that this rational inattention to important news may make investors over- or underinvest. In addition, the optimal trading strategy is "myopic" with respect to future news frequency and accuracy. We find that the optimal news frequency is nonmonotonic in news accuracy and investment horizon. Furthermore, when both news frequency and news accuracy are endogenized, an investor with a higher risk aversion or a longer investment horizon chooses less frequent but more accurate periodic news updates. Copyright 2007 by The American Finance Association.

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File URL: http://www.blackwell-synergy.com/doi/abs/10.1111/j.1540-6261.2007.01263.x
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Publisher Info
Article provided by American Finance Association in its journal The Journal of Finance.

Volume (Year): 62 (2007)
Issue (Month): 4 (08)
Pages: 1999-2040
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Handle: RePEc:bla:jfinan:v:62:y:2007:i:4:p:1999-2040

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  1. Basak, Suleyman & Chabakauri, Georgy, 2009. "Dynamic Mean-Variance Asset Allocation," CEPR Discussion Papers 7256, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
  2. Wang, Honglin & Reardon, Thomas, 2008. "Social Learning and Parameter Uncertainty in Irreversible Investment----Evidence from Greenhouse Adoption in Northern China," 2008 Annual Meeting, July 27-29, 2008, Orlando, Florida 6310, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association). [Downloadable!]
  3. Yulei Luo, 2006. "Rational Inattention, Portfolio Choice, and the Equity Premium," Computing in Economics and Finance 2006 56, Society for Computational Economics. [Downloadable!]
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This page was last updated on 2009-12-8.

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