What Does A book Mean when Trading Forex?- A Simple Definition of A Book in the FX Market

To boil it down to the simplest level, A and B book are terms that refer to how a broker handles the risk associated with the business, which is represented by all the trades currently open at the broker. Let’s consider a very basic example. 

Let’s say Trader A has bought 100,000 EUR/USD while the Trader B has sold 100,000 EUR/USD. In this case, the broker faces no risk as any uptick in price on Trader A’s account, reflects a downtick in price on Trader B’s account.

Scenario

Trader A Buys 100,000 EUR/USD at 1.2140

Trader B Sells 100,000 EUR/USD at 1.2140

EUR/USD rises to 1.2240

Trader A has a net profit of 100 pips (+100 pips)

Trader B has a net loss of 100 pips (-100 pips)

Total Risk to the Broker: 100 pips – 100 pips = 0

How A Book Works

In the above example, the broker is taking on no associated risk since their risk is hedged. This is no different than having a hedged position on a trading account. In fact, a broker’s book of business is much like a trading account, the only difference being that the broker isn’t placing the orders.

In the above case, the broker has 2 choices, either to send both of the orders to their pricing providers, or not to. If it is a full A book broker, then all trades are sent to their pricing provider and the broker earns money via the spread markup.

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We hope this outlook was helpful. If you’d like to learn more, start your own FX brokerage or require guidance on finding a broker to partner with, don’t hesitate to contact us!

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