Order book official

Order Book Official (OBO)
An employee of certain exchanges who executes limit orders on behalf of the membership.
Order Department ...

ORDER BOOK OFFICIAL (OBO): " Found on the CBOE, the OBO maintains a book of public orders for future execution.
ORDER ROOM " A department in a brokerage firm that receives all orders to buy or sell securities.

Order Book Official
The exchange employee in charge of keeping a book of public limit orders on exchanges utilizing the "marker-maker" system, as opposed to the "specialist system", of executing orders. See also Market-Marker and Specialist.

Order book official: An employee of the CBOE who maintains the public limit order file, which is similar to a specialist's book. Also referred to as an OBO or Board Broker, he executes limit orders for options.

Order Book Official - Is the book of public orders held for execution by the Chicago Board Options Exchange (CBOE).
Order Support System - Is the Chicago Board Options Exchange's (CBOE) automated order system.

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.

OBO - order book official (US)
OBX - Oslo Stock Exchange (Norway)
OCC - Options Clearing Corporation (US)
OCO - one cancels the other order
OFT - Office of Fair Trading (UK)
OGE - Osaka Grain Exchange (Japan)
OIE - Overseas Investment Exchange ...

The order book official or specialist keeps the public book. Market-Makers on the CBOE can see the highest bid and lowest offer at any time.

Instruction to a broker/dealer to buy, sell, deliver, or receive securities or commodities that commits the issuer of the "order" to the terms specified. See: indication, inquiry, bid wanted, offer wanted.
Order Book Official ...

order book official The member of an exchange who maintains a book of public orders and sees that the appropriate transactions are executed.

See also: Order book, Exercise price, Market Order, Federal reserve board, Option spread