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Trading ambiguity: a tale of two heterogeneities

Author

Listed:
  • Sujoy Mukerji

    (QMUL - Queen Mary University of London)

  • Han Ozsoylev

    (Özyeğin University)

  • Jean-Marc Tallon

    (PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris sciences et lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, PJSE - Paris Jourdan Sciences Economiques - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris sciences et lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

Abstract

We consider markets with heterogeneously ambiguous assets and heterogeneously ambiguity‐averse investors whose preferences are a parsimonious extension of the mean–variance framework. We study portfolio choice and trade upon arrival of public information, and show systematic departures from the predictions of standard theory, that occur in the direction of empirical regularities. In particular, our theory speaks to several phenomena in a unified fashion: the asset allocation puzzle, the observation that earnings announcements are followed by significant trading volume with small price change, and that increases in uncertainty are positively associated with increased trading activity and portfolio rebalancing toward safer assets.

Suggested Citation

  • Sujoy Mukerji & Han Ozsoylev & Jean-Marc Tallon, 2023. "Trading ambiguity: a tale of two heterogeneities," Post-Print halshs-04213388, HAL.
    • Handle: RePEc:hal:journl:halshs-04213388
    DOI: 10.1111/iere.12627
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