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Prévisibilité des rentabilités boursières. Une étude empirique du marché boursier français sur données intraquotidiennes

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  • Christine Stachowiak

Abstract

[eng] The aim of this paper is to analyse the weak-form efficiency of the French stock market , by examining whether past returns make it possible to determine future returns , taking the period from January 1999 to December 2000 . We therefore concentrate on using intraday data for an empirical examination of whether the returns on stocks in the CAC40 and MIDCAC are auto-correlated . Three tests are applied : the Box-Pierce and heteroscedasticity-adjusted Box-Pierce test , the runs test and the variance-ratio test . Our results show that it is impossible to predict future returns from past returns , which is consistent with the weak-form market efficiency hypothesis . [fre] Ce papier a pour objet d ’ étudier l ’ efficience au sens faible du marché boursier français , en analysant si les rentabilités passées permettent de déterminer les rentabilités futures sur la période allant de janvier 1999 à décembre 2000 . Nous nous attachons ainsi à déterminer empiriquement , sur données intraquotidiennes , si les rentabilités des valeurs appartenant au CAC40 et au MIDCAC sont autocorrélées . Trois tests sont mis en œuvre , les tests de Box-Pierce et Box-Pierce corrigé de l ’ hétéroscédasticité , le test des runs ainsi que le test du rapport de variances . Nos résultats montrent qu ’ il est impossible de prévoir les rentabilités futures à partir des rentabilités passées , ce qui est en accord avec l ’ hypothèse d ’ efficience au sens faible .

Suggested Citation

  • Christine Stachowiak, 2004. "Prévisibilité des rentabilités boursières. Une étude empirique du marché boursier français sur données intraquotidiennes," Économie et Prévision, Programme National Persée, vol. 166(5), pages 71-85.
  • Handle: RePEc:prs:ecoprv:ecop_0249-4744_2004_num_166_5_7382
    DOI: 10.3406/ecop.2004.7382
    Note: DOI:10.3406/ecop.2004.7382
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    Cited by:

    1. Boya, Christophe M., 2019. "From efficient markets to adaptive markets: Evidence from the French stock exchange," Research in International Business and Finance, Elsevier, vol. 49(C), pages 156-165.

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