Abstract: An anonymous trading system comprises an interconnected network of broking noted arranged in cliques which receive buy and sell orders from trader terminals via connected trading engines and which match persistent orders, executed deals and distribute price information to trader terminals. Where two orders are matched, a proposed deal message is sent by the matching broker. If another broker has processed an event which makes the matched quote unavailable the match fails and rematch may occur. Rematch may be attempted by an intermediate broker provided it owns one side of the match, or it received both sides of the match from brokers in different cliques. The intermediate broker attempts to match with the next available quote in the queue.

Abstract: An improved multiple order facility for a computerized trading system in which a first trader submits a plurality of orders for display and acceptance by other traders, including a first subsystem which permits the first trader to simultaneously generate a plurality of orders, and a second subsystem which displays the orders at computer terminals of the other traders to whom the orders were sent. Using the first subsystem, the first trader selects one or more financial instruments associated with a respective one of the orders from a displayed list of related financial instruments, selects a common quantity to be applied to each of the orders, and selects, for each order, a respective price at which the first trader is willing to buy or sell the financial instrument associated with that order. Each of the orders is then sent to a plurality of other trading using the computerized trading system.