A stock is something that you think will go up, so you buy it, and if it does, you sell it for profit. This stock has fallen, so you will lose money if you want to sell it.
Futures are a bit like stocks. That is, you predict that the price of one of your varieties will rise, so you buy it. If it goes up, it can be sold at a profit. If you predict that the price of a certain variety will fall, sell it. If it falls, you can also make a profit by buying. Stocks are one-way transactions, and only buying up can make money, while futures are two-way transactions, and both buying up and selling short can make money, so futures are more flexible. Stocks can be closed on the second day of buying, and futures can be closed on the second day of buying. One dollar for stock speculation can only be used as one dollar, and futures have leverage ratio and margin system. If the leverage ratio is 10, one dollar of futures can be used as ten dollars, and the loss is not enlarged by 10 times. The loss can only be 10 dollars, depending on your own choice, but its maximum amount is your margin.