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Obsolete Securities	Bonds that have matured and have been retired and canceled; stocks or bonds of corporations that are abandoned or defunct or that have temporally suspended operations without actually dissolving
Odd Lot	On stock exchanges, a smaller unit of trading than the standard unit of trading, known as a board, full, or round lot
Odd Lot Dealers	The highly specialized business of providing a market at all times for odd lots of stocks on the New York Stock Exchange, which originated as far back as 1871
Odd Lot Trading	Buying or selling in other than the established unit or round lot
Off	A stock market expression indicating prices below preceding level; without, e.g., dividend off refers to without dividend
Offer	A bid; a price named at which one is willing to buy; the price at which one is willing to sell
Oligopoly	A market condition in which relatively few firms produce identical or similar products
Opening Price	The price at which the first sale for the day of any security is made
Open Order	An order to buy or sell a security that remains in effect until it is either executed or canceled by the customer
Open Outcry	A reference to markets or exchanges where orders are placed and accepted using gestures and shouts
Option	The privileges of buying and/or selling specified securities or commodities in specified amounts, at specified prices, and for a specified duration of time
Options Activity Ratio	A speculative index based on the level of options activity compared with the volume of trading in the stock market
Orders	Instructions to a broker to buy or sell securities or commodities
Ordinary Shares	The English equivalent of US common stock, classified into preferred shares and deferred shares
Outstanding	Not presented for payment; stock shares that have been authorized and held by shareholders
Over	A prefix signifying higher, an amount in excess of
Overissue	An issue of stock or bonds by a corporation in excess of the amount authorized
Oversubscription	A condition that exists when the aggregate of subscriptions contracting to buy an issue of securities offered to the public exceeds the amount of the issue
Over-The-Counter Market	A major securities market subject to monitoring and on-site inspection and examination by the National Association of Securities Dealers, Inc. TOP

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