Negative oil price refers to the price of crude oil, not the negative price of crude oil. The phenomenon of negative oil price is that the cost of international crude oil in the process of transportation and storage has exceeded the value of crude oil itself due to the COVID-19 epidemic, which leads to the unprofitable sales of crude oil. Negative oil price is essentially a phenomenon of futures price changes, and futures refer to standardized tradable contracts with some popular products such as cotton, soybeans and oil. And financial assets such as stocks and bonds. The subject matter of futures can be a commodity (such as gold, crude oil and agricultural products) or a financial instrument.