# B-book

> Keeping a trader’s orders in-house, with the firm as the counterparty. In the evaluation model this is the simulated account.

**Source:** https://proptechpal.com/glossary/b-book  
**Generated:** 2026-09-24  
**Publisher:** Prop Tech Pal — independent prop firm technology comparison

_Disclosure grades measure what a vendor publishes, never product quality. A vendor publishing a weak SLA scores better than one publishing none._

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## Why it matters

Needs a price feed but no liquidity provider. The firm’s exposure is its payout liability, which is what the risk engine exists to bound.

## Where it applies

- [Simulated funded account](https://proptechpal.com/glossary/simulated-funded-account)
- [Prop firm risk management software](https://proptechpal.com/categories/risk-management)

[The full glossary](https://proptechpal.com/glossary)