The price difference between what a buyer is willing to pay for a security and the what the seller is willing to accept. Specialists and market makers make their profits on the spread by purchasing the stock at the lower price and selling it at the higher one. See Bid; Ask.
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Spread Option
registered competitive market maker
front end loaded
Short leg
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North American Securities Administrators Association (NASAA)
Forex Trading
Unrealized loss
profit warning