& ampnbsp In addition, crude oil is an essential product for industrial production and an important raw material for gasoline, diesel oil and lubricating oil that people use daily. Therefore, the fluctuation of crude oil price is closely related to economic development. At present, crude oil is traded in the form of futures contracts, and the oil price index refers to the price of crude oil futures contracts; The specific operation of crude oil futures is that both parties sign an oil futures contract in advance, and on the specified date, the buyer can buy from the seller at the price stipulated in the contract. & ampnbsp that is to say, from the perspective of national economy, for crude oil importing countries, falling oil prices can reduce local industrial production costs, improve the profits of local enterprises, and encourage enterprises to expand, thereby increasing local employment and promoting GDP growth. On the contrary, for oil-producing countries, falling oil prices may lead to a decrease in national income and put the government under financial pressure.