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The Role of Public Information in Capital Markets with Investors of Unknown Risk Attitudes

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  • Ryan Ball
  • Christian Hofmann
  • Andreas Löffler

Abstract

We consider a single-period, pure-exchange setting where investors have mean-variance preferences. Investors are uncertain about the risk attitudes of other capital market participants and, thus, about the market's risk premium. Assuming that there are no strategic interactions among investors, we identify conditions under which investors choose to abstain from trading in the capital market due to the risk associated with an uncertain risk premium. In addition, we find that investors may prefer the disclosure of public information prior to trading, as this information reduces the risk premium and thus relaxes the condition for market participation. Therefore, the presence of investors with unknown risk attitudes suggests a beneficial role for public (accounting) information.

Suggested Citation

  • Ryan Ball & Christian Hofmann & Andreas Löffler, 2025. "The Role of Public Information in Capital Markets with Investors of Unknown Risk Attitudes," European Accounting Review, Taylor & Francis Journals, vol. 34(4), pages 1529-1553, August.
    • Handle: RePEc:taf:euract:v:34:y:2025:i:4:p:1529-1553
    DOI: 10.1080/09638180.2024.2403475
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