There is such a concept in the political economy of proletariat developed in due time by Marx - deviation of a market price from the cost. This deviation pertains to any economic system based ON ELEMENTS of market satisfaction of needs. But if in case of weak and undeveloped market system deviations can be put in order rather quickly, in case when the system is very powerful and dynamical - and in general: the more dynamic the system is, - the period of deviation of the market price from the cost, as practice of modern capitalist development shows, is being extended. However in any case all ends in regulation which is felt as crisis. Crisis is directly connected to necessity to harmonize the cost and market prices. The longer deviation of prices from the cost lasts, the more powerful crisis regulation is then. What is deviation of the price from the cost?