Open

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Related to opened: opened up

Open

Used in the context of general equities. Having either buy or sell interest at the indicated price level and side of a preceding trade. "Open on the buy/sell side" means looking for buyers/sellers (for someone who is a seller/buyer). Antithesis of clean.

Open

1. The time trading begins on an exchange. This is important to matters like a security's opening price or opening bid. See also: Close.

2. An order to buy or sell a security that has not yet been filled. Some orders are only open for a certain amount of time, while some remain open until they are filled. See also: IOC, GTC.
References in classic literature ?
In the mean while Hester Dethridge opened Geoffrey's bedroom door and went in.
This done, she opened the upper part of her dress, and, slipping her fingers into a secret pocket hidden in the inner side of her stays, produced from it some neatly folded leaves of thin paper.
Nevertheless, he concluded that the man must have had a key in his hand, and must have opened one of the many house-doors and gone in.
The sound of Mistress Affery cautiously chaining the door before she opened it, caused them both to look that way.
Then a window was opened and when they saw and heard they were convinced.