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On a class of diverse market models

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  • Andrey Sarantsev

Abstract

A market model in Stochastic Portfolio Theory is a finite system of strictly positive stochastic processes. Each process represents the capitalization of a certain stock. If at any time no stock dominates almost the entire market, which means that its share of total market capitalization is not very close to one, then the market is called diverse. There are several ways to outperform diverse markets and get an arbitrage opportunity, and this makes these markets interesting. A feature of real-world markets is that stocks with smaller capitalizations have larger drift coefficients. Some models, like the volatility-stabilized model, try to capture this property, but they are not diverse. In an attempt to combine this feature with diversity, we construct a new class of market models. We find simple, easy-to-test sufficient conditions for them to be diverse and other sufficient conditions for them not to be diverse. Copyright Springer-Verlag Berlin Heidelberg 2014

Suggested Citation

  • Andrey Sarantsev, 2014. "On a class of diverse market models," Annals of Finance, Springer, vol. 10(2), pages 291-314, May.
    • Handle: RePEc:kap:annfin:v:10:y:2014:i:2:p:291-314
    DOI: 10.1007/s10436-013-0245-2
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    References listed on IDEAS

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    More about this item

    Keywords

    Stochastic Portfolio Theory; Diverse markets; Arbitrage opportunity; Feller’s test; G10;
    All these keywords.

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)

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