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Investor Sophistication and Portfolio Dynamics

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  • Buss, Adrian
  • Vilkov, Grigory
  • Uppal, Raman

Abstract

We develop a simple dynamic general-equilibrium framework that can jointly rationalize many empirically observed features of household portfolios, investment returns, and wealth dynamics. The model differs from traditional models only along a single, natural dimension: households differ in their confidence about the return processes for risky assets. Less-confident households (but with unbiased beliefs) overinvest in safe assets, hold underdiversified portfolios concentrated in familiar assets, are trend chasers, and earn lower absolute and risk-adjusted investment returns. More confident households hold riskier positions and exhibit superior market-timing abilities. Despite Bayesian learning, this investment behavior persists for long periods, thereby exacerbating wealth inequality.

Suggested Citation

  • Buss, Adrian & Vilkov, Grigory & Uppal, Raman, 2020. "Investor Sophistication and Portfolio Dynamics," CEPR Discussion Papers 15116, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:15116
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    More about this item

    Keywords

    Household finance; Portfolio dynamics; Wealth inequality; Belief formation; Investors' expectations; Trend chasing; Market timing;
    All these keywords.

    JEL classification:

    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G51 - Financial Economics - - Household Finance - - - Household Savings, Borrowing, Debt, and Wealth
    • G53 - Financial Economics - - Household Finance - - - Financial Literacy

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