For contracts in the futures market, buy them first so that they can be sold at a higher price in the future. The transaction that earns the difference is called "long" trading.

For contracts in the futures market, sell them first and hope to buy them back at a lower price in the future. The transaction that earns the difference is called "short" transaction.

Contract is the subject matter of futures trading. Because it is a margin trading system, even if there is no contract in hand, you can sell it first. This is called opening a short position. The repurchase operation of this kind of transaction in the future is called liquidation!

Conversely, those who buy the contract first are called bulls. .....