---
title: A-Book vs B-Book vs Hybrid: Broker Execution Models Explained
description: Understand A-book, B-book and hybrid execution models, how brokers earn in each, the risks involved and how technology helps manage them.
url: https://www.brokerwhitelabelsolution.com/blog-a-book-vs-b-book-vs-hybrid
language: en
publisher: Broker White Label Solutions
---

# A-Book vs B-Book vs Hybrid: Choosing Your Brokerage Execution Model

By Broker White Label Solutions Team · Published 6 May 2025 · Updated 18 October 2026 · 7 min read

**Quick answer**

In an A-book model the broker passes client trades to liquidity providers and earns from spreads and commissions. In a B-book model the broker takes the other side of client trades and carries market risk. A hybrid model routes some clients or trades to the A-book and keeps others in the B-book, based on risk rules.

## A-book (STP/ECN)

Orders are passed to liquidity providers. Revenue comes from markups and commissions, and the broker carries little market risk. Execution quality depends on the liquidity setup.

## B-book (market making)

The broker internalises client trades. Revenue can be higher, but the broker is exposed to profitable traders and sudden market moves. Strong risk management is essential.

## Hybrid

Most brokers use a hybrid approach: consistently profitable or large traders are routed to the A-book, while other flow is internalised. Exposure above limits can be hedged automatically.

## Comparison

|  | A-book | B-book | Hybrid |
| --- | --- | --- | --- |
| Market risk | Low | High | Managed |
| Revenue source | Spreads, commissions | Client losses, spreads | Both |
| Technology needed | Bridge, liquidity | Risk tools | Bridge + risk tools + profiling |

## Technology that makes hybrid work

- [Liquidity bridge](https://www.brokerwhitelabelsolution.com/liquidity-bridge) with routing rules.
- [Real-time risk management](https://www.brokerwhitelabelsolution.com/risk-management) and alerts.
- [AI client profiling](https://www.brokerwhitelabelsolution.com/reporting-bi) to classify traders.
- [Dynamic leverage](https://www.brokerwhitelabelsolution.com/dynamic-leverage) to limit exposure.

Execution models are subject to regulation and disclosure requirements in many jurisdictions. Take legal advice for your licence.

## Frequently asked questions

Many new brokers start with a hybrid model supported by good risk tools, but the right choice depends on capital, licence and strategy.

Market making is permitted in many jurisdictions with proper licensing, conflict-of-interest management and disclosure.

Using rules based on profitability, trade size, holding time and behaviour, often supported by client-profiling tools.

## Related services

### Risk Management

[Explore service](https://www.brokerwhitelabelsolution.com/risk-management)

### MT4/MT5 Liquidity Bridge

[Explore service](https://www.brokerwhitelabelsolution.com/liquidity-bridge)

### Reporting & Business Intelligence

[Explore service](https://www.brokerwhitelabelsolution.com/reporting-bi)

[Book a free consultation](https://www.brokerwhitelabelsolution.com/contact)[More articles](https://www.brokerwhitelabelsolution.com/blog)

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Source: https://www.brokerwhitelabelsolution.com/blog-a-book-vs-b-book-vs-hybrid
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Broker White Label Solutions is a technology provider only. It does not provide brokerage, investment or payment services and does not hold client funds. General information, not legal, financial or tax advice.