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Specialist A market professional who manages the two-way auction market trading in the specific securities he or she has been assigned. He or she works for a specialist firm, which is an independent company in the business of trading listed securities. (Click here for a list of specialist firms at the NYSE.) Specialists perform four critical roles: auctioneer, agent, catalyst, and principal.
Specialist as Auctioneer
As auctioneer, the specialist continually shows the best bids and offers throughout the trading day. These quotes are disseminated electronically through the NYSE quote and other market-data systems that transmit the information instantly worldwide. The specialist maintains order in the crowd and interacts with other agents representing customers. Specialists make sure all marketable orders are executed regardless of their size.
Specialist as Agent
As agent, the specialist accepts limit orders from investors, either electronically or via a broker, and executes trades on their behalf when the share price reaches the investor's limit. As agent, a specialist assumes the same fiduciary responsibility as a broker.
Specialist as Catalyst
As catalyst, the specialist is the contact point between brokers with buy orders and brokers with sell orders. Specialists bring together buyers and sellers when necessary. For example, if a buy or sell order can't be matched with other orders, the specialist will alert investors who were recently active in the stock to see if they can be brought into that transaction.
Specialist as Principal
As principal, the specialist must buy and sell stock against the market trend to cushion temporary imbalances and avoid unreasonable price variationsâcommitting capital to add liquidity when it is needed. If buy orders temporarily outpace sell orders in a specialist's assigned stocks - or if sell orders outpace buy orders - the specialist is required to use their firm's own capital to minimize the imbalance. This is done by buying or selling against the trend of the market, until a price is reached at which public supply and demand are once again in balance. Specialists, however, cannot trade ahead of public orders. The NYSE operates under strict public-order priority that always puts the customer first.