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Volatilité des marchés financiers et allocation d’actifs

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  • Olivier Davanne

Abstract

[fre] Nous analysons dans cet article les causes de la volatilité des marchés. Nous soulignons dans un premier temps les multiples sources d'incertitude que ces derniers ont à prendre en compte. Nous insistons notamment sur les chocs qui modifient les primes de risque, c'est-à-dire sur la volatilité des rendements requis par les investisseurs sur les différentes classes d'actifs. Cette instabilité des primes de risque justifierait, même sur des marchés financiers parfaitement efficients, une volatilité assez élevée des valorisations. Mais ce constat ne conduit pas à exonérer la sphère financière de toute responsabilité. Nous soulignons la rigidité excessive des allocations d'actifs dites stratégiques, rigidité qui limite considérablement le pouvoir stabilisateur des investisseurs à long terme. Dans cet environnement, les chocs sur les « fondamentaux » ont malheureusement un impact démultiplié. . Classification JEL : F31 G11, G12, G14, G18 [eng] Financial markets volatility and asset allocations . This article discusses several causes of market volatility. We stress the numerous sources of uncertainty that markets have to deal with. In particular, the risk premia required by market participants to invest in different asset classes vary over time. As a result, even perfectly efficient financial markets would not stop asset prices volatility to be rather high. However, beside changes in economic fundamentals, financial markets probably add their own sources of volatility. We stress the excessive rigidity of investors' strategic asset allocations and we argue that long-term investors lose much of their stabilizing power as a result of this lack of flexibility. In this environment, shocks on economic fundamentals can have an exaggerated impact on asset prices. . JEL classifications : F31, G11, G12, G14, G18

Suggested Citation

  • Olivier Davanne, 2004. "Volatilité des marchés financiers et allocation d’actifs," Revue d'Économie Financière, Programme National Persée, vol. 74(1), pages 177-201.
  • Handle: RePEc:prs:recofi:ecofi_0987-3368_2004_num_74_1_5038
    DOI: 10.3406/ecofi.2004.5038
    Note: DOI:10.3406/ecofi.2004.5038
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    References listed on IDEAS

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    1. John Y. Campbell & John Cochrane, 1999. "Force of Habit: A Consumption-Based Explanation of Aggregate Stock Market Behavior," Journal of Political Economy, University of Chicago Press, vol. 107(2), pages 205-251, April.
    2. 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.
    3. Dornbusch, Rudiger, 1976. "Expectations and Exchange Rate Dynamics," Journal of Political Economy, University of Chicago Press, vol. 84(6), pages 1161-1176, December.
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    More about this item

    JEL classification:

    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • 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
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation
    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • 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
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation

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