Abstract
The time series of gold price in the Indian market and the global consumer price index for the period of January 1985 to June 2013 are analyzed in terms of the multifractal detrended fluctuation analysis (MF-DFA). Multifractal variables, such as the generalized Hurst exponent, the multifractal mass exponent, the singularity spectrum, are extracted for both the series. Special emphasis is given on the possible source(s) of correlations in these series. The multifractal results are fitted to the generalized binomial multifractal model consists of only two parameters. Our analysis show that the multifractal nature of the Indian gold market time series and the global consumer price index series is due to both the long-range temporal correlation and the fat-tailed probability density function of the values. Surprisingly, the series are well described by the two-parameter binomial multifractal model used.
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