IDEAS home Printed from https://ideas.repec.org/a/eee/pacfin/v88y2024ics0927538x24003214.html

Gender difference in equity portfolio diversification

Author

Listed:
  • Wu, Zheng
  • Westerholm, P. Joakim

Abstract

This study provides compelling evidence that individual investors consistently maintain under-diversified portfolios, with female investors exhibiting significantly lower levels of diversification than their male counterparts. Analyzing a comprehensive dataset of retail investor trades, this study provides the first detailed examination of gender differences in trading activity, performance, and portfolio diversification. Performance, and diversification are systematically related to investor characteristics such as portfolio size, income, education, language, age, and investment experience. The result that increasing diversification improves performance for all investors corresponds with the fact that female investors are found to diversify less at the same time as they show a slightly lower aggregated performance than male investors.

Suggested Citation

  • Wu, Zheng & Westerholm, P. Joakim, 2024. "Gender difference in equity portfolio diversification," Pacific-Basin Finance Journal, Elsevier, vol. 88(C).
    • Handle: RePEc:eee:pacfin:v:88:y:2024:i:c:s0927538x24003214
    DOI: 10.1016/j.pacfin.2024.102569
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0927538X24003214
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.pacfin.2024.102569?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to

    for a different version of it.

    References listed on IDEAS

    as
    1. Mervyn A. King & Jonathan I. Leape, 1987. "Asset Accumulation, Information, and the Life Cycle," NBER Working Papers 2392, National Bureau of Economic Research, Inc.
    2. Juhani T. Linnainmaa, 2011. "Why Do (Some) Households Trade So Much?," The Review of Financial Studies, Society for Financial Studies, vol. 24(5), pages 1630-1666.
    3. Massimo Massa & Andrei Simonov, 2006. "Hedging, Familiarity and Portfolio Choice," The Review of Financial Studies, Society for Financial Studies, vol. 19(2), pages 633-685.
    4. Bekaert, Geert & Hoyem, Kenton & Hu, Wei-Yin & Ravina, Enrichetta, 2017. "Who is internationally diversified? Evidence from the 401(k) plans of 296 firms," Journal of Financial Economics, Elsevier, vol. 124(1), pages 86-112.
    5. Bertrand, Marianne, 2011. "New Perspectives on Gender," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 4, chapter 17, pages 1543-1590, Elsevier.
    6. Ayres, Ian & Siegelman, Peter, 1995. "Race and Gender Discrimination in Bargaining for a New Car," American Economic Review, American Economic Association, vol. 85(3), pages 304-321, June.
    7. Bok Baik & Jun-Koo Kang & Jin-Mo Kim & Joonho Lee, 2013. "The liability of foreignness in international equity investments: Evidence from the US stock market," Journal of International Business Studies, Palgrave Macmillan;Academy of International Business, vol. 44(4), pages 391-411, May.
    8. Han, Bing & Kumar, Alok, 2013. "Speculative Retail Trading and Asset Prices," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 48(2), pages 377-404, April.
    9. Ernesto Reuben & Paola Sapienza & Luigi Zingales, 2024. "Overconfidence and Preferences for Competition," Journal of Finance, American Finance Association, vol. 79(2), pages 1087-1121, April.
    10. Joshua D. Coval & Tobias J. Moskowitz, 1999. "Home Bias at Home: Local Equity Preference in Domestic Portfolios," Journal of Finance, American Finance Association, vol. 54(6), pages 2045-2073, December.
    11. Brian H. Boyer & Keith Vorkink, 2014. "Stock Options as Lotteries," Journal of Finance, American Finance Association, vol. 69(4), pages 1485-1527, August.
    12. Kelly, Morgan, 1995. "All their eggs in one basket: Portfolio diversification of US households," Journal of Economic Behavior & Organization, Elsevier, vol. 27(1), pages 87-96, June.
    13. Laurent E. Calvet & John Y. Campbell & Paolo Sodini, 2009. "Measuring the Financial Sophistication of Households," American Economic Review, American Economic Association, vol. 99(2), pages 393-398, May.
    14. Joseph Golec & Maurry Tamarkin, 1998. "Bettors Love Skewness, Not Risk, at the Horse Track," Journal of Political Economy, University of Chicago Press, vol. 106(1), pages 205-225, February.
    15. Bali, Turan G. & Cakici, Nusret & Whitelaw, Robert F., 2011. "Maxing out: Stocks as lotteries and the cross-section of expected returns," Journal of Financial Economics, Elsevier, vol. 99(2), pages 427-446, February.
    16. Grinblatt, Mark & Keloharju, Matti & Linnainmaa, Juhani T., 2012. "IQ, trading behavior, and performance," Journal of Financial Economics, Elsevier, vol. 104(2), pages 339-362.
    17. 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(3), pages 613-655, September.
    18. Mark Grinblatt & Matti Keloharju, 2001. "How Distance, Language, and Culture Influence Stockholdings and Trades," Journal of Finance, American Finance Association, vol. 56(3), pages 1053-1073, June.
    19. Lawrence, Edward R. & Nguyen, Thanh D. & Wick, Benedikt, 2024. "Gender difference in overconfidence and household financial literacy," Journal of Banking & Finance, Elsevier, vol. 166(C).
    20. Karlsson, Anders & Norden, Lars, 2007. "Home sweet home: Home bias and international diversification among individual investors," Journal of Banking & Finance, Elsevier, vol. 31(2), pages 317-333, February.
    21. Merton, Robert C, 1987. "A Simple Model of Capital Market Equilibrium with Incomplete Information," Journal of Finance, American Finance Association, vol. 42(3), pages 483-510, July.
    22. Sunden, Annika E & Surette, Brian J, 1998. "Gender Differences in the Allocation of Assets in Retirement Savings Plans," American Economic Review, American Economic Association, vol. 88(2), pages 207-211, May.
    23. William N. Goetzmann & Alok Kumar, 2008. "Equity Portfolio Diversification," Review of Finance, European Finance Association, vol. 12(3), pages 433-463.
    24. Nicholas Barberis & Ming Huang, 2008. "Stocks as Lotteries: The Implications of Probability Weighting for Security Prices," American Economic Review, American Economic Association, vol. 98(5), pages 2066-2100, December.
    25. William N. Goetzmann & Lingfeng Li & K. Geert Rouwenhorst, 2005. "Long-Term Global Market Correlations," The Journal of Business, University of Chicago Press, vol. 78(1), pages 1-38, January.
    26. Paul Goldsmith‐Pinkham & Kelly Shue, 2023. "The Gender Gap in Housing Returns," Journal of Finance, American Finance Association, vol. 78(2), pages 1097-1145, April.
    27. Huberman, Gur, 2001. "Familiarity Breeds Investment," The Review of Financial Studies, Society for Financial Studies, vol. 14(3), pages 659-680.
    28. Mark S. Seasholes & Ning Zhu, 2010. "Individual Investors and Local Bias," Journal of Finance, American Finance Association, vol. 65(5), pages 1987-2010, October.
    29. Castillo, Marco & Petrie, Ragan & Torero, Maximo & Vesterlund, Lise, 2013. "Gender differences in bargaining outcomes: A field experiment on discrimination," Journal of Public Economics, Elsevier, vol. 99(C), pages 35-48.
    30. Richard Deaves & Erik Lüders & Guo Ying Luo, 2009. "An Experimental Test of the Impact of Overconfidence and Gender on Trading Activity," Review of Finance, European Finance Association, vol. 13(3), pages 555-575.
    31. Muriel Niederle & Lise Vesterlund, 2007. "Do Women Shy Away From Competition? Do Men Compete Too Much?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 122(3), pages 1067-1101.
    32. Fiona Morton & Florian Zettelmeyer & Jorge Silva-Risso, 2003. "Consumer Information and Discrimination: Does the Internet Affect the Pricing of New Cars to Women and Minorities?," Quantitative Marketing and Economics (QME), Springer, vol. 1(1), pages 65-92, March.
    33. Brad M. Barber & Terrance Odean, 2000. "Trading Is Hazardous to Your Wealth: The Common Stock Investment Performance of Individual Investors," Journal of Finance, American Finance Association, vol. 55(2), pages 773-806, April.
    34. Kroll, Yoram & Levy, Haim & Rapoport, Amnon, 1988. "Experimental Tests of the Separation Theorem and the Capital Asset Pricing Model," American Economic Review, American Economic Association, vol. 78(3), pages 500-519, June.
    35. Alok Kumar, 2009. "Who Gambles in the Stock Market?," Journal of Finance, American Finance Association, vol. 64(4), pages 1889-1933, August.
    36. Simkowitz, Michael A. & Beedles, William L., 1978. "Diversification in a Three-Moment World," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 13(5), pages 927-941, December.
    37. Julie Agnew & Pierluigi Balduzzi & Annika Sundén, 2003. "Portfolio Choice and Trading in a Large 401(k) Plan," American Economic Review, American Economic Association, vol. 93(1), pages 193-215, March.
    38. Laurent E. Calvet & John Y. Campbell & Paolo Sodini, 2007. "Down or Out: Assessing the Welfare Costs of Household Investment Mistakes," Journal of Political Economy, University of Chicago Press, vol. 115(5), pages 707-747, October.
    39. Zoran Ivković & Scott Weisbenner, 2005. "Local Does as Local Is: Information Content of the Geography of Individual Investors' Common Stock Investments," Journal of Finance, American Finance Association, vol. 60(1), pages 267-306, February.
    40. Blume, Marshall E & Friend, Irwin, 1975. "The Asset Structure of Individual Portfolios and Some Implications for Utility Functions," Journal of Finance, American Finance Association, vol. 30(2), pages 585-603, May.
    41. Heath, Chip & Tversky, Amos, 1991. "Preference and Belief: Ambiguity and Competence in Choice under Uncertainty," Journal of Risk and Uncertainty, Springer, vol. 4(1), pages 5-28, January.
    42. Terrance Odean, 1999. "Do Investors Trade Too Much?," American Economic Review, American Economic Association, vol. 89(5), pages 1279-1298, December.
    43. John R. Graham & Campbell R. Harvey & Hai Huang, 2009. "Investor Competence, Trading Frequency, and Home Bias," Management Science, INFORMS, vol. 55(7), pages 1094-1106, July.
    44. Lars Norden, 2010. "Individual home bias, portfolio churning and performance," The European Journal of Finance, Taylor & Francis Journals, vol. 16(4), pages 329-351.
    45. Grinblatt, Mark & Keloharju, Matti, 2000. "The investment behavior and performance of various investor types: a study of Finland's unique data set," Journal of Financial Economics, Elsevier, vol. 55(1), pages 43-67, January.
    46. Brad M. Barber & Terrance Odean, 2001. "Boys will be Boys: Gender, Overconfidence, and Common Stock Investment," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 116(1), pages 261-292.
    47. Merkle, Christoph, 2017. "Financial overconfidence over time: Foresight, hindsight, and insight of investors," Journal of Banking & Finance, Elsevier, vol. 84(C), pages 68-87.
    48. Mark Grinblatt & Matti Keloharju & Juhani Linnainmaa, 2011. "IQ and Stock Market Participation," Journal of Finance, American Finance Association, vol. 66(6), pages 2121-2164, December.
    49. Brad M. Barber & Terrance Odean, 2008. "All That Glitters: The Effect of Attention and News on the Buying Behavior of Individual and Institutional Investors," The Review of Financial Studies, Society for Financial Studies, vol. 21(2), pages 785-818, April.
    50. Valery Polkovnichenko, 2005. "Household Portfolio Diversification: A Case for Rank-Dependent Preferences," The Review of Financial Studies, Society for Financial Studies, vol. 18(4), pages 1467-1502.
    51. Han, Bing & Hirshleifer, David & Walden, Johan, 2022. "Social Transmission Bias and Investor Behavior," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 57(1), pages 390-412, February.
    52. Russell Lundholm & Nafis Rahman & Rafael Rogo, 2018. "The Foreign Investor Bias and Its Linguistic Origins," Management Science, INFORMS, vol. 64(9), pages 4433-4450, September.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Wang, Minglu & Zhao, Shuchen & Jing, Peng, 2026. "Do peer effects in stock market participation enhance household portfolio efficiency? Evidence from China," International Review of Economics & Finance, Elsevier, vol. 105(C).
    2. Milazzo, Matteo & Musciotto, Federico & Piilo, Jyrki & Mantegna, Rosario N., 2026. "Heterogeneity of household stock portfolios in a national market," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 692(C).
    3. Wu, Zheng & Westerholm, P. Joakim & Wang, Zhen, 2026. "Diversification or distortion? The role of ETFs in retail investor portfolios and performance," Journal of Financial Stability, Elsevier, vol. 83(C).
    4. Jing, Peng & Zhao, Shuchen & Wang, Minglu, 2025. "From savings to investments: How retirement consumption expectations shape household risky financial asset allocation," Pacific-Basin Finance Journal, Elsevier, vol. 93(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Guiso, Luigi & Sodini, Paolo, 2013. "Household Finance: An Emerging Field," Handbook of the Economics of Finance, in: G.M. Constantinides & M. Harris & R. M. Stulz (ed.), Handbook of the Economics of Finance, volume 2, chapter 0, pages 1397-1532, Elsevier.
    2. Barber, Brad M. & Odean, Terrance, 2013. "The Behavior of Individual Investors," Handbook of the Economics of Finance, in: G.M. Constantinides & M. Harris & R. M. Stulz (ed.), Handbook of the Economics of Finance, volume 2, chapter 0, pages 1533-1570, Elsevier.
    3. Francisco Gomes & Michael Haliassos & Tarun Ramadorai, 2021. "Household Finance," Journal of Economic Literature, American Economic Association, vol. 59(3), pages 919-1000, September.
    4. Cheng, Tzu-Chang Forrest & Huang, Hsuan-Hua & Lin, Tse-Chun & Yang, Tzu-Ting & Zhu, Jian-Da, 2025. "Windfall gains and stock market participation: Evidence from shopping receipt lottery," Journal of Banking & Finance, Elsevier, vol. 172(C).
    5. John Y. Campbell, 2006. "Household Finance," Journal of Finance, American Finance Association, vol. 61(4), pages 1553-1604, August.
    6. Bailey, Warren & Kumar, Alok & Ng, David, 2010. "Behavioral Biases of Mutual Fund Investors," Working Papers 10-23, University of Pennsylvania, Wharton School, Weiss Center.
    7. David Gorzon & Marc Bormann & Ruediger Nitzsch, 2024. "Measuring costly behavioral bias factors in portfolio management: a review," Financial Markets and Portfolio Management, Springer;Swiss Society for Financial Market Research, vol. 38(2), pages 265-295, June.
    8. Daniel Barth, 2018. "The Costs and Beliefs Implied by Direct Stock Ownership," Management Science, INFORMS, vol. 64(11), pages 5263-5288, November.
    9. John Y. Campbell & Tarun Ramadorai & Benjamin Ranish, 2014. "Getting Better or Feeling Better? How Equity Investors Respond to Investment Experience," NBER Working Papers 20000, National Bureau of Economic Research, Inc.
    10. Bui, Dien Giau & Hasan, Iftekhar & Lin, Chih-Yung & Zhai, Rui-Xiang, 2022. "Income, trading, and performance: Evidence from retail investors," Journal of Empirical Finance, Elsevier, vol. 66(C), pages 176-195.
    11. Phelim Boyle & Lorenzo Garlappi & Raman Uppal & Tan Wang, 2012. "Keynes Meets Markowitz: The Trade-Off Between Familiarity and Diversification," Management Science, INFORMS, vol. 58(2), pages 253-272, February.
    12. D’Hondt, Catherine & De Winne, Rudy & Merli, Maxime, 2021. "Do retail investors bite off more than they can chew? A close look at their return objectives," Journal of Economic Behavior & Organization, Elsevier, vol. 188(C), pages 879-902.
    13. Camille Magron, 2012. "Performance of individual investors and personal investment objectives," Working Papers of LaRGE Research Center 2012-07, Laboratoire de Recherche en Gestion et Economie (LaRGE), Université de Strasbourg.
    14. Bailey, Warren & Kumar, Alok & Ng, David, 2011. "Behavioral biases of mutual fund investors," Journal of Financial Economics, Elsevier, vol. 102(1), pages 1-27, October.
    15. Camille Magron & Maxime Merli, 2012. "Stocks repurchase and sophistication of individual investors," Working Papers of LaRGE Research Center 2012-02, Laboratoire de Recherche en Gestion et Economie (LaRGE), Université de Strasbourg.
    16. David Hirshleife, 2015. "Behavioral Finance," Annual Review of Financial Economics, Annual Reviews, vol. 7(1), pages 133-159, December.
    17. Meyer, Steffen & Urban, Linda & Ahlswede, Sophie, 2015. "Does a personalized feedback on investment success mitigate investment mistakes of private investors? Answers from large natural field experiment," VfS Annual Conference 2015 (Muenster): Economic Development - Theory and Policy 112988, Verein für Socialpolitik / German Economic Association.
    18. Eduard Gaar & David Scherer & Dirk Schiereck, 2022. "The home bias and the local bias: A survey," Management Review Quarterly, Springer, vol. 72(1), pages 21-57, February.
    19. Abrahamson, Martin, 2016. "“Rookies to the stock market: A portrait of new shareholders”," Research in International Business and Finance, Elsevier, vol. 38(C), pages 565-576.
    20. Lu, Xiaomeng & Zhang, Yong & Zhang, Yixing & Wang, Lin, 2020. "Can investment advisors promote rational investment? Evidence from micro-data in China," Economic Modelling, Elsevier, vol. 86(C), pages 251-263.

    More about this item

    Keywords

    ;
    ;
    ;

    JEL classification:

    • G3 - Financial Economics - - Corporate Finance and Governance

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:pacfin:v:88:y:2024:i:c:s0927538x24003214. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/locate/pacfin .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.