2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/31028New services based on the best-effort paradigm could complement the current deterministic services of an electronic financial exchange. Four crucial aspects of such systems would benefit from a hybrid stance: proper use of processing resources, bandwidth management, fault tolerance, and exception handling. We argue that a more refined view on Quality-of-Service control for exchange systems, in which the principal ambition of upholding a fair and orderly marketplace is left uncompromised, would benefit all interested parties.11 pages, 1 figureComputational Engineering, Finance, and ScienceI.2.11; J.4; K.4.4text