In the MiFIR RTS 22 (Regulatory Technical Standards), a transaction is broadly defined as:
- A purchase or sale of a financial instrument
- Entering into or closing out of a derivative contract in a financial instrument
- An increase or decrease in the notional amount for a derivative contract that is a financial instrument
- The simultaneous acquisition and disposal of a financial instrument where there is no change in the ownership of that instrument but post trade publication is required.