The article reviews the issues of exchange trading in its systemic connection with other forms of intermediary services for organizing the purchase of goods, works and services and their sale in the context of the possibility and necessity of using them for the implementation of corporate and government purchases and sales. The concept of fairness of trading, including exchange trade, and fairness of the trade price are considered as characteristics determined on the basis of the indicator of compliance with the procedure and rules for establishing the results of trades and the price established based on the results of trades.