What it means
Imagine a broker holds an order from one client to buy 10,000 shares and another from a different client to sell exactly 10,000 shares of the same company. Instead of going to the market, the broker can match the two directly.
This is called a cross, and it saves both clients the cost and market impact of trading separately. Crosses are common with large institutional orders, such as those from pension funds, because a big order sent to the market can push the price up or down before it is complete.
By matching internally, the broker can complete the transaction quietly and at a fair price. This can be a real benefit for both sides.
Regulators care about crosses because the broker sits on both sides of the deal and could favour one client over another. Rules usually require the price to be fair, typically within the current best bid and offer, and the trade must be reported to the exchange so it is visible.
Brokers must also be able to show that each client received a good result. The term also appears in other forms.
In currency markets, a cross rate is an exchange rate between two currencies that neither is the US dollar, and in technical analysis a cross describes a line crossing another. The context tells you which meaning is intended.
For a non-specialist manager, the main point is that a cross can reduce trading costs but only when it is properly supervised. Always ask how the price was set and where the trade was reported.
In practice
Real-world examples.
Example
A pension fund wants to sell 200,000 shares in a mid-sized manufacturer. The broker finds an insurance client that wants to buy the same quantity and crosses the trade at the prevailing price, avoiding a sharp fall in the share price. The pension fund saves on the market impact it would otherwise have suffered, and the buyer gets a large block without bidding the price up.
Example
A broker at a bank matches two clients' orders in a bond. Because the bank is on both sides, its compliance team reviews the trade to check that the price was fair and that both clients were treated properly. The review confirms the price sits inside the quoted range and is recorded for later audit.
Example
A corporate treasurer needs to buy euros against sterling. The bank quotes a cross rate calculated from each currency's rate against the US dollar, because it does not trade that pair directly. The bank adds a small margin on top of the calculated rate, so the treasurer compares quotes from other banks before agreeing.
Formula
Calculation
Value of a cross = Number of shares x Agreed price
Worked example: a broker matches a client's order to sell 10,000 shares with another client's order to buy 10,000 shares at an agreed price of $50.
Value of the cross = 10,000 x $50 = $500,000.
If the current best bid is $49.90 and the best offer is $50.10, the price of $50 sits inside that range, so it is considered fair.
If the broker charges a commission of 0.1% on each side, the cost to each client is $500,000 x 0.1% = $500, which compares well with the market impact a large public order might cause.Case study
Seen in the real world.
Harlow Securities is a fictional brokerage, and this case is illustrative only. A large client asked it to sell 500,000 shares of a listed company, and the broker feared that placing the order openly would push the price down.
The trading desk found another client who wanted to buy a similar amount and arranged a cross at the midpoint of the best bid and offer. Compliance recorded the reasons for the price and reported the trade to the exchange immediately.
Both clients obtained a better outcome than they would have by trading separately, and the broker kept a record showing that neither was disadvantaged. The head of trading said the documentation mattered as much as the match itself. In the following months the firm updated its policy so that every cross trade carries a written justification, which regulators later praised during a routine review.
Watch out
Common mistakes.
- Assuming a cross happens away from regulators, when it must be reported and priced fairly. Reporting requirements exist precisely so that the market and regulators can see these trades.
- Thinking the broker can set any price it likes, when the price normally has to sit within the best bid and offer in the market. Brokers usually aim for the midpoint or a price that improves on what each client could get alone.
- Confusing a cross trade with a cross rate, which is a currency exchange rate between two non-dollar currencies.
Questions
People also ask.
Why would a broker cross a trade?
It lets two clients trade at a fair price without moving the market, and it can reduce costs for both. The saving is greatest when the order is large relative to the normal volume of trading.
Is a cross trade legal?
Yes, when conducted under the rules, with fair pricing, proper disclosure and reporting to the exchange. Firms that misuse crosses, for example by favouring one client, can face fines and loss of licence.
Who benefits most?
Large institutional investors, whose orders could affect the market price if they were sent openly. Smaller investors benefit indirectly when large trades cause less disruption to the share price.
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