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Information Acquisition and Portfolio Performance

  • Luigi Guiso
  • Tullio Jappelli

Rational investors perceive correctly the value of financial information. Investment in information is therefore rewarded with a higher Sharpe ratio. Overcon.dent investors overstate the quality of their own information, and thus attain a lower Sharpe ratio. We contrast the implications of the two models using a unique survey of customers of an Italian leading bank with portfolio data and measures of financial information. We find that the portfolio Sharpe ratio is negatively associated with investment in information. The negative correlation is stronger for men than women and for those who claim they know stocks well, arguably because these investors are more likely to be overcon.dent. We also show that investment in information is associated with more frequent trading, less delegation of portfolio decisions and less diversified portfolios. In each case, the effect of information is stronger for investors who, a priori, are suspected to be more overconfident.

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Paper provided by European University Institute in its series Economics Working Papers with number ECO2007/45.

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Date of creation: 2007
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Handle: RePEc:eui:euiwps:eco2007/45
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  1. Laurent E. Calvet & John Y. Campbell & Paolo Sodini, 2006. "Down or Out: Assessing the Welfare Costs of Household Investment Mistakes," NBER Working Papers 12030, National Bureau of Economic Research, Inc.
  2. Laura Veldkamp & Stijn Van Nieuwerburgh, 2005. "Information Acquisition and Portfolio Underdiversification," 2005 Meeting Papers 77, Society for Economic Dynamics.
  3. Ivković, Zoran & Sialm, Clemens & Weisbenner, Scott, 2008. "Portfolio Concentration and the Performance of Individual Investors," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 43(03), pages 613-655, September.
  4. Luigi Guiso & Monica Paiella, 2003. "Risk Aversion, Wealth and Background Risk," Temi di discussione (Economic working papers) 483, Bank of Italy, Economic Research and International Relations Area.
  5. Bilias, Yannis & Georgarakos, Dimitris & Haliassos, Michalis, 2009. "Portfolio Inertia and Stock Market Fluctuations," CEPR Discussion Papers 7239, C.E.P.R. Discussion Papers.
  6. Robert B. Barsky & Miles S. Kimball & F. Thomas Juster & Matthew D. Shapiro, 1995. "Preference Parameters and Behavioral Heterogeneity: An Experimental Approach in the Health and Retirement Survey," NBER Working Papers 5213, National Bureau of Economic Research, Inc.
  7. Klayman, Joshua & Soll, Jack B. & Gonzalez-Vallejo, Claudia & Barlas, Sema, 1999. "Overconfidence: It Depends on How, What, and Whom You Ask, , , , , , , , ," Organizational Behavior and Human Decision Processes, Elsevier, vol. 79(3), pages 216-247, September.
  8. Brad M. Barber & Terrance Odean, 2001. "Boys Will Be Boys: Gender, Overconfidence, And Common Stock Investment," The Quarterly Journal of Economics, MIT Press, vol. 116(1), pages 261-292, February.
  9. Huberman, Gur, 2001. "Familiarity Breeds Investment," Review of Financial Studies, Society for Financial Studies, vol. 14(3), pages 659-80.
  10. Grossman, Sanford J & Stiglitz, Joseph E, 1980. "On the Impossibility of Informationally Efficient Markets," American Economic Review, American Economic Association, vol. 70(3), pages 393-408, June.
  11. Massa, Massimo & Simonov, Andrei, 2004. "Hedging, Familiarity and Portfolio Choice," SIFR Research Report Series 21, Institute for Financial Research.
  12. Verrecchia, Robert E, 1982. "Information Acquisition in a Noisy Rational Expectations Economy," Econometrica, Econometric Society, vol. 50(6), pages 1415-30, November.
  13. Nicholas Barberis & Richard Thaler, 2002. "A Survey of Behavioral Finance," NBER Working Papers 9222, National Bureau of Economic Research, Inc.
  14. Gadi Barlevy & Pietro Veronesi, . "Information Acquisition in Financial Markets," CRSP working papers 360, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
  15. Joël Peress, 2004. "Wealth, Information Acquisition, and Portfolio Choice," Review of Financial Studies, Society for Financial Studies, vol. 17(3), pages 879-914.
  16. Terrance Odean, 1999. "Do Investors Trade Too Much?," American Economic Review, American Economic Association, vol. 89(5), pages 1279-1298, December.
  17. Terrance Odean, 1998. "Are Investors Reluctant to Realize Their Losses?," Journal of Finance, American Finance Association, vol. 53(5), pages 1775-1798, October.
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