IDEAS home Printed from https://ideas.repec.org/a/prs/reveco/reco_0035-2764_1992_num_43_4_409384.html
   My bibliography  Save this article

Contagion des opinions et fonctionnement des marchés financiers

Author

Listed:
  • André Orléan

Abstract

[eng] Contagion of opinions in financial markets . . Many practitioners have underlined the role played by contagion processes in the generation not only of speculative bubbles but also of excess volatility. The following text shows the truth of such a point of view. Our idea is that, at the origin of interpersonal influences, we find the rational use of the information conveyed by prices. When the investors' confidence in the prevailing methods of fundamental evaluation is too low, the process of interaction becomes non-ergodic and gives rise to speculative bubbles. The model we use to demonstrate this result is very close to the Ising model. [fre] Contagion des opinions et fonctionnement des marchés financiers. . De nombreux praticiens de la finance ont souligné le rôle joué par les phénomènes de contagion, non seulement dans la formation des bulles, mais également dans l'existence d'une volatilité excessive des cours. Le présent texte démontre la pertinence de ce point de vue. Dans un premier temps, on souligne que l'utilisation rationnelle du prix, par l'ensemble des opérateurs, comme source complémentaire d'informations, est à la base même des phénomènes de contagion. Dans un second temps, on étudie cette dynamique d'interactions. On démontre que si les opérateurs ont une trop faible confiance dans les méthodes d'évaluation fondamentale, le processus d'interaction est non ergodique et donne naissance à des bulles spéculatives.

Suggested Citation

  • André Orléan, 1992. "Contagion des opinions et fonctionnement des marchés financiers," Revue Économique, Programme National Persée, vol. 43(4), pages 685-698.
  • Handle: RePEc:prs:reveco:reco_0035-2764_1992_num_43_4_409384
    as

    Download full text from publisher

    File URL: https://www.persee.fr/doc/reco_0035-2764_1992_num_43_4_409384
    Download Restriction: Data and metadata provided by Persée are licensed under a Creative Commons "Attribution-Noncommercial-Share Alike 3.0" License http://creativecommons.org/licenses/by-nc-sa/3.0/

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. repec:hrv:faseco:33077905 is not listed on IDEAS
    2. De Long, J Bradford & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1990. "Noise Trader Risk in Financial Markets," Journal of Political Economy, University of Chicago Press, vol. 98(4), pages 703-738, August.
    3. Shleifer, Andrei & Summers, Lawrence H, 1990. "The Noise Trader Approach to Finance," Journal of Economic Perspectives, American Economic Association, vol. 4(2), pages 19-33, Spring.
    4. Shiller, Robert J, 1981. "Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends?," American Economic Review, American Economic Association, vol. 71(3), pages 421-436, June.
    5. Robert J. Shiller, 1987. "Investor Behavior in the 1987-10 Stock Market Crash: Survey Evidence," Cowles Foundation Discussion Papers 853, Cowles Foundation for Research in Economics, Yale University.
    6. Topol, Richard, 1991. "Bubbles and Volatility of Stock Prices: Effect of Mimetic Contagion," Economic Journal, Royal Economic Society, vol. 101(407), pages 786-800, July.
    7. Grossman, Sanford J, 1976. "On the Efficiency of Competitive Stock Markets Where Trades Have Diverse Information," Journal of Finance, American Finance Association, vol. 31(2), pages 573-585, May.
    8. Robert J. Shiller, 1987. "Investor Behavior in the October 1987 Stock Market Crash: Survey Evidence," NBER Working Papers 2446, National Bureau of Economic Research, Inc.
    9. French, Kenneth R. & Roll, Richard, 1986. "Stock return variances : The arrival of information and the reaction of traders," Journal of Financial Economics, Elsevier, vol. 17(1), pages 5-26, September.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Irène Hors, 1995. "Des modèles de transition de phase en économie ?," Revue Économique, Programme National Persée, vol. 46(3), pages 817-826.
    2. Bronka Rzepkowski, 2001. "Heterogeneous Expectations, Currency Options and the Euro / Dollar Exchange Rate," Working Papers 2001-03, CEPII research center.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:prs:reveco:reco_0035-2764_1992_num_43_4_409384. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Equipe PERSEE). General contact details of provider: https://www.persee.fr/collection/reco .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.