Yes.

"Buy" refers to the judgment that the stock index will rise, that is, a position can be opened at the buying price, and the closing price is calculated based on the latest selling price;

"Sell" refers to the judgment The stock index will fall, that is, a position can be opened at the selling price, and the closing price is calculated based on the latest buying price.

Opening a position, also called position building, refers to an investor’s new purchase or sale of a certain number of stock index futures contracts. If an investor keeps the stock index futures contract until the last trading day, he must settle the futures transaction through cash delivery.

Position closing refers to the behavior of futures investors buying or selling stock index futures contracts of the same variety, quantity and delivery month as the stock index futures contracts they hold, but with opposite trading directions, in order to close stock index futures transactions. .