Title of article :
Free Lévy matrices and financial correlations
Author/Authors :
Zdzis aw Burda، نويسنده , , Jerzy Jurkiewicz، نويسنده , , Maciej A. Nowak، نويسنده , , Gabor Papp، نويسنده , , Ismail Zahed، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Abstract :
We consider a covariance matrix composed of asymmetric and free random Lévy matrices. We use the results of free random variables to derive an algebraic equation for the resolvent and solve it to extract the spectral density. For an appropriate choice of asymmetry and Lévy index the free eigenvalue spectrum is in remarkable agreement with the one obtained from the covariance matrix of the SP500 financial market. Our results are of interest to a number of stochastic systems with power law noise.
Journal title :
Physica A Statistical Mechanics and its Applications
Journal title :
Physica A Statistical Mechanics and its Applications