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In securities trading, an order book contains the list of buy orders and the list of sell orders. For each entry it must keep among others, some means of identifying the party (even if this identification is obscured, as in a dark pool), the number of securities and the price that the buyer or seller are bidding/asking for the particular security.
The stock exchange electronic trading system (SETS) is an electronic order-driven system for trading the UK bluechip stocks, including FTSE 100 and FTSEurofirst 300 stocks. The SETS order book matches buy and sell orders on a price/time priority. On SEAQ, all buys and sells go through a market maker who acts as an intermediary.
The income of a market maker is the difference between the bid price, the price at which the firm is willing to buy a stock, and the ask price, the price at which the firm is willing to sell it. It is known as the market-maker spread, or bid–ask spread. Supposing that equal amounts of buy and sell orders arrive and the price never changes ...
For example, if a stock price has a bid price of $100 and an ask price of $100.05, the bid-ask spread would be $0.05. ... rather than placing a market order that is subject to the pricing at the ...
A bid price is the highest price that a buyer (i.e., bidder) is willing to pay for some goods. It is usually referred to simply as the "bid". In bid and ask, the bid price stands in contrast to the ask price or "offer", and the difference between the two is called the bid–ask spread. An unsolicited bid or purchase offer is when a person or ...
The bid–ask spread (also bid–offer or bid/ask and buy/sell in the case of a market maker) is the difference between the prices quoted (either by a single market maker or in a limit order book) for an immediate sale and an immediate purchase for stocks, futures contracts, options, or currency pairs in some auction scenario.
When the stop price is reached, a stop order becomes a market order. A buy-stop order is entered at a stop price above the current market price. Investors generally use a buy-stop order to limit a loss, or to protect a profit, on a stock that they have sold short. A sell-stop order is entered at a stop price below the current market price.
It is a transparent system that matches customer orders (e.g. bids and offers) on a 'price time priority' basis. The highest ("best") bid order and the lowest ("cheapest") offer order constitutes the best market or "the touch" in a given security or swap contract. Customers can routinely cross the bid/ask spread to effect immediate execution.