Capital Asset Prices with Heterogeneous Beliefs
AbstractWe show that in a market with an infinite number of assets and investors with unbiased heterogeneous beliefs, asset prices are identical to pricing in the capital asset pricing model, even if prices reveal no information. This result holds despite the fact that in the heterogeneous market the separation theorem does not hold, and investors hold different portfolios, which are generally located below the capital market line. When the number of assets is finite, prices deviate systematically from the CAPM prices. However, we show via simulations that in a finite but reasonably large market the CAPM pricing and risk-return relationship holds almost perfectly.
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Bibliographic InfoArticle provided by University of Chicago Press in its journal Journal of Business.
Volume (Year): 79 (2006)
Issue (Month): 3 (May)
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Web page: http://www.journals.uchicago.edu/JB/
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- Elyès Jouini & Clotilde Napp, 2010.
"Unbiased Disagreement in financial markets, waves of pessimism and the risk return tradeoff,"
- 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.
- He, Xue-Zhong & Shi, Lei, 2012. "Disagreement, correlation and asset prices," Economics Letters, Elsevier, vol. 116(3), pages 512-515.
- Jouini, Elyès & Napp, Clotilde, 2009. "Unbiased Disagreement and the Efficient Market Hypothesis," Economics Papers from University Paris Dauphine 123456789/3495, Paris Dauphine University.
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