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High-Speed Natural Selection in Financial Markets with Large State Spaces

Author

Listed:
  • Fedyk, Yuriy

    (Olin School of Business)

  • Walden, Johan

    (Haas School of Business)

Abstract

Recent research has suggested that natural selection in financial markets may be a very slow process, taking hundreds of years. We show in a general equilibrium model that it may be much faster in markets with large state spaces. In many cases, the time it takes to wipe out irrational investors is inversely proportional to the number of stocks in the market, i.e., if it takes about 500 years with one stock, it takes about one year with 500 stocks. Thus, theoretically, natural selection can be very efficient even when there is high market uncertainty. The speed of the natural selection process is a known function of irrational investors' sentiment and of the real characteristics of the stock market. According to a calibration to U.S. stock data, it takes about fifty years for an irrational investor to be wiped out. This is in line with studies of individual investor underperformance.

Suggested Citation

  • Fedyk, Yuriy & Walden, Johan, 2007. "High-Speed Natural Selection in Financial Markets with Large State Spaces," SIFR Research Report Series 52, Institute for Financial Research.
    • Handle: RePEc:hhs:sifrwp:0052
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    References listed on IDEAS

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    Cited by:

    1. Hongjun Yan, 2008. "Natural Selection in Financial Markets: Does It Work?," Management Science, INFORMS, vol. 54(11), pages 1935-1950, November.
    2. Hongjun Yan, 2008. "Natural Selection in Financial Markets: Does It Work?," Management Science, INFORMS, vol. 54(11), pages 1935-1950, November.
    3. Kogan, Leonid & Ross, Stephen A. & Wang, Jiang & Westerfield, Mark M., 2017. "Market selection," Journal of Economic Theory, Elsevier, vol. 168(C), pages 209-236.

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    More about this item

    Keywords

    Asset pricing; Market selection hypothesis; Natural selection;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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