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Random, but not so much a parameterization for the returns and correlation matrix of financial time series

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  • Martins, André C.R.

Abstract

A parameterization that is a modified version of a previous work is proposed for the returns and correlation matrix of financial time series and its properties are studied. This parameterization allows easy introduction of non-stationarity and it shows several of the characteristics of the true, observed realizations, such as fat tails, volatility clustering, and a spectrum of eigenvalues of the correlation matrix that can be understood as an extension of Random Matrix Theory results. The predicted behavior of this parameterization for the eigenvalues is compared with the eigenvalues of Brazilian assets and it is shown that those predictions fit the data better than Random Matrix Theory.

Suggested Citation

  • Martins, André C.R., 2007. "Random, but not so much a parameterization for the returns and correlation matrix of financial time series," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 383(2), pages 527-532.
  • Handle: RePEc:eee:phsmap:v:383:y:2007:i:2:p:527-532
    DOI: 10.1016/j.physa.2007.02.108
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    Cited by:

    1. Sandoval, Leonidas & Franca, Italo De Paula, 2012. "Correlation of financial markets in times of crisis," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 391(1), pages 187-208.
    2. Ormerod, Paul, 2008. "Random Matrix Theory and Macro-Economic Time-Series: An Illustration Using the Evolution of Business Cycle Synchronisation, 1886-2006," Economics - The Open-Access, Open-Assessment E-Journal, Kiel Institute for the World Economy (IfW), vol. 2, pages 1-10.

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