  The miltifractal properties and scaling behaviour of the exchange rate
variations of the Iranian rial against the US dollar from a daily perspective
is numerically investigated. For this purpose the multifractal detrended
fluctuation analysis (MF-DFA) is used. Through multifractal analysis, the
scaling exponents, generalized Hurst exponents, generalized fractal dimensions
and singularity spectrum are derived. Moreover, contribution of two major
sources of multifractality, that is, fat-tailed probability distributions and
nonlinear temporal correlations are studied.
