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Short-term Investment and the Informational Efficiency of the Market

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  • Xavier Vives

Abstract

A dynamic market for a risky asset with a continuum of risk averse heterogeneously informed investors and a risk neutral competitive market sector is examined. The market is (semi-strong) informationally efficient due to competitive market making activity. The paper analyzes the effect of investors' horizons on the information content of prices (precision in the estimation of the fundamental value of the risky asset). It is shown that short horizons enhance or reduce price informativeness depending on the temporal pattern of private information arrival. With concentrated arrival of information short horizons reduce price informativeness, with diffuse arrival of information short horizons enhance price informativeness.

Suggested Citation

  • Xavier Vives, 1994. "Short-term Investment and the Informational Efficiency of the Market," CEPR Financial Markets Paper 0034, European Science Foundation Network in Financial Markets, c/o C.E.P.R, 77 Bastwick Street, London EC1V 3PZ..
  • Handle: RePEc:cpr:ceprfm:0034
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    References listed on IDEAS

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