Jiang, J.; Ma, K.; Cai, X. - In: Physica A: Statistical Mechanics and its Applications 375 (2007) 1, pp. 274-280
We observe that the distribution of the relative return, describing the variation of a certain currency, of 74 global currencies obeys a power-law. By using the random matrix theory we find that the distribution of eigenvalues of correlation matrix of relative return also follows a power-law....