Futures are not monitored. The reasons for the decline when buying up are as follows: when the number of sellers in the market increases and the number of buyers decreases, the price will fall. If investors expect the market to rise when buying futures contracts, but the actual situation has fallen, it may be because investors' expectations are not in line with the actual market situation. In addition, operational errors may also lead to price decline, such as improper buying timing and excessive buying quantity.