What it means
The term is most common in retail foreign exchange and contracts for difference, where brokers are described either as dealing desk, also called market maker or B-book, or as no dealing desk, sometimes called A-book or straight-through processing. A dealing desk broker fills the client internally, while a no dealing desk broker routes the order to liquidity providers and earns a commission or a marked-up spread.
Internalising trades is not automatically improper, and it often gives clients tighter spreads on small orders because no external liquidity has to be paid for. The concern is the conflict of interest, since when the broker is the counterparty a client loss becomes a broker gain on any position that has not been hedged.
Most sizeable brokers run a hybrid book rather than a pure model. They net client positions against each other, keep the residual exposure inside a defined risk limit and hedge anything beyond that limit externally, so the desk earns the spread on netted flow and passes the rest to the market.
Practices that draw regulatory attention include requoting a price after the client has clicked, applying slippage asymmetrically so that it favours the broker, and widening spreads sharply around scheduled news announcements. Reputable regulators now require best-execution policies and clear disclosure of the operating model, which is why the phrase turns up in client agreements.
The same term is used far more neutrally on institutional trading floors. There, a dealing desk is simply the group that executes orders on behalf of the firm or its clients, sitting alongside sales, research and risk management.
In practice
Real-world examples.
Example
A retail contracts-for-difference broker discloses in its terms that it acts as principal on all client trades. A client reading the document realises the broker is his counterparty rather than his agent, and moves his larger positions to a firm that routes orders to an exchange, keeping only small trades where the tighter internal spread is worth more than the conflict.
Example
An active currency trader notices that her orders fill instantly when the market moves against her but are requoted when the market moves in her favour. She raises it with the broker's compliance team, which is required to demonstrate that slippage is applied symmetrically under its best-execution policy.
Example
A pension fund's in-house dealing desk receives instructions from portfolio managers and works the orders over several days to limit market impact. Here the desk has no proprietary position at all, and its performance is measured against volume-weighted average price rather than trading profit.
Formula
Calculation
Dealing desk revenue = (Spread markup per lot x Lots traded) + Net result on internalised positions
A retail broker adds a 0.6 pip markup to the EUR/USD spread it receives from its liquidity providers. On a standard lot of $100,000, one pip is worth about $10, so the markup is worth about 0.6 x $10 = $6 per lot.
In one month the broker's clients trade 40,000 standard lots. Markup revenue is 40,000 x $6 = $240,000.
The desk internalises 65% of that flow rather than hedging it, and over the month those internalised client positions produced a net loss for clients of $180,000, which the broker keeps.
Total desk revenue for the month is $240,000 + $180,000 = $420,000. The $240,000 markup portion is earned whichever way client trades go, while the $180,000 is exactly the part that creates the conflict of interest regulators focus on, and it would have been a $180,000 cost had clients been net winners instead.Case study
Seen in the real world.
Kestrel Markets is an entirely fictional retail broker invented for this illustrative case study. It operated a full dealing desk model, internalising almost all client flow, and reported strong revenue for two years running.
Then a sustained one-way move in a major currency pair caught the desk with unhedged exposure on the wrong side of a large concentration of client positions. Because roughly 90% of flow had been internalised, the firm absorbed the full amount of client gains, some $14,000,000, against monthly markup revenue that had been averaging about $400,000.
In this illustrative scenario the firm survived only after a capital injection, and it rebuilt its model around automatic hedging of any net exposure above a set threshold. The lesson drawn was that a dealing desk is not a licence to print money but a trading business with real risk, and it needs the risk limits and capital that any trading business requires.
Watch out
Common mistakes.
- Assuming a dealing desk broker is automatically dishonest, when internalisation is a legitimate and disclosed model used by many regulated firms.
- Assuming a no dealing desk broker is automatically cheaper, when its commissions plus a raw spread can easily exceed a marked-up all-in spread on small trades.
- Judging a broker by its advertised spread alone, without checking slippage, requote behaviour and how spreads behave during news events.
Questions
People also ask.
How can I tell which model a broker uses?
The client agreement and the best-execution policy state whether the firm acts as principal or as agent, and a firm that will not answer the question plainly is telling you something.
Does a dealing desk always trade against its clients?
No, most run a hybrid book that nets client positions against each other first and hedges the residual exposure externally.
Why would a client ever prefer a dealing desk broker?
Because internalised pricing can be tighter on small sizes, execution is often faster, and features such as guaranteed stop-loss orders are only possible when the broker is willing to be the counterparty.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%Related