Mitigation of latency disparity in a transaction processing system

Systems and methods are disclosed which match or otherwise allocate an incoming transaction with previously received but not yet fully satisfied transactions counter thereto as well as to mitigation of disparities in latencies between the client devices of the market participants and the electronic data transaction processing system which may result in disparities in the time of receipt of competing transactions. The disclosed embodiments may mitigate such disparities by buffering or otherwise grouping temporally proximate competing transactions together upon receipt, e.g. into a group, collection, set, bucket, etc., and subsequently arbitrating among those grouped competing transactions, in a manner other than solely based on the order in which the competing transactions in the group were received, to determine the order in which those competing transactions will be processed, thereby equalizing priority of transactions received from participants having varying abilities to rapidly submit transactions or otherwise capitalize on transactional opportunities.