Ambiguity in Asset Markets: Theory and Experiment
This paper studies the impact of ambiguity and ambiguity aversion on equilibrium asset prices and portfolio holdings in competitive financial markets. It argues that attitudes toward ambiguity are heterogeneous across the population, just as attitudes toward risk are heterogeneous across the population, but that heterogeneity of attitudes toward ambiguity has different implications than heterogeneity of attitudes toward risk. In pa rticular, when some state probabilities are not known, agents who are sufficiently ambiguity averse find open sets of prices for which they refuse to hold an ambiguous portfolio. This suggests a different cross section of portfolio choices, a wider range of state price/probability ratios, and different rankings of state price/probability ratios than would be predicted if state probabilities were known. Experiments confirm all of these suggestions. Our findings contradict the claim that investors who have cognitive biases do not affect prices because they are inframarginal: ambiguity-averse investors have an indirect effect on prices because they change the per capita amount of risk that is to be shared among the marginal investors. Our experimental data also suggest a positive correlation between risk aversion and ambiguity aversion that might explain the "value effect" in historical data. The Author 2010 Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For Permissions, please e-mail: email@example.com., Oxford University Press.
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Volume (Year): 23 (2010)
Issue (Month): 4 (April)
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- Epstein, Larry G & Wang, Tan, 1994. "Intertemporal Asset Pricing Under Knightian Uncertainty," Econometrica, Econometric Society, vol. 62(2), pages 283-322, March.
- Uri Gneezy & Arie Kapteyn & Jan Potters, 2003.
"Evaluation Periods and Asset Prices in a Market Experiment,"
Journal of Finance,
American Finance Association, vol. 58(2), pages 821-838, 04.
- Gneezy, U. & Kapteyn, A. & Potters, J.J.M., 2002. "Evaluation Periods and Asset Prices in a Market Experiment," Discussion Paper 2002-8, Tilburg University, Center for Economic Research.
- Uri Gneezy & Arie Kapteyn & Jan Potters, 2002. "Evaluation Periods and Assett Prices in a Market Experiment," Working Papers 02-02, RAND Corporation Publications Department.
- Larry G. Epstein & JianJun Miao, 2001.
"A Two-Person Dynamic Equilibrium under Ambiguity,"
RCER Working Papers
478, University of Rochester - Center for Economic Research (RCER).
- Ghirardato, Paolo & Maccheroni, Fabio & Marinacci, Massimo, 2004. "Differentiating ambiguity and ambiguity attitude," Journal of Economic Theory, Elsevier, vol. 118(2), pages 133-173, October.
- Peter Bossaerts & Charles Plott & William R. Zame, 2006.
"Prices and Portfolio Choices in Financial Markets: Theory and Experiment,"
122247000000001322, UCLA Department of Economics.
- Peter Bossaerts & Charles Plott & William R. Zame, 2005. "Prices and Portfolio Choices in Financial Markets: Theory and Experiments," UCLA Economics Working Papers 840, UCLA Department of Economics.
- Rose-Anne Dana, 2004. "Ambiguity, uncertainty aversion and equilibrium welfare," Economic Theory, Springer, vol. 23(3), pages 569-587, March.
- Raman Uppal & Tan Wang, 2003.
"Model Misspecification and Underdiversification,"
Journal of Finance,
American Finance Association, vol. 58(6), pages 2465-2486, December.
- Gilboa, Itzhak & Schmeidler, David, 1989.
"Maxmin expected utility with non-unique prior,"
Journal of Mathematical Economics,
Elsevier, vol. 18(2), pages 141-153, April.
- Peter Bossaerts & Charles Plott, 2004.
"Basic Principles of Asset Pricing Theory: Evidence from Large-Scale Experimental Financial Markets,"
Review of Finance,
Springer, vol. 8(2), pages 135-169.
- Bossaerts, Peter & Plott, Charles R., 2000. "Basic Principles of Asset Pricing Theory: Evidence From Large-Scale Experimental Financial Markets," Working Papers 1070, California Institute of Technology, Division of the Humanities and Social Sciences.
- Bossaerts, Peter & Plott, Charles, 2000. "Basic Principles Of Asset Pricing Theory: Evidence From Large-Scale Experimental Financial Markets," CEPR Discussion Papers 2578, C.E.P.R. Discussion Papers.
- Dana, Rose-Anne, 2004. "Ambiguity, uncertainty aversion and equilibrium welfare," Economics Papers from University Paris Dauphine 123456789/5393, Paris Dauphine University.
- Fama, Eugene F & French, Kenneth R, 1992. " The Cross-Section of Expected Stock Returns," Journal of Finance, American Finance Association, vol. 47(2), pages 427-65, June.
- Marco Cagetti & Lars Peter Hansen & Thomas Sargent & Noah Williams, 2002. "Robustness and Pricing with Uncertain Growth," Review of Financial Studies, Society for Financial Studies, vol. 15(2), pages 363-404, March.
- Brian D. Kluger & Steve B. Wyatt, 2004. "Are Judgment Errors Reflected in Market Prices and Allocations? Experimental Evidence Based on the Monty Hall Problem," Journal of Finance, American Finance Association, vol. 59(3), pages 969-998, 06.
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