Trade Reporting

Trade reporting is the obligation of firms that trade financial instruments to submit details of their executed transactions to an outside body: a regulator, a registered data repository or the market at large. The reports state what was traded, when, at what price and in what quantity, and, in reports made to authorities, who the parties were. It is a branch of regulatory reporting that applies to banks, brokers, asset managers, trading venues and, for derivatives, many non-financial companies.

The term covers several distinct obligations that are often confused. Reports published to the market serve transparency and price discovery. Reports sent confidentially to regulators support the detection of market abuse. Reports of derivatives and securities financing trades to repositories allow authorities to monitor the build-up of risk. A single trade can trigger more than one of these, each with its own content, deadline and recipient.

• Post-trade transparency. The price, volume and time of a trade are made public shortly after execution. When a trade takes place on an exchange the venue publishes it; when it takes place over the counter, one of the parties must report it through an approved channel. Large trades may qualify for delayed publication.
• Transaction reporting. A detailed, non-public report is sent to the regulator, usually by the end of the next working day, identifying the firm, its client and the individuals or algorithms that made the investment decision and executed the trade. This is covered under regulatory transaction reporting.
• Derivatives reporting. The conclusion, modification and termination of derivative contracts, together with valuations and collateral, are reported to a trade repository. See trade repository reporting.
• Securities financing reporting. In the European Union and the United Kingdom, repos and securities lending trades are reported to repositories under a separate regulation.

Off-exchange trades in US shares are reported to trade reporting facilities operated with the exchanges, and all share trades feed a consolidated public tape. For corporate bonds, the Trade Reporting and Compliance Engine (TRACE), introduced in 2002 and operated by the Financial Industry Regulatory Authority, requires dealers to report over-the-counter trades, which are then disseminated publicly; its coverage has since been extended to other debt securities. Municipal bond trades are reported under a parallel system. Swaps are reported to swap data repositories under rules made by the Commodity Futures Trading Commission and the Securities and Exchange Commission following the Dodd-Frank Act. Order and trade events in shares and options are also recorded in a consolidated audit trail for regulators' use.

Under MiFID II and its companion regulation, in force since January 2018, investment firms that trade outside a venue publish their trades through an approved publication arrangement, while transaction reports reach the national regulator through an approved reporting mechanism or the venue. The rules apply to instruments traded on a regulated market, a multilateral trading facility or an organised trading facility, and determine which party reports; in the EU, since February 2025, a firm registered as a designated publishing entity reports, and where neither or both parties are registered the seller does, a test that replaced the earlier one based on which party was a systematic internaliser.

Derivatives are reported under the European Market Infrastructure Regulation (EMIR), which requires both counterparties to report by the end of the following working day. Revised EMIR reporting standards, with a larger set of data fields and messages in the ISO 20022 format, took effect in the EU in April 2024 and in the UK in September 2024. After its withdrawal from the EU, the UK retained these regimes in domestic law, so firms active in both jurisdictions often report the same trade twice.

Authorities have worked to make reports comparable across countries. Parties are identified by a legal entity identifier, securities by an ISIN, and derivatives trades by a unique transaction identifier shared by both counterparties and a unique product identifier. A common set of critical data elements for derivatives has been agreed internationally and is being adopted in successive rewrites of national rules.

Reporting is data-intensive and error-prone. Firms must decide for each trade whether it is reportable, under which regime and by whom; gather data from trading, client and reference data systems; and submit it within the deadline. Under two-sided regimes, the counterparties' reports are paired and compared, and mismatches must be resolved. Regulators have fined firms for failing to report, for reporting inaccurately and for over-reporting trades that should not have been sent. Typical controls include reconciling submitted reports back to source records, monitoring rejections from the repository or regulator, and periodic regulatory compliance testing. Many firms delegate submission to a counterparty or vendor but remain legally responsible.

The rules have been criticised for fragmentation, with different fields, formats and identifiers demanded by different authorities for the same trade, and for the cost this places on smaller firms. Data quality has also been a persistent concern: regulators' own reviews have found that repository data was at first difficult to aggregate. Market participants additionally argue that rapid publication of large trades can expose a dealer's position before it is hedged, which is why deferral rules remain contested.

• European Securities and Markets Authority
• Financial Industry Regulatory Authority (FINRA)