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Optimal investment and equilibrium pricing under ambiguity

Author

Listed:
  • Michail Anthropelos
  • Paul Schneider

Abstract

We study a model for portfolio selection under uncertainty along with market equilibria that are associated with the optimal positions. Allowing for both ambiguity-seeking and ambiguity-averse market participants, model-implied demand functions resemble observed bid–ask spreads, and are consistent with extant limited-participation results based on more specialized ambiguity settings. A Pareto-efficient second-best equilibrium arises from constraining the portfolio allocations of ambiguity seekers. It implies that heterogeneity in ambiguity preferences is sufficient for mutually beneficial transactions even among all else homogeneous traders. Our results reconcile many observed phenomena in liquid high-information financial markets, such as portfolio inertia and negative risk premia.

Suggested Citation

  • Michail Anthropelos & Paul Schneider, 2024. "Optimal investment and equilibrium pricing under ambiguity," Review of Finance, European Finance Association, vol. 28(6), pages 1759-1805.
    • Handle: RePEc:oup:revfin:v:28:y:2024:i:6:p:1759-1805.
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    File URL: http://hdl.handle.net/10.1093/rof/rfae032
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    More about this item

    Keywords

    ambiguity; optimal portfolio; equilibrium;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G41 - Financial Economics - - Behavioral Finance - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making in Financial Markets
    • C62 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Existence and Stability Conditions of Equilibrium
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations

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