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Efficient market hypothesis and fraud on the market theory a new perspective for class actions

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  • Jovanovic, Franck
  • Andreadakis, Stelios
  • Schinckus, Christophe

Abstract

Following recent judgment of the Supreme Court of US (June 2014), several commentators had declared that “Securities class actions are here to stay” (insidecounsel.com—September 2014, 11). This paper provides a critical perspective on this judgment, which “implicates substantive issues at the intersection of economic theory, financial markets, and securities regulation” (128Harv. L. Rev. 291 2014–2015, 291), and shows that we must be much more careful. This recent judgment is based on the Fraud on the Market Doctrine, which was introduced in 1973 in order to preserve the class action procedure in securities fraud litigation. The characteristic of the Fraud on the Market Doctrine is to have been structured from one of the most popular financial theory: Efficient Market Hypothesis. In this paper, by analysing the implementation of the Efficient Market Hypothesis in Fraud on the Market Theory, we argue that if the Supreme Court had to take position for a second time about the Fraud on the Market Doctrine it is due to the practical difficulties inherited from Efficient Market Hypothesis and that have raised several problems to the US courts, including the Supreme Court. This issue is illustrated by the definition of Efficient Market Hypothesis lawyers used (“most” vs “all”/“fully”). As this paper shows, if “Securities class actions are here to stay”, the opportunity to open such a class action is strongly reduced in the facts.

Suggested Citation

  • Jovanovic, Franck & Andreadakis, Stelios & Schinckus, Christophe, 2016. "Efficient market hypothesis and fraud on the market theory a new perspective for class actions," Research in International Business and Finance, Elsevier, vol. 38(C), pages 177-190.
    • Handle: RePEc:eee:riibaf:v:38:y:2016:i:c:p:177-190
    DOI: 10.1016/j.ribaf.2016.04.003
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    References listed on IDEAS

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    2. Mesagan Peter Ekundayo & Amadi Nkem Agatha, 2017. "The Efficiency Market Theory: A Case of Commercial Banks Stocks in Nigeria," Ovidius University Annals, Economic Sciences Series, Ovidius University of Constantza, Faculty of Economic Sciences, vol. 0(2), pages 583-587, December.
    3. Mohammad Arashi & Mohammad Mahdi Rounaghi, 2022. "Analysis of market efficiency and fractal feature of NASDAQ stock exchange: Time series modeling and forecasting of stock index using ARMA-GARCH model," Future Business Journal, Springer, vol. 8(1), pages 1-12, December.
    4. Anderloni, Luisa & Tanda, Alessandra, 2017. "Green energy companies: Stock performance and IPO returns," Research in International Business and Finance, Elsevier, vol. 39(PA), pages 546-552.
    5. Jovanovic, Franck & Schinckus, Christophe, 2017. "Econophysics and Financial Economics: An Emerging Dialogue," OUP Catalogue, Oxford University Press, number 9780190205034.

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