In this paper we investigated the possibility of application a Stable aggregate currency unit of account consisting of four simple currencies – euro, pound, dollar, yen for analyze the dynamics of a exchange value of the aggregated commodity, consisting of four simple commodities – silver, gold, platinum, palladium. It has been shown that the variability of exchange value baskets which is measured by the standard deviation from one of corresponding the multiplicative monetary indices less than the same measure the variability of exchange value of national currencies and some precious metals. It was also investigated the dynamics of price a stable aggregate of precious metals, which is measured in units of stable aggregates of four solid currencies.