Used in the context of general equities. Market indication , willingness to go both ways ( buy or sell) at the mentioned volume and market . Print , up on the ticker tape , confirming that the trade has been executed . Telephone board refers to the upper (versus the lower) board.
UP
Meaning of UP in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012