Abstract: An order cross mechanism is provided where a cross request is received from a first market participant in a single transaction, the cross request specifying a client order and a predefined cross match type. Orders and/or quotes are received from second market participants within a predetermined or randomly determined period of time, and a cross match is performed in the order book immediately after expiration of the period of time. The client order is matched against an order of the first market participant and none, one or more of the orders or quotes received from the one or more second market participants, and the order of the first market participant is generated as an opposite order to the client order and having a higher priority than any orders or quotes received from the second market participants that are of the same price level than the order of the first market participant and that are entered during the period of time.