Abstract: A system includes processing circuitry communicatively coupled to a plurality of terminals and a database that includes a first data structure that identifies a plurality of participant entities and that associates each of at least a subset of the participant entities with participant category information, by which the processing circuitry is configured to identify each of the participant entities as being one of three participant category entities, a second data structure that identifies assignable share data structures and respective ones of the plurality of participant entities to which the share data structures are assigned, and a third data structure that identifies offers of the participant entities to unload one or more of the share data structures assigned to the offering participant entities, and offers of the participant entities to obtain assignment of one or more of the share data structures, offers being matched according to a three-tier paradigm.