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    The evolution of portfolio rules and the capital asset pricing model

    Sciubba, Emanuela (2006) The evolution of portfolio rules and the capital asset pricing model. Economic Theory 29 (1), pp. 123-150. ISSN 0938-2259.

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    The aim of this paper is to test the performance of capital asset pricing model (CAPM) in an evolutionary framework. We model an economy where a heterogeneous population of long-lived agents invest their wealth according to different portfolio rules, and prove that traders who either “believe” in CAPM and use it as a rule of thumb, or are endowed with genuine mean-variance preferences, under some very weak conditions, vanish in the long run.We show that a sufficient condition to drive CAPM or mean-variance traders’ wealth shares to zero is that an investor endowed with a logarithmic utility function enters the market.


    Item Type: Article
    School: Birkbeck Faculties and Schools > Faculty of Business and Law > Birkbeck Business School
    Depositing User: Sarah Hall
    Date Deposited: 27 Jul 2020 16:40
    Last Modified: 02 Aug 2023 18:01


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