1, different definitions: the closing price refers to the actual closing price paid by investors when closing their positions, that is, the closing price. The bid price refers to the price at which the futures price is lower than the issue price, which belongs to the price determined by the issuing enterprise when it sells futures in the market, and is also called premium.

2. Different functions: The closing price, whether in securities trading or futures trading, is the actual transaction price determined by buyers and sellers at the completion of the transaction. Water price is mainly used for futures trading, which is a price determined by the issuing company when it sells futures in the market. It is used to lock the futures price and ensure the sales and trading of futures.