What it means
The defining feature of a dealer is that it trades as principal, meaning it is one of the two parties to the transaction rather than a middleman. When you sell bonds to a dealer, the dealer genuinely buys them and now owns them, hoping to sell them on to another customer at a slightly higher price.
That role creates liquidity, which is the ability to trade promptly at a reasonable price. In markets without a central exchange, such as corporate bonds or many currency pairs, dealers are effectively the market, because there is no order book of other buyers waiting.
The dealer's revenue comes from the spread between its bid price, at which it buys, and its ask price, at which it sells. That spread has to cover operating costs, financing on the inventory it holds, and the real risk that prices move against the position before it can be sold.
Many large financial institutions are both broker and dealer, which is why the phrase broker dealer appears on so many registrations. The distinction still matters to a client, because it determines whether the firm is on the other side of your trade or acting on your behalf.
The nuance worth remembering is that the dealer's interests are not identical to yours. A dealer quoting a wide spread in a nervous market is protecting itself from inventory risk, not penalising the client, but the client still pays that cost every time it trades.
In practice
Real-world examples.
Example
A pension fund wants to sell $12m of corporate bonds that trade rarely. No natural buyer exists that morning, so a dealer buys the whole block onto its own books at a discount and spends the next fortnight placing it with other clients.
Example
A small manufacturer converts $300,000 into euros through its bank. The bank is acting as a dealer, quoting a rate that already includes its margin, which is why the customer sees no separate commission line on the confirmation.
Example
A market maker in a small listed company is contractually required to quote continuous two way prices. During a profit warning it widens its spread from 1% to 4%, keeping the shares tradeable while protecting itself from being filled repeatedly on the wrong side of a fast moving price.
Think of it
“Dealer trades from their own inventory-buying and selling for their own account.
Formula
Calculation
Dealer spread = ask price - bid price
Spread as a percentage = spread / midpoint price
Gross spread revenue = spread x volume traded
A dealer in a listed industrial stock quotes a bid of $99.80 and an ask of $100.00 through the trading day.
Dealer spread = $100.00 - $99.80 = $0.20 per share
Midpoint price = ($99.80 + $100.00) / 2 = $99.90
Spread as a percentage = $0.20 / $99.90 = 0.20%
If the dealer buys and then resells 40,000 shares across the session, gross spread revenue = $0.20 x 40,000 = $8,000. That figure is gross rather than profit: if the price fell by $0.15 while the dealer was holding an unsold inventory of 10,000 shares, the inventory loss of $0.15 x 10,000 = $1,500 reduces the day's result to $8,000 - $1,500 = $6,500.Case study
Seen in the real world.
This is an illustrative and clearly fictional example. Ferngate Securities, an invented bond dealing house, built its business on trading unglamorous municipal bonds that larger firms ignored. It typically held around $40m of inventory and earned its living on spreads of a quarter of a point.
In the fictional account, an unexpected interest rate announcement moved bond prices sharply in a single afternoon. Ferngate was holding a large unsold position bought earlier that week, and the inventory loss wiped out roughly four months of spread income in under three hours.
The firm survived, but its management changed the way it worked. It set a hard inventory limit, started hedging positions held for more than 48 hours, and widened its quoted spreads on longer dated bonds, accepting less volume in exchange for a business that could survive an afternoon like that one again.
Watch out
Common mistakes.
- Using the words broker and dealer interchangeably, when only one of them is taking the other side of your trade and holding the risk.
- Assuming a trade with no visible commission is free, when the dealer's margin is built into the quoted price.
- Reading a wide spread as evidence that a dealer is being greedy, when it usually reflects genuine risk in an illiquid or volatile market.
Questions
People also ask.
How does a dealer differ from a market maker?
A market maker is a dealer with an obligation to quote continuous two way prices in specific securities, so every market maker is a dealer but not every dealer is a market maker.
Where do dealers matter most?
In markets without a central exchange, such as bonds, currencies and many derivatives, where the dealer network provides most of the available liquidity.
Does a dealer have to tell me it is acting as principal?
In regulated markets, yes, the confirmation should disclose the capacity in which the firm acted, and it is worth checking because it changes what the price includes.
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