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Portfolio Complexity and Herd Behavior: Evidence from the German Mutual Fund Market

Author

Listed:
  • Alexander Franck

    (Justus Liebig University Giessen, Department of Financial Services, Licher Straße 74, D-35394 Giessen)

  • Andreas Walter

    (Justus Liebig University Giessen, Department of Financial Services, Licher Straße 74, D-35394 Giessen)

Abstract

We examine the herd behavior among equity funds in Germany based on a large sample of funds from 2000 to 2009. We show that a large portion of the detected herding can be explained by identical trading among funds of the same investment company. However, we also find statistically significant stock herding among funds belonging to different fund families. In contrast to existing herding studies which analyze herd behavior within a purely national stock environment, we investigate mutual fund herding in international stocks. We contribute to the literature by analyzing the impact of portfolio complexity on herd behavior. We find the most pronounced levels of herding for funds choosing their portfolio stocks from a broad, international and therefore complex investment universe. Further, we approximate a fund’s portfolio complexity by its size and find high levels of herding among the biggest funds. To analyze the herd behavior of individual funds, we introduce a new and intuitive way to assign levels of herding to funds according to their trading activity within a given period. We show that managers differentiate between buy-herding and sell-herding and that individual funds exhibit similar herding intensities within a given and a succeeding period.

Suggested Citation

  • Alexander Franck & Andreas Walter, 2012. "Portfolio Complexity and Herd Behavior: Evidence from the German Mutual Fund Market," Credit and Capital Markets, Credit and Capital Markets, vol. 45(3), pages 343-371.
  • Handle: RePEc:kuk:journl:v:3:y:2012:i:3:p:343-371
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    Cited by:

    1. Alexander Franck & Andreas Walter & Johannes Witt, 2013. "Momentum strategies of German mutual funds," Financial Markets and Portfolio Management, Springer;Swiss Society for Financial Market Research, vol. 27(3), pages 307-332, September.

    More about this item

    Keywords

    Herding behavior; behavioral finance; asset allocation; mutual funds;

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G23 - Financial Economics - - Financial Institutions and Services - - - Non-bank Financial Institutions; Financial Instruments; Institutional Investors

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