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Social Interaction in the Family: Evidence from Investors’ Security Holdings

Author

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  • Samuli Knüpfer
  • Elias Rantapuska
  • Matti Sarvimäki

Abstract

We show that investors tend to hold the same securities as their parents. This intergenerational correlation is stronger for mothers and family members who are more likely to communicate with each other. An instrumental variables estimation and a natural experiment suggest that the correlation reflects social influence. This influence runs not only from parents to children, but also vice versa. The resulting holdings of identical securities increase intergenerational correlations in portfolio choice, exacerbate wealth inequality, and amplify the consequences of behavioral biases.

Suggested Citation

  • Samuli Knüpfer & Elias Rantapuska & Matti Sarvimäki, 2023. "Social Interaction in the Family: Evidence from Investors’ Security Holdings," Review of Finance, European Finance Association, vol. 27(4), pages 1297-1327.
    • Handle: RePEc:oup:revfin:v:27:y:2023:i:4:p:1297-1327.
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    More about this item

    Keywords

    Social interaction; portfolio choice; wealth inequality; behavioral bias;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G41 - Financial Economics - - Behavioral Finance - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making in Financial Markets
    • G51 - Financial Economics - - Household Finance - - - Household Savings, Borrowing, Debt, and Wealth

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