Under MiFIR priority rules, when the buyer is an SI and the seller is not, the buyer SI assumes responsibility for publication. This ensures that each transaction is published only once.

ESMA identified that nearly 60% of equity transaction volume historically escaped pre-trade transparency (dark trading), which motivated the 2024 reforms to create a European Consolidated Tape Provider.

Transaction publication plays three primary roles: price formation (price discovery), reduction of information asymmetries, and market integrity monitoring. These functions ensure a fair and transparent market.

MiFIR distinguishes two channels for transaction publication: trading venues (regulated markets, MTFs, OTFs) and over-the-counter (OTC) transactions. This distinction is crucial as it determines the responsible actors and the publication process.

Yes, for a transaction executed on a trading venue, the publication process is integrated into the venue's operations. As soon as the transaction is concluded, it is timestamped, verified, and published in real time via the venue's data feeds.

Trading venues integrate the publication process directly, while OTC transactions require an APA for validation and publication. This distinction is essential for understanding the responsibilities of different actors.

Yes, APAs must ensure that data is not disclosed before publication to maintain equal access to information and prevent unfair informational advantages.