matched principal trading
118a transaction where the facilitator interposes itself between the buyer and the seller to the transaction in such a way that it is never itself exposed to market risk throughout the execution of the transaction, with both sides executed simultaneously, and where the transaction is concluded at a price where the facilitator makes no profit or loss, other than a previously disclosed commission, fee or charge for the transaction.
[Note: article 4 (1)(38) of MiFID]