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

Ryan Ball, Christian Hofmann and Andreas Löffler

European Accounting Review, 2025, vol. 34, issue 4, 1529-1553

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.

Date: 2025
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DOI: 10.1080/09638180.2024.2403475

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