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Common scaling behavior in finance and macroeconomics

  • Focus Section on Applications of Physics in Financial Analysis
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Abstract

In order to test whether scaling exists in finance at the world level, we test whether the average growth rates and volatility of market capitalization (MC) depend on the level of MC. We analyze the MC for 54 worldwide stock indices and 48 worldwide bond indices. We find that (i) the average growth rate \(\langle\) r \(\rangle\) of the MC and (ii) the standard deviation \(\sigma(r)\) of growth rates r decrease both with MC as power laws, with exponents \(\alpha_w\) = 0.28 ± 0.09 and \(\beta_w\) = 0.12 ± 0.04. We define a stochastic process in order to model the scaling results we find for worldwide stock and bond indices. We establish a power-law relationship between the MC of a country’s financial market and the gross domestic product (GDP) of the same country.

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Authors and Affiliations

  1. Center for Polymer Studies and Department of Physics, Boston University, Boston, MA, 02215, USA

    B. Podobnik, A. M. Petersen & H. E. Stanley

  2. Faculty of Civil Engineering, University of Rijeka, 51000, Rijeka, Croatia

    B. Podobnik

  3. Zagreb School of Economics and Management, 10000, Zagreb, Croatia

    B. Podobnik

  4. Department of Physics, University of Zagreb, 10000, Zagreb, Croatia

    D. Horvatic

  5. Assia Research Center, University of St. Gallen, 9000, St. Gallen, Switzerland

    M. Njavro

Authors
  1. B. Podobnik
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  2. D. Horvatic
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  3. A. M. Petersen
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  4. M. Njavro
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  5. H. E. Stanley
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Corresponding authors

Correspondence to B. Podobnik, D. Horvatic, A. M. Petersen, M. Njavro or H. E. Stanley.

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Podobnik, B., Horvatic, D., Petersen, A. et al. Common scaling behavior in finance and macroeconomics. Eur. Phys. J. B 76, 487–490 (2010). https://doi.org/10.1140/epjb/e2009-00380-3

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  • DOI: https://doi.org/10.1140/epjb/e2009-00380-3

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