Best execution
Best execution is a standard imposed by regulators on the execution of traded financial services products by broker-dealers on nehalf of their clients. It will, therefore, depend to an extent on the jurisdiciton in question, but the general thrust will be consistent wherever it applies.
FCA
According the the FCA in its Thematic Review of September 2014, "Best execution is a core component in the regulation of financial services. Its aims are threefold:
- to ensure protection for investors,
- to sustain the integrity of the price formation process (which itself underpins all trading activity) and
- to promote competition among trading venues in an increasingly fragmented market."
The FCA adopts the European Commission's comprehensive four-fold test to determine whether best execution applies in any particular circumstance to the a firm's activities
European Commission
Extract from Commission Opinion on the scope of best execution under MiFID and the implementing directive: Working Document ESC-07-2007:
{{box|4. In our view, the key concept to focus on in interpreting Article 21 is the execution of orders on behalf of clients. This is consistent with the definition in Article 4(1)(5) of MiFID, which refers specifically to a firm acting to conclude agreements to buy or sell financial instruments on behalf of clients, and the description of the relevant investment service in Annex I to MiFID as the "execution of orders on behalf of clients". Both provisions support the idea that the requirement that an order is being executed on behalf of a client is integral to the concept of best execution.
…
8. The application or otherwise of best execution will depend on whether the execution of the client’s order can be seen as truly done on behalf of the client. This is a question of fact in each case and ultimately depends on whether the client legitimately relies on the firm to protect his or her interests in relation to the pricing and other elements of the transaction – such as speed or likelihood of execution and settlement – that may be affected by the choices made by the firm when executing the order.