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Does Aggregated Returns Disclosure Increase Portfolio Risk Taking?

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Area of Science:

  • Behavioral economics
  • Financial decision-making
  • Investment behavior

Background:

  • Prior experiments suggest information aggregation (e.g., less frequent returns) increases investment risk.
  • These findings are based on simplified experimental settings.

Purpose of the Study:

  • To investigate if information aggregation effects on investment risk persist in a more realistic financial environment.
  • To test the robustness of previously documented aggregation effects.

Main Methods:

  • Experimental manipulation of information presentation (frequency, aggregation level, horizon).
  • Introduction of a multi-day delay between investment choice and return realization.
  • Comparison of investment decisions in realistic versus simplified environments.

Main Results:

  • Information aggregation treatments did not significantly affect total equity investment in the realistic setting.
  • Previously observed increases in risk-taking due to information aggregation were not replicated.
  • Robustness checks revealed aggregation effects were sensitive to return distribution changes and delayed feedback.

Conclusions:

  • The impact of information aggregation on investment risk-taking is context-dependent.
  • Simplified experimental conditions may overestimate the effects of information aggregation on real-world investment behavior.
  • Future research should incorporate greater realism to better understand investor decision-making.