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Rationale Marktübertreibungen im Zusammenhang der aktuellen Finanzmarktkrise

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  • Thorsten Klug
  • Hermann Locarek-Junge
  • Max Mihm

Abstract

The paper deals with the motives of people to invest in overvalued markets. We resort to the concepts of behavioural fi nance to describe the most important factors. Based on these fi ndings we deduct measures to avoid misjudgement of markets participants. As Bikhchandani and Sharma (2000) show, the concept of herd behaviour plays a decisive role in explaining exuberance in markets. There are incentives for investors, money managers and analysts to imitate other's actions. Furthermore, conservatism as well as heuristics like representativeness may also lead to a confi rmation of prevailing trends. Another driver of misjudgement is the usage of heuristics like representativeness. The authors consider that the provision of information may substantially contribute to the reduction of misjudgement and exuberance in markets. Both availability and quality of information are important. Another approach aims at the regulation of bank lending, which should be limited particularly during a booming economy. Der Untersuchungsgegenstand der Arbeit ist die Darstellung der wichtigsten Anlegermotive bei Marktübertreibungen. Es wird dabei auf Konzepte der verhaltensorientierten Kapitalmarktforschung zurückgegriffen. Basierend auf den gewonnenen Erkenntnissen werden Lösungsansätze zur Vermeidung von Marktübertreibungen abgeleitet. Untersuchungen, beispielsweise durch Bikhchandani und Sharma (2000), haben gezeigt, dass Herdenverhalten eine wichtige Rolle bei der Erklärung von Preisübertreibungen spielt. Dabei kann es rational sein, sich konform zur Masse der Marktteilnehmer zu verhalten. Neben dem Konzept des Herdenverhaltens kann Konservatismus unter Marktteilnehmern zur Bestätigung vorherrschender Trends beitragen. Heuristiken werden angewandt, um komplexe Sachverhalte zu vereinfachen. Insbesondere die Repräsentativitätsheuristik kann zu einer Verstärkung bestehender Preisübertreibungen führen. Die Autoren sind der Ansicht, dass vor allem eine Verbesserung der Informationsbasis zur Reduzierung von Fehleinschätzungen durch Marktteilnehmer beitragen kann. Sowohl die Verfügbarkeit als auch die Qualität der Informationen spielen dabei eine Rolle. Ein weiterer Lösungsansatz betrifft die Risikoeinstellung und Kreditvergabe der Banken. In Boomphasen sollte das Risiko eines Crashs berücksichtigt werden.

Suggested Citation

  • Thorsten Klug & Hermann Locarek-Junge & Max Mihm, 2009. "Rationale Marktübertreibungen im Zusammenhang der aktuellen Finanzmarktkrise," Vierteljahrshefte zur Wirtschaftsforschung / Quarterly Journal of Economic Research, DIW Berlin, German Institute for Economic Research, vol. 78(1), pages 25-39.
    • Handle: RePEc:diw:diwvjh:78-1-3
    DOI: 10.3790/vjh.78.1.25
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    References listed on IDEAS

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    1. Bikhchandani, Sushil & Hirshleifer, David & Welch, Ivo, 1992. "A Theory of Fads, Fashion, Custom, and Cultural Change in Informational Cascades," Journal of Political Economy, University of Chicago Press, vol. 100(5), pages 992-1026, October.
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    More about this item

    Keywords

    Financial crisis; effi cient markets;

    JEL classification:

    • G1 - Financial Economics - - General Financial Markets
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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