Capital distribution and portfolio performance in the mean-field Atlas model

Benjamin Jourdain and Julien Reygner
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Benjamin Jourdain: CERMICS, INRIA Paris-Rocquencourt
Julien Reygner: CERMICS, LPMA

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Abstract: We study a mean-field version of rank-based models of equity markets such as the Atlas model introduced by Fernholz in the framework of Stochastic Portfolio Theory. We obtain an asymptotic description of the market when the number of companies grows to infinity. Then, we discuss the long-term capital distribution. We recover the Pareto-like shape of capital distribution curves usually derived from empirical studies, and provide a new description of the phase transition phenomenon observed by Chatterjee and Pal. Finally, we address the performance of simple portfolio rules and highlight the influence of the volatility structure on the growth of portfolios.

Date: 2013-12, Revised 2014-08
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Persistent link: https://EconPapers.repec.org/RePEc:arx:papers:1312.5660

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