Glossary · Execution
Principal Execution
Also: principal trading, riskless principal
Published
Principal Execution — Principal execution is a trading model in which the liquidity provider is the client's counterparty, buying from or selling to the client from its own inventory at a quoted price and then managing the resulting position as its own risk. OTC desks and market makers execute as principal; the client's cost is the spread on the quote.
How It Works
The client asks for a price; the provider quotes; the client trades against the provider. From that moment the provider owns the position and the market risk. Whether it hedges immediately across venues, works the position over time, or nets it against other client flow is its decision and its risk. The client has a completed trade at a known price.
What the Client Pays and Avoids
The visible cost is the spread embedded in the quote. The avoided costs are slippage, market impact, and information leakage, which the provider absorbs. For blocks, that trade-off is usually favorable; for small orders in liquid pairs, the spread may exceed what an agency order would have paid on a venue.
Principal or Agency
Under agency execution the provider works the order on the client's behalf, passes through the prices achieved, and charges a commission; the client keeps the market risk during execution. Under principal execution the provider takes the risk and is paid through the spread. Institutional providers often offer both, and a desk chooses per order based on urgency, size, and the need for a certain price.