Regulation on Wholesale Energy Market Integrity and Transparency (REMIT) is an EU regulation designed to increase the transparency and stability of the European energy markets while combating insider trading and market manipulation. REMIT was adopted in the European Union in 2011. Part of the regulation went into immediate effect in all EU member states, with some obligations around registration and transaction reporting only coming into effect once the REMIT Implementing Acts have been passed. The EU agency ACER has been tasked with the supervision and regulation of energy markets in accordance with REMIT.