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Incomplete Information, Heterogeneity, and Asset Pricing

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  • Tony Berrada

Abstract

We consider a pure exchange economy where the drift of aggregate consumption is unobservable. Agents with heterogeneous beliefs and preferences act competitively on financial and goods markets. We discuss how equilibrium market prices of risk differ across agents, and in particular we discuss the properties of the market price of risk under the physical (objective) probability measure. We propose a number of specifications of risk aversions and beliefs where the market price of risk is much higher, and the riskless rate of return lower, than in the equivalent full information economy (homogeneous and heterogeneous preferences) and thus can provide an(other) answer to the equity premium and risk-free rate puzzles. We also derive a representation of the equilibrium volatility and numerically assess the role of heterogeneity in beliefs. We show that a high level of stock volatility can be obtained with a low level of aggregate consumption volatility when beliefs are heterogeneous. Finally, we discuss how incomplete information may explain the apparent predictability in stock returns and show that in-sample predictability cannot be exploited by the agents, as it is in fact a result of their learning processes. Copyright 2006, Oxford University Press.

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Bibliographic Info

Article provided by Society for Financial Econometrics in its journal Journal of Financial Econometrics.

Volume (Year): 4 (2006)
Issue (Month): 1 ()
Pages: 136-160

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Handle: RePEc:oup:jfinec:v:4:y:2006:i:1:p:136-160

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Cited by:
  1. Bernard Dumas & Alexander Kurshev & Raman Uppal, 2009. "Equilibrium Portfolio Strategies in the Presence of Sentiment Risk and Excess Volatility," Journal of Finance, American Finance Association, vol. 64(2), pages 579-629, 04.
  2. Jouini, Elyès & Napp, Clotilde, 2009. "Unbiased Disagreement and the Efficient Market Hypothesis," Economics Papers from University Paris Dauphine 123456789/3495, Paris Dauphine University.
  3. Raman Uppal & Harjoat Bhamra, 2013. "Asset Prices with Heterogeneity in Preferences and Beliefs," 2013 Meeting Papers 1344, Society for Economic Dynamics.
  4. Elyès Jouini & Clotilde Napp, 2010. "Unbiased Disagreement in Financial Markets, Waves of Pessimism and the Risk-Return Trade-off," Review of Finance, European Finance Association, vol. 15(3), pages 575-601.
  5. Tony BERRADA & Julien HUGONNIER, 2008. "Incomplete information, idiosyncratic volatility and stock returns," Swiss Finance Institute Research Paper Series 08-23, Swiss Finance Institute.
  6. Elyès Jouini & Jean-Michel Marin & Clotilde Napp, 2010. "Discounting and Divergence of Opinion," Post-Print halshs-00176636, HAL.

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