What it means
When an investment manager decides to buy shares, someone has to turn that decision into a completed trade. The executing broker is that someone, routing the order to an exchange or another trading venue and getting it filled on the best terms it can find.
Its job ends when the trade is done and confirmed. The executing broker is frequently not the same firm as the clearing broker or the custodian who holds the assets.
Under the prime brokerage model a fund may trade with a dozen executing brokers during a single day and have every one of those trades settled and held in one place. That keeps reporting simple while letting the fund shop around for the best execution available.
For anyone running money, the choice of executing broker feeds directly into returns. A firm with better access to liquidity, smarter order routing and lower commissions leaves more of the trade's value with the client.
Regulators in most markets require managers to seek best execution rather than simply sending everything to a favoured firm. Executing brokers are paid in commission, quoted as cents per share, a percentage of the value traded, or a flat ticket fee.
Institutional equity commissions are usually discussed in basis points, where one basis point equals 0.01% of the value traded. Some brokers also take the other side of a client's trade themselves, acting as principal rather than as agent.
That is not automatically a problem, but it creates a conflict worth understanding, because the firm's trading profit comes out of the price the client receives. It is reasonable to ask whether an order was filled on an agency basis or against the broker's own book.
In practice
Real-world examples.
Example
A long-short equity fund uses six executing brokers across European and US markets but clears everything through one prime broker. Each morning it reviews yesterday's fills against arrival prices and shifts flow towards whichever brokers achieved better average prices. Over a quarter that reallocation improves realised execution by roughly 4 basis points.
Example
An insurance company's treasury team needs to sell $40,000,000 of corporate bonds quietly. It appoints an executing broker with strong relationships among institutional bond buyers rather than the cheapest quote, because in a thin market finding a real buyer matters far more than a few cents of commission.
Example
A retail investor placing an order through an online platform never sees the executing broker, because the platform routes the order to one behind the scenes. When the investor asks why a market order filled slightly worse than the quoted price, the answer lies in the routing choices the executing broker made.
Formula
Calculation
Commission = number of shares x rate per share. Commission as a percentage of the trade = commission / (shares x price).
A pension fund manager buys 200,000 shares at an average price of $25.00, a notional value of 200,000 x $25.00 = $5,000,000.
The executing broker charges 2 cents per share, so commission = 200,000 x $0.02 = $4,000.
As a proportion of the trade, that is $4,000 / $5,000,000 = 0.0008, or 0.08%, which market participants would quote as 8 basis points.
A competing broker offers 1.2 cents per share for the same order type. Commission would be 200,000 x $0.012 = $2,400, a saving of $1,600 on this single order and 4.8 basis points rather than 8.
If the fund places 250 comparable orders a year, the annual saving is 250 x $1,600 = $400,000. On a $2,000,000,000 portfolio that is 2 basis points of performance recovered from trading costs alone, before any difference in fill quality is counted.Case study
Seen in the real world.
This is an illustrative and fictional case. Cardon Asset Management, an invented mid-sized manager, ran $3,000,000,000 of equities and had used a single executing broker for a decade because the relationship was comfortable. Its compliance team flagged that the firm had no evidence it was meeting its best execution obligation.
The fictional firm ran a three-month trial, splitting identical order types between the incumbent and two challengers and measuring average fill prices against the price at the moment each order was released. The incumbent averaged 11 basis points of slippage, the challengers 7 and 6. On annual turnover of $1,200,000,000, closing a 4 basis point gap was worth $1,200,000,000 x 0.0004 = $480,000 a year.
Cardon kept all three brokers, moved most large orders to the best performer and renegotiated the incumbent's rate from 2 cents to 1.5 cents per share. The illustrative moral was that an executing broker is a supplier like any other, and suppliers who are never measured rarely sharpen their pencils.
Watch out
Common mistakes.
- Assuming the executing broker also holds your assets. Execution, clearing and custody are separate functions and are often carried out by different firms.
- Judging an executing broker on commission alone. A cheap broker that fills orders badly can cost far more in slippage than it saves in fees.
- Treating best execution as a rule about price only. It also covers speed, likelihood of completion, settlement reliability and total cost, which is why a slightly worse quoted price can still be the better fill.
Questions
People also ask.
Can one firm be both the executing and the clearing broker?
Yes, many full-service brokers do both, but institutional clients often deliberately separate the two roles.
How do I tell whether my executing broker is doing a good job?
Compare average fill prices against a benchmark such as the price when the order was released or the day's volume weighted average price.
Does the executing broker guarantee my trade will settle?
Usually not on its own, because settlement risk normally sits with the clearing broker or the central counterparty behind the trade.
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