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Efficient market hypothesis: an experimental study with uncertainty and asymmetric information

Author

Listed:
  • Mondher Bouattour

    (CERIIM & LGCO Université de Toulouse 3 Paul Sabatier)

  • Isabelle Martinez

    (TSM Research - UMR 5303 CNRS Université de Toulouse 1 Capitole Université de Toulouse 3 Paul Sabatier)

Abstract

The efficient market hypothesis has been the subject of a wide debate over the past decades. This paper investigates the market efficiency by using laboratory experiments. We ran three experimental treatments with two distinguishing dimensions: uncertainty and asymmetric information. Results show that both uncertainty and information asymmetry affect the level of market efficiency with information asymmetry having a pronounced impact. Market efficiency is reduced when the fundamental value of stocks is volatile. In addition, we find that participants under-react to information and that this under-reaction is not corrected during trading periods and prices remain stable. Classification-JEL:C92;D82;G12;G14

Suggested Citation

  • Mondher Bouattour & Isabelle Martinez, 2019. "Efficient market hypothesis: an experimental study with uncertainty and asymmetric information," Revue Finance Contrôle Stratégie, revues.org, vol. 22(4), pages 27-51, december.
    • Handle: RePEc:dij:revfcs:v:22:y:2019:i:4:p:27-51
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    Citations

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    Cited by:

    1. Merl, Robert, 2022. "Literature review of experimental asset markets with insiders," Journal of Behavioral and Experimental Finance, Elsevier, vol. 33(C).
    2. Saliha Theiri & Abdessatar Ati, 2020. "Weak Form of Efficiency Hypotheses: Empirical Modeling With Box ¨CPierce, ADF and ARCH Tests," International Journal of Financial Research, International Journal of Financial Research, Sciedu Press, vol. 11(5), pages 137-149, October.
    3. Samuel Tabot Enow, 2023. "Detecting the Herding Behaviour in the South African Stock Market and its Implications," International Journal of Economics and Financial Issues, Econjournals, vol. 13(2), pages 88-92, March.
    4. Daouda Lawa Tan Toe & Mamadou Toe & Tibi Didier Zoungrana, 2023. "Investigating the weak and semi-strong forms of Informational Efficiency on the West African Economic and Monetary Union’s Stock Exchange (BRVM) through returns predictability tests," SN Business & Economics, Springer, vol. 3(9), pages 1-27, September.
    5. Lee, Chien-Chiang & Park, Bokyung & Wang, Chih-Wei, 2023. "The effect of asymmetric information disappears: Evidence in share repurchases and market efficiency," Finance Research Letters, Elsevier, vol. 56(C).
    6. Robert Merl, 2021. "Literature Review of Experimental Asset Markets with Insiders," Working Paper Series, Social and Economic Sciences 2021-04, Faculty of Social and Economic Sciences, Karl-Franzens-University Graz.

    More about this item

    Keywords

    market efficiency; uncertainty; asymmetric information; underreaction; laboratory experiments;
    All these keywords.

    JEL classification:

    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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