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The ownership of a security or derivative, or the state of having bought one or the other. A long position brings with it the right to coupon payments or dividends attached to the security or derivative. Informally, one who owns 100 shares of a stock is said to be "long 100 of the stock." Likewise, an investor who has bought (or holds) an option is said to be "long the option" because he/she has the right to exercise the option at a later date. See also: Short position, Close a position.
See long position.