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Trading under uncertainty about other market participants

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  • Dimitris Papadimitriou

Abstract

I present an asymmetric information model of financial markets in which there is uncertainty and learning not only about fundamentals but also about the proportion of informed‐to‐noise traders in the market. Extreme news leads to an increase in both types of uncertainty, while it decreases price informativeness. Uncertainty about the market composition constitutes a type of liquidity risk and is associated with high expected returns. The resulting price–volume relationship is U‐shaped and positively sloped. In a dynamic extension of the model I show that this mechanism generates momentum as well as history‐dependent volatility and price informativeness.

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  • Dimitris Papadimitriou, 2023. "Trading under uncertainty about other market participants," The Financial Review, Eastern Finance Association, vol. 58(2), pages 343-367, May.
    • Handle: RePEc:bla:finrev:v:58:y:2023:i:2:p:343-367
    DOI: 10.1111/fire.12333
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    3. Ryan Flugum & Choonsik Lee & Matthew E. Souther, 2023. "What happens in Vegas stays in Vegas? Firsthand experience and EDGAR search activity in Las Vegas casino hotels," Financial Management, Financial Management Association International, vol. 52(3), pages 409-432, September.

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