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Applying cyclic decomposition method for searching latent periodicity in the financial time series

A method of the cyclic decomposition with runs test for searching latent periodicity in the financial time series has been developed. The method together with the method of information decomposition was applied to search periodicity in exchange rates, rates of major financial indices and stock prices. The presence of frequency equal to 7 days in financial ranks analyzed was demonstrated. The sources of periodicity in the financial ranks are discussed.