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Why are older investors less willing to take financial risks?

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  • Brooks, Chris
  • Sangiorgi, Ivan
  • Hillenbrand, Carola
  • Money, Kevin

Abstract

We investigate the link between age and tolerance of financial risks in the context of attitude to risk questionnaires completed by clients when meeting their financial advisors. Using a unique database comprising the responses to over half a million such questionnaires, we show that risk tolerance declines at an increasing, albeit slow, rate with age. We investigate the explanatory power of the ability to bear losses, declining investment horizon and retirement effects, finding that these variables have considerably greater explanatory power for the cross-section of risk aversion than age, and that they are only able to partially mediate the link between age and risk tolerance. We are unable to uncover any evidence that declining cognitive abilities among older investors are able to explain their lower willingness to take financial risks. Overall, our results are indicative of a modest age effect in risk tolerance that cannot be attributed to changes in other observable characteristics that differ between younger and older investors.

Suggested Citation

  • Brooks, Chris & Sangiorgi, Ivan & Hillenbrand, Carola & Money, Kevin, 2018. "Why are older investors less willing to take financial risks?," International Review of Financial Analysis, Elsevier, vol. 56(C), pages 52-72.
  • Handle: RePEc:eee:finana:v:56:y:2018:i:c:p:52-72
    DOI: 10.1016/j.irfa.2017.12.008
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    1. Ola Andersson & Håkan J. Holm & Jean-Robert Tyran & Erik Wengström, 2016. "Deciding for Others Reduces Loss Aversion," Management Science, INFORMS, vol. 62(1), pages 29-36, January.
    2. French, Declan & McKillop, Donal, 2016. "Financial literacy and over-indebtedness in low-income households," International Review of Financial Analysis, Elsevier, vol. 48(C), pages 1-11.
    3. Yao, Rui & Sharpe, Deanna L. & Wang, Feifei, 2011. "Decomposing the age effect on risk tolerance," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 40(6), pages 879-887.
    4. Schurer, Stefanie, 2017. "Bouncing back from health shocks: Locus of control and labor supply," Journal of Economic Behavior & Organization, Elsevier, vol. 133(C), pages 1-20.
    5. Andreas Fagereng & Charles Gottlieb & Luigi Guiso, 2017. "Asset Market Participation and Portfolio Choice over the Life-Cycle," Journal of Finance, American Finance Association, vol. 72(2), pages 705-750, April.
    6. Tausch, Franziska & Zumbuehl, Maria, 2018. "Stability of risk attitudes and media coverage of economic news," Journal of Economic Behavior & Organization, Elsevier, vol. 150(C), pages 295-310.
    7. Camerer, Colin F & Hogarth, Robin M, 1999. "The Effects of Financial Incentives in Experiments: A Review and Capital-Labor-Production Framework," Journal of Risk and Uncertainty, Springer, vol. 19(1-3), pages 7-42, December.
    8. Bryan D James & Patricia A Boyle & Lei Yu & S Duke Han & David A Bennett, 2015. "Cognitive Decline Is Associated with Risk Aversion and Temporal Discounting in Older Adults without Dementia," PLOS ONE, Public Library of Science, vol. 10(4), pages 1-12, April.
    9. Sujoy Chakravarty & Glenn W. Harrison & Ernan E. Haruvy & E. Elisabet Rutström, 2011. "Are You Risk Averse over Other People's Money?," Southern Economic Journal, John Wiley & Sons, vol. 77(4), pages 901-913, April.
    10. Sunghan Kim & David Goldstein & Lynn Hasher & Rose T. Zacks, 2005. "Framing Effects in Younger and Older Adults," The Journals of Gerontology: Series B, The Gerontological Society of America, vol. 60(4), pages 215-218.
    11. Chris Browning & Michael Finke, 2015. "Cognitive Ability and the Stock Reallocations of Retirees during the Great Recession," Journal of Consumer Affairs, Wiley Blackwell, vol. 49(2), pages 356-375, July.
    12. Eleonora Patacchini & Edoardo Rainone, 2017. "Social Ties and the Demand for Financial Services," Journal of Financial Services Research, Springer;Western Finance Association, vol. 52(1), pages 35-88, October.
    13. Thomas Dohmen & Armin Falk & David Huffman & Uwe Sunde & Jürgen Schupp & Gert G. Wagner, 2011. "Individual Risk Attitudes: Measurement, Determinants, And Behavioral Consequences," Journal of the European Economic Association, European Economic Association, vol. 9(3), pages 522-550, June.
    14. Lee, Boram & Rosenthal, Leonard & Veld, Chris & Veld-Merkoulova, Yulia, 2015. "Stock market expectations and risk aversion of individual investors," International Review of Financial Analysis, Elsevier, vol. 40(C), pages 122-131.
    15. Sumit Agarwal & John C. Driscoll & Xavier Gabaix & David Laibson, 2009. "The Age of Reason: Financial Decisions over the Life Cycle and Implications for Regulation," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 40(2 (Fall)), pages 51-117.
    16. Charles A. Holt & Susan K. Laury, 2002. "Risk Aversion and Incentive Effects," American Economic Review, American Economic Association, vol. 92(5), pages 1644-1655, December.
    17. Susann Rohwedder & Robert J. Willis, 2010. "Mental Retirement," Journal of Economic Perspectives, American Economic Association, vol. 24(1), pages 119-138, Winter.
    18. Julius Pahlke & Sebastian Strasser & Ferdinand Vieider, 2015. "Responsibility effects in decision making under risk," Journal of Risk and Uncertainty, Springer, vol. 51(2), pages 125-146, October.
    19. George M Korniotis & Alok Kumar, 2011. "Do Older Investors Make Better Investment Decisions?," The Review of Economics and Statistics, MIT Press, vol. 93(1), pages 244-265, February.
    20. Alessandro Bucciol & Raffaele Miniaci, 2011. "Household Portfolios and Implicit Risk Preference," The Review of Economics and Statistics, MIT Press, vol. 93(4), pages 1235-1250, November.
    21. McInish, Thomas H., 1982. "Individual investors and risk-taking," Journal of Economic Psychology, Elsevier, vol. 2(2), pages 125-136, June.
    22. Alper Kara & Philip Molyneux, 2017. "Household Access to Mortgages in the UK," Journal of Financial Services Research, Springer;Western Finance Association, vol. 52(3), pages 253-275, December.
    23. Schurer, Stefanie, 2015. "Lifecycle patterns in the socioeconomic gradient of risk preferences," Journal of Economic Behavior & Organization, Elsevier, vol. 119(C), pages 482-495.
    24. Pierre‐André Chiappori & Monica Paiella, 2011. "Relative Risk Aversion Is Constant: Evidence From Panel Data," Journal of the European Economic Association, European Economic Association, vol. 9(6), pages 1021-1052, December.
    25. Paul Gerrans & Robert Faff & Neil Hartnett & Henk Berkman, 2015. "Individual financial risk tolerance and the global financial crisis," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 55(1), pages 165-185, March.
    26. Alok Kumar, 2009. "Who Gambles in the Stock Market?," Journal of Finance, American Finance Association, vol. 64(4), pages 1889-1933, August.
    27. Morin, Roger A & Fernandez Suarez, Antonio, 1983. "Risk Aversion Revisited," Journal of Finance, American Finance Association, vol. 38(4), pages 1201-1216, September.
    28. Kovalchik, Stephanie & Camerer, Colin F. & Grether, David M. & Plott, Charles R. & Allman, John M., 2005. "Aging and decision making: a comparison between neurologically healthy elderly and young individuals," Journal of Economic Behavior & Organization, Elsevier, vol. 58(1), pages 79-94, September.
    29. J. Scott Long & Jeremy Freese, 2006. "Regression Models for Categorical Dependent Variables using Stata, 2nd Edition," Stata Press books, StataCorp LP, edition 2, number long2, March.
    30. Lex Borghans & Bart H. H. Golsteyn & James J. Heckman & Huub Meijers, 2009. "Gender Differences in Risk Aversion and Ambiguity Aversion," Journal of the European Economic Association, MIT Press, vol. 7(2-3), pages 649-658, 04-05.
    31. Davydov, Denis & Florestedt, Otto & Peltomäki, Jarkko & Schön, Marcus, 2017. "Portfolio performance across genders and generations: The role of financial innovation," International Review of Financial Analysis, Elsevier, vol. 50(C), pages 44-51.
    32. Pablo Antolin, 2010. "Private pensions and the financial crisis: How to ensure adequate retirement income from DC pension plans," OECD Journal: Financial Market Trends, OECD Publishing, vol. 2009(2), pages 153-179.
    33. Bonsang, Eric & Dohmen, Thomas, 2015. "Risk attitude and cognitive aging," Journal of Economic Behavior & Organization, Elsevier, vol. 112(C), pages 112-126.
    34. Veld-Merkoulova, Yulia V., 2011. "Investment horizon and portfolio choice of private investors," International Review of Financial Analysis, Elsevier, vol. 20(2), pages 68-75, April.
    35. Laibson, David I. & Agarwal, Sumit & Driscoll, John C. & Gabaix, Xavier, 2009. "The Age of Reason: Financial Decisions over the Life-Cycle with Implications for Regulation," Scholarly Articles 4554335, Harvard University Department of Economics.
    36. Ann Yang, 2013. "Decision Making for Individual Investors: A Measurement of Latent Difficulties," Journal of Financial Services Research, Springer;Western Finance Association, vol. 44(3), pages 303-329, December.
    37. Shapira, Zur & Venezia, Itzhak, 2001. "Patterns of behavior of professionally managed and independent investors," Journal of Banking & Finance, Elsevier, vol. 25(8), pages 1573-1587, August.
    38. Friesen, Geoffrey C. & Sapp, Travis R.A., 2007. "Mutual fund flows and investor returns: An empirical examination of fund investor timing ability," Journal of Banking & Finance, Elsevier, vol. 31(9), pages 2796-2816, September.
    39. 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.
    40. Nicky J. Welton & Howard H. Z. Thom, 2015. "Value of Information," Medical Decision Making, , vol. 35(5), pages 564-566, July.
    41. Bellante, Don & Green, Carole A., 2004. "Relative risk aversion among the elderly," Review of Financial Economics, Elsevier, vol. 13(3), pages 269-281.
    42. Daniel J. Benjamin & Sebastian A. Brown & Jesse M. Shapiro, 2013. "Who Is ‘Behavioral’? Cognitive Ability And Anomalous Preferences," Journal of the European Economic Association, European Economic Association, vol. 11(6), pages 1231-1255, December.
    43. Antoine Bommier & Jean-Charles Rochet, 2006. "Risk Aversion and Planning Horizons," Journal of the European Economic Association, MIT Press, vol. 4(4), pages 708-734, June.
    44. Lex Borghans & Bart H.H. Golsteyn & James J. Heckman & Huub Meijers, 2009. "Gender Differences in Risk Aversion and Ambiguity," Working Papers 200903, Geary Institute, University College Dublin.
    45. Alan, Sule & Baydar, Nazli & Boneva, Teodora & Crossley, Thomas F. & Ertac, Seda, 2017. "Transmission of risk preferences from mothers to daughters," Journal of Economic Behavior & Organization, Elsevier, vol. 134(C), pages 60-77.
    46. Robert Faff & Daniel Mulino & Daniel Chai, 2008. "On The Linkage Between Financial Risk Tolerance And Risk Aversion," Journal of Financial Research, Southern Finance Association;Southwestern Finance Association, vol. 31(1), pages 1-23, March.
    47. Jeffrey Bailey & John Nofsinger & Michele O'Neill, 2003. "A Review of Major Influences on Employee Retirement Investment Decisions," Journal of Financial Services Research, Springer;Western Finance Association, vol. 23(2), pages 149-165, April.
    48. Nancy Ammon Jianakoplos & Alexandra Bernasek, 2006. "Financial Risk Taking by Age and Birth Cohort," Southern Economic Journal, John Wiley & Sons, vol. 72(4), pages 981-1001, April.
    49. Martin Weber & Elke U. Weber & Alen Nosić, 2013. "Who takes Risks When and Why: Determinants of Changes in Investor Risk Taking," Review of Finance, European Finance Association, vol. 17(3), pages 847-883.
    50. 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.
    51. Kariofyllas, Spyridon & Philippas, Dionisis & Siriopoulos, Costas, 2017. "Cognitive biases in investors' behaviour under stress: Evidence from the London Stock Exchange," International Review of Financial Analysis, Elsevier, vol. 54(C), pages 54-62.
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    Cited by:

    1. Chris Brooks & Ivan Sangiorgi & Anastasiya Saraeva & Carola Hillenbrand & Kevin Money, 2023. "The importance of staying positive: The impact of emotions on attitude to risk," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 28(3), pages 3232-3261, July.
    2. Niculaescu, Corina E. & Sangiorgi, Ivan & Bell, Adrian R., 2023. "Does personal experience with COVID-19 impact investment decisions? Evidence from a survey of US retail investors," International Review of Financial Analysis, Elsevier, vol. 88(C).
    3. Yaron Zelekha & Gitit Kavé, 2022. "Entrepreneurial tendency across the adult lifespan," PLOS ONE, Public Library of Science, vol. 17(2), pages 1-18, February.
    4. James Banks & Elena Bassoli & Irene Mammi, 2019. "Changing Risk Preferences at Older Ages," Working Papers 2019:01, Department of Economics, University of Venice "Ca' Foscari".
    5. John Grable & Eun Jin Kwak & Martha Fulk & Aditi Routh, 2022. "A Simplified Measure of Investor Risk Aversion," Journal of Interdisciplinary Economics, , vol. 34(1), pages 7-34, January.
    6. Agostino Capponi & Sveinn Olafsson & Thaleia Zariphopoulou, 2019. "Personalized Robo-Advising: Enhancing Investment through Client Interaction," Papers 1911.01391, arXiv.org, revised Nov 2020.
    7. Brooks, Chris & Williams, Louis, 2021. "The impact of personality traits on attitude to financial risk," Research in International Business and Finance, Elsevier, vol. 58(C).
    8. Suné Ferreira & Zandri Dickason-Koekemoer, 2020. "A structural equation model of financial risk tolerance in South Africa," Cogent Business & Management, Taylor & Francis Journals, vol. 7(1), pages 1811595-181, January.
    9. Banks, James & Bassoli, Elena & Mammi, Irene, 2020. "Changing attitudes to risk at older ages: The role of health and other life events," Journal of Economic Psychology, Elsevier, vol. 79(C).
    10. John Grable & Dee Warmath & Eun Jin Kwak, 2022. "An Assessment of the Association between Political Orientation and Financial Risk Tolerance," JRFM, MDPI, vol. 15(5), pages 1-16, April.
    11. Mariia Evdokimova & Anastasia Stepanova, 2023. "Students’ Propensity To Innovate: Correlates, Determinants, And Impact On GPA," HSE Working papers WP BRP 265/EC/2023, National Research University Higher School of Economics.
    12. Inhwa Kim & Keith J. Gamble, 2022. "Too much or too little information: how unknown uncertainty fuels time inconsistency," SN Business & Economics, Springer, vol. 2(2), pages 1-33, February.
    13. Brooks, Chris & Sangiorgi, Ivan & Hillenbrand, Carola & Money, Kevin, 2019. "Experience wears the trousers: Exploring gender and attitude to financial risk," Journal of Economic Behavior & Organization, Elsevier, vol. 163(C), pages 483-515.
    14. Anbar, Adem & Eker, Melek, 2019. "The Effect of Sociodemographic Variables and Love of Money on Financial Risk Tolerance of Bankers," Business and Economics Research Journal, Uludag University, Faculty of Economics and Administrative Sciences, vol. 10(4), pages 855-866, July.
    15. Agostino Capponi & Sveinn Ólafsson & Thaleia Zariphopoulou, 2022. "Personalized Robo-Advising: Enhancing Investment Through Client Interaction," Management Science, INFORMS, vol. 68(4), pages 2485-2512, April.
    16. Geoffrey J Warren, 2022. "Design of comprehensive income products for retirement using utility functions," Australian Journal of Management, Australian School of Business, vol. 47(1), pages 105-134, February.
    17. Blake, David & Duffield, Mel & Tonks, Ian & Haig, Alistair & Blower, Dean & MacPhee, Laura, 2022. "Smart defaults: Determining the number of default funds in a pension scheme," The British Accounting Review, Elsevier, vol. 54(4).
    18. Baker, H. Kent & Kumar, Satish & Goyal, Kirti & Sharma, Anuj, 2021. "International review of financial analysis: A retrospective evaluation between 1992 and 2020," International Review of Financial Analysis, Elsevier, vol. 78(C).

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    More about this item

    Keywords

    Retail investors; Risk tolerance; Attitude to risk; Effect of aging; Cognitive decline;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G20 - Financial Economics - - Financial Institutions and Services - - - General
    • J14 - Labor and Demographic Economics - - Demographic Economics - - - Economics of the Elderly; Economics of the Handicapped; Non-Labor Market Discrimination
    • C25 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions; Probabilities

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