Order Book Official

Definition of 'Order Book Official'


A trading floor participant responsible for maintaining a list of public market or limit orders of a specific option class using the "market-marker" system of executing orders.

Investopedia explains 'Order Book Official'


The term can also sometimes be used in reference to a current list of public market or limit orders for a given exchange. For example, a list of specific public orders awaiting execution on the Chicago Board Options Exchange could be referred to as the "order book official".



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