It may be the system itself. Try landing again the next day. Before the physical delivery expires, investors can voluntarily decide to buy and sell futures contracts according to market conditions and personal wishes. However, investors (bulls or bears) hold futures contracts without performing reverse operations (selling or buying) with the same delivery month and quantity. This operation is called "holding positions". This is the narrow definition of position, while the broad definition extends to the holding of stocks, funds, bonds and so on. , which can be understood as holding all derivative financial instruments.