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What are the types of option orders?
(1) Limit order: investors can set a price, and the transaction price shall not exceed this price when buying and shall not be lower than this price when selling. The limit order is valid on the same day, and the unfinished part can be cancelled.

(2) Orders with residual market price changed to limit price: investors do not need to set a price, but only need to make a deal at the best price that can be executed in the market at that time (the best price is to buy one or sell one). The unfinished part of the market order is converted into a limit order (declared at the transaction price).

(3) Cancellation of orders due to excess market: investors do not need to set a price, but only need to make a deal at the best price that can be executed in the market at that time (the best price is to buy one or sell one). The unfinished part of the market order will be cancelled automatically.

(4) FOK price limit declaration form: all transactions are completed immediately, otherwise the order will be cancelled automatically and the price limit declaration will be made (that is, the price needs to be set).

(5) FOK market price declaration order: all transactions are completed immediately, otherwise the order will be cancelled automatically and market price declaration will be made (that is, there is no need to set the price).