EMIR and MiFIR Transaction Reporting
European derivatives and securities trades must be reported to regulators in enormous detail under two overlapping regimes, EMIR and MiFIR — a compliance burden that quietly shapes how European trading desks build their operations.
After the 2008 financial crisis, regulators realized they had almost no visibility into who held what derivatives exposure — a crucial gap when a single counterparty's collapse (like Lehman's) could cascade through a web of contracts nobody outside the parties involved could see. Europe's response was two overlapping reporting regimes that between them cover nearly every trade a European desk executes.
EMIR (the European Market Infrastructure Regulation) requires both counterparties to a derivative trade — OTC or exchange-traded — to report the details to a registered trade repository, typically by the next business day. The point is systemic: regulators want a complete map of derivatives exposure across the financial system, so they can see concentration risk building up before it becomes a crisis, not after.
MiFIR (the Markets in Financial Instruments Regulation, the reporting arm of the broader MiFID II framework) is broader in scope but different in purpose: it requires investment firms to report transactions in a huge range of financial instruments — not just derivatives — to their national regulator, with the goal of detecting market abuse (insider trading, manipulation) rather than mapping systemic risk. The reports include granular detail: the specific trader or algorithm responsible, the client on whose behalf the trade was made, and precise timestamps.
Because the two regimes were built for different purposes by different rulemaking processes, a single derivative trade executed by a European firm can trigger reporting obligations under both, to different repositories, with different (though overlapping) data fields — a duplication that has been a long-running complaint from the industry and a target of subsequent "refit" simplification efforts. For a trading desk, this isn't abstract: transaction reporting requirements shape what data fields a firm's order management system must capture at the moment of execution, since missing or wrong data can't be reconstructed cleanly after the fact.
EMIR and MiFIR are separate, overlapping European reporting regimes — EMIR maps systemic derivatives exposure across counterparties, MiFIR is a broader transaction-reporting regime aimed at detecting market abuse. A single derivative trade can trigger obligations under both, which is why order management systems have to capture detailed trade and trader data at execution time, not reconstruct it afterward.
Further reading
- ESMA, EMIR Refit and MiFIR Transaction Reporting Technical Standards