O&M is an acronym for either Operations & Maintenance or Operations & Management.
MARKET MAKERS is one of the major differences between The NASDAQ Stock Market and other major markets in the U.S. is NASDAQ's structure of competing Market Makers. Market Makers are NASDAQ member firms that use their own capital, research, retail and/or systems resources to represent a stock and compete with each other to buy and sell the stocks they represent. Each Market Maker competes for customer order flow by displaying buy and sell quotations for a guaranteed number of shares. Once an order is received, the Market Maker will immediately purchase for or sell from its own inventory, or seek the other side of the trade until it is executed, often in a matter of seconds.
MODIFIED ACCELERATED COST RECOVERY SYSTEM (MACRS) is a system used in accounting to define the rate and method under which a fixed asset will be depreciated for tax purposes.
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