MiFIR (Markets in Financial Instruments Regulation)

The Markets in Financial Instruments Regulation (MiFIR) sits at the core of the EU's market-transparency regime. As a regulation, it applies directly in every member state without national transposition, in contrast to the MiFID II directive that it accompanies. While MiFID II governs the authorisation, organisation, and conduct of investment firms and the protection of investors, MiFIR governs pre- and post-trade transparency, the trading obligation for shares and derivatives, and — most consequentially for compliance teams — transaction reporting under Articles 26 and 27.

Under Article 26, investment firms that execute transactions in financial instruments must report complete and accurate details to their national competent authority (such as CONSOB in Italy or BaFin in Germany) as quickly as possible and no later than the close of the following working day (T+1). Each report must include a unique transaction identifier, precise timestamps, price, volume, instrument identification, and the parties involved. The scope is broad, covering instruments admitted to trading or traded on an EU trading venue, including over-the-counter transactions.

Non-compliance with MiFIR transaction reporting is one of the most frequently sanctioned breaches in the sector, with penalties ranging from fines and public warnings to temporary or permanent trading restrictions. The most common failure points are data quality (accuracy and completeness of reported fields) and timeliness. Because of the volume and granularity of data involved, many firms address MiFIR reporting through automated, validated reporting pipelines rather than manual processes, integrating it into their wider regulatory compliance framework.