ACER reports 453 open REMIT cases as it tracks algorithmic trading
Serguey Asael Shinder1 min readACER's 45th REMIT Quarterly continues the series on algorithmic trading in wholesale energy markets begun in the 44th edition, and explains how the agency is adapting its market surveillance as automated execution grows. REMIT is the EU framework for detecting and deterring manipulation and abuse in wholesale energy markets; ACER's position is that abuse must be detectable whether trading is manual or automated.
The same issue reports 453 REMIT breach cases under review at the end of the second quarter of 2026, and carries a case report on the Hungarian regulator's decision to fine Hungaro Energy for manipulating the gas market. It also covers two joint ACER-European Commission events, the annual REMIT workshop on 11 June 2026 and a webinar on new REMIT implementing rules on 23 April 2026, changes to the geographical scope of inside information platforms, and a continued rise in trading on organised market places driven by growth in natural gas forward markets.
What it means
The number that describes the workload is 453. Market surveillance is a caseload problem before it is a technology problem, and a regulator publishing its backlog is being more useful than one publishing a strategy.
Algorithmic trading changes the detection task rather than the definition of abuse. The prohibited behaviours are the same; what changes is that intent has to be inferred from a program's configuration rather than from a person's decisions, at volumes and speeds where a pattern can exist for minutes and never be seen by a human. The honest version of that problem is the one ACER states: surveillance has to work regardless of who or what placed the order.