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Ambiguity Aversion and Underdiversification

Published online by Cambridge University Press:  01 November 2016

Massimo Guidolin  and
Hening Liu
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Abstract

We examine asset allocation decisions under smooth ambiguity aversion when an investor has a prior degree of belief in the domestic capital asset pricing model (CAPM). Different from a Bayesian approach, the investor separately relies on the conditional distribution of returns and on the posterior over parameters to make decisions, rather than on the predictive distribution of returns that integrates priors and likelihood information. We find that in the perspective of U.S. investors, ambiguity aversion generates strong home bias in equity holdings, regardless of beliefs in the CAPM or risk aversion. Results become stronger under regime-switching investment opportunities.

Type
Research Article
Information
Journal of Financial and Quantitative Analysis , Volume 51 , Issue 4 , August 2016 , pp. 1297 - 1323
Copyright
Copyright © Michael G. Foster School of Business, University of Washington 2016 

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References

Ahearne, A.; Griever, W.; and Warnock, F.. “Information Costs and Home Bias: An Analysis of U.S. Holdings of Foreign Equities.” Journal of International Economics, 62 (2004), 313–336.CrossRefGoogle Scholar
Ang, A., and Bekaert, G.. “International Asset Allocation with Regime Shifts.” Review of Financial Studies, 15 (2002), 1137–1187.CrossRefGoogle Scholar
Bekaert, G., and Wang, X.. “Home Bias Revisited.” Working Paper, Columbia University (2009).CrossRefGoogle Scholar
Brennan, M. J.; Cao, H. H.; Strong, N.; and Xu, X.. “The Dynamics of International Equity Market Expectations.” Journal of Financial Economics, 77 (2005), 257–288.CrossRefGoogle Scholar
Camerer, C. F.“Uncertain Decisions: Bridging Theory and Experiments.” In Ambiguity Aversion and Non-Additive Probability: Experimental Evidence, Models and Applications, Kluwer Academic Publishers (1999), 53–80.Google Scholar
Campanale, C.“Learning, Ambiguity and Life-Cycle Portfolio Allocation.” Review of Economic Dynamics, 14 (2011), 339–367.CrossRefGoogle Scholar
Carhart, M. M.“On Persistence in Mutual Fund Performance.” Journal of Finance, 52 (1997), 57–82.CrossRefGoogle Scholar
Chen, H.; Ju, N.; and Miao, J.. “Dynamic Asset Allocation with Ambiguous Return Predictability.” Review of Economic Dynamics, 17 (2014), 799–823.CrossRefGoogle Scholar
Chib, S.“Calculating Posterior Distributions and Modal Estimates in Markov Mixture Models.” Journal of Econometrics, 75 (1996), 79–97.CrossRefGoogle Scholar
Ellsberg, D.“Risk, Ambiguity, and the Savage Axioms.” Quarterly Journal of Economics, 75 (1961), 643–669.CrossRefGoogle Scholar
Epstein, L. G., and Wang, T.. “Intertemporal Asset Pricing under Knightian Uncertainty.” Econometrica, 62 (1994), 283–322.CrossRefGoogle Scholar
Fama, E., and French, K.. “Common Risk Factors in the Returns on Stocks and Bonds.” Journal of Financial Economics, 33 (1993), 3–56.CrossRefGoogle Scholar
French, K., and Poterba, J.. “Investor Diversification and International Equity Markets.” American Economic Review, 81 (1991), 222–226.Google Scholar
Garlappi, L.; Uppal, R.; and Wang, T.. “Portfolio Selection with Parameter and Model Uncertainty: A Multi-Prior Approach.” Review of Financial Studies, 20 (2007), 41–81.CrossRefGoogle Scholar
Gilboa, I., and Schmeidler, D.. “Maxmin Expected Utility with Non-Unique Priors.” Journal of Mathematical Economics, 18 (1989), 141–153.CrossRefGoogle Scholar
Gollier, C.“Portfolio Choices and Asset Prices: The Comparative Statics of Ambiguity Aversion.” Review of Economic Studies, 78 (2011), 1329–1344.CrossRefGoogle Scholar
Guidolin, M., and Timmermann, A.. “Asset Allocation under Multivariate Regime Switching.” Journal of Economic Dynamics and Control, 31 (2007), 3503–3544.CrossRefGoogle Scholar
Guidolin, M., and Timmermann, A.. “International Asset Allocation under Regime Switching, Skew and Kurtosis Preference.” Review of Financial Studies, 21 (2008), 889–935.CrossRefGoogle Scholar
Hansen, L. P., and Sargent, T. J.. Robustness, 2nd ed. Princeton, NJ: Princeton University Press (2007).CrossRefGoogle Scholar
Ju, N., and Miao, J.. “Ambiguity, Learning, and Asset Returns.” Econometrica, 80 (2012), 559–591.Google Scholar
Klibanoff, P.; Marinacci, M.; and Mukerji, S.. “A Smooth Model of Decision Making under Ambiguity.” Econometrica, 73 (2005), 1849–1892.CrossRefGoogle Scholar
Lewis, K.“Trying to Explain Home Bias in Equities and Consumption.” Journal of Economic Literature, 37 (1999), 571–608.CrossRefGoogle Scholar
Liu, H.“Robust Consumption and Portfolio Choice for Time Varying Investment Opportunities.” Annals of Finance, 6 (2010), 435–454.CrossRefGoogle Scholar
Liu, H.“Dynamic Portfolio Choice under Ambiguity and Regime Switching Mean Returns.” Journal of Economic Dynamics and Control, 35 (2011), 623–640.CrossRefGoogle Scholar
Liu, J.; Peleg, E.; and Subrahmanyam, A.. “Information, Expected Utility, and Portfolio Choice.” Journal of Financial and Quantitative Analysis, 45 (2010), 1221–1251.CrossRefGoogle Scholar
Maenhout, P.“Robust Portfolio Rules and Asset Pricing.” Review of Financial Studies, 17 (2004), 951–983.CrossRefGoogle Scholar
Maenhout, P.“Robust Portfolio Rules and Detection-Error Probabilities for a Mean-Reverting Risk Premium.” Journal of Economic Theory, 128 (2006), 136–163.CrossRefGoogle Scholar
Pastor, L.“Portfolio Selection and Asset Pricing Models.” Journal of Finance, 55 (2000), 179–223.CrossRefGoogle Scholar
Rothschild, M., and Stiglitz, J. E.. “Increasing Risk II: Its Economic Consequences.” Journal of Economic Theory, 5 (1971), 66–84.CrossRefGoogle Scholar
Segal, U.“The Ellsberg Paradox and Risk Aversion: An Anticipated Utility Approach.” International Economic Review, 28 (1987), 175–202.CrossRefGoogle Scholar
Segal, U., and Spivak, A.. “First Order versus Second Order Risk Aversion.” Journal of Economic Theory, 51 (1990), 111–125.CrossRefGoogle Scholar
Tesar, L., and Werner, I.. “Home Bias and High Turnover.” Journal of International Money and Finance, 14 (1995), 467–492.Google Scholar
Tu, J.“Is Regime Switching in Stock Returns Important in Portfolio Decisions?” Management Science, 56 (2010), 1198–1215.CrossRefGoogle Scholar
Uppal, R., and Wang, T.. “Model Misspecification and Underdiversification.” Journal of Finance, 58 (2003), 2465–2486.CrossRefGoogle Scholar
van Nieuwerburgh, S., and Veldkamp, L.. “Information Immobility and the Home Bias Puzzle.” Journal of Finance, 64 (2009), 1187–1215.CrossRefGoogle Scholar
von Neumann, J., and Morgenstern, O.. Theory of Games and Economic Behavior. Princeton, NJ: Princeton University Press (1944).Google Scholar
Warnock, F. E.“Home Bias and High Turnover Reconsidered.” Journal of International Money and Finance, 21 (2002), 795–805.CrossRefGoogle Scholar