The individual principles of the cyclical course of economic processes in modern economic conditions were considered. The existing theories of economic (business) cycles were analyzed. The financial economy was defined as a component of the security of financial flows. The factors of strengthening (weakening) of the interaction of financial flows in the economy and their safe movement support were characterized. The effect of multiplication of financial flows for individual stages of the economic cycle was disclosed. The specifics of complex security of the movement of financial flows in industrial and financial economies were studied. A comparative characteristic of industrial and financial economies was carried out according to a number of criteria.