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Market Size, the Informational Content of Stock Prices and Risk: A Multiasset Model and some Evidence

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  • Pagano, Marco

Abstract

Market thinness can be an important determinant of the riskiness of stock returns, because it reduces the reliability of stock prices as predictors of future dividends. This paper analyses the relationship between market size and risk as the outcome of rational expectations equilibrium in a multiasset model with transaction costs, and shows that: (i) the conditional and measured variance of stock returns should be higher for thin issues ceteris paribus, and (ii) this thinness-variability relationship should arise only from the unsystematic component of the variance. These predictions are tested on data from the Milan Stock Exchange and appear to be supported by the evidence.

Suggested Citation

  • Pagano, Marco, 1986. "Market Size, the Informational Content of Stock Prices and Risk: A Multiasset Model and some Evidence," CEPR Discussion Papers 144, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:144
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    Cited by:

    1. Sergio Destefanis & Vania Sena, 2007. "Patterns of corporate governance and technical efficiency in Italian manufacturing," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 28(1), pages 27-40.
    2. Juan Dubra & Helios Herrera, 2002. "Market Participation, Information and Volatility," Working Papers 0206, Centro de Investigacion Economica, ITAM.

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