Forced liquidation refers to the trading behavior that one party uses the advantage of funds or warehouse receipts to guide the unilateral operation of the market, resulting in continuous losses of the other party and finally has to close the position. Generally divided into two forms: more empty positions and more empty positions. More short positions: market manipulators use capital or physical advantages to sell a large number of futures contracts in the futures market. It makes its short position greatly exceed the ability of many parties to undertake physical goods, which makes the futures market price drop sharply, forcing speculative bulls to sell contracts at low prices and admit losses, or be fined for breach of contract because of their financial strength, thus making rich profits.