Commodity derivatives, such as the futures market, enable producers and consumers of energy to manage (or hedge) their exposure to adverse price movements in the future, thereby enabling them to plan for the future with certainty regarding the price they will receive or pay for the commodity in question.
Any measure to restrict those engaged in the operation of the oil industry, i.e. producers and consumers, from trading in oil futures would limit the ability of producers and consumers to hedge effectively against adverse price movements in the future, hindering efficient business planning and risk management.