Abstract: Techniques for buy-side order matching in the trading of financial instruments using a centralized matching engine having one or more storage devices including rules and order parameters for a plurality of buy-side parties. The centralized matching engine includes one or more transmitters and receivers communicatively coupled to a network and one or more processors operatively coupled to the one or more storage devices and the one or more transmitters and receivers. At least one message sent over the network by a plurality of buy-side parties and is received by the central matching engine to set the rules or order parameters. At least one order of at least two of the plurality of buy-side parties is matched based on the rules and the order parameters. A message is transmitted over the network to a sell-side party indicating that trade negotiation can commence.