Used in the context of general equities. Remains to buy or sell of a previously entered order after a report of partial execution has been given. If I had told the floor broker to buy 20M IBM @ $115, and he later bought 6M at this price, his report would be "You bought 6M IBM @ $115, leaves 14."
LEAVES
Meaning of LEAVES in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012