In theory, there is no insider trading in futures, and futures prices and spot prices interact. It is normal market behavior that the spot plummets and short futures to make money. The so-called insider, that is, there is a banker to pull up or suppress the market. At this time, if the banker leaks the news to other investors, it is insider trading. However, under normal circumstances, the banker will not inform others of his operation intention, because telling others is equivalent to giving money to others, which may be in two situations: 1, profit transfer, bribing officials or other purposes. 2. When the price reaches a certain level, take a walk and let others pick up the goods and deliver them themselves.