# FAQ

## Forum

Head to <https://forum.world.inc/> for more comprehensive FAQs.

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#### Q: How does liquidation work under extreme market moves? Any stress tests? What happens in a situation where the vault has to backstop an extremely large position, similar to what happened to HLP?

A: The liquidation engine protects users. Read [ATLAS Math: Risk Based Valuation](/details/atlas-math-risk-based-valuation.md#portfolio-valuation) to understand the 'risk budget' users have available, and consequently when liquidation occurs. Read [Liquidation & No ADLs](/essentials/liquidation-and-no-adls.md#bankruptcy-liquidations) to understand the worst case scenario. See [Risk Parameters & Stats](/essentials/risk-parameters-and-stats.md#exchange-stats-webpage) to see the asset-specific risk metrics. It's worth understanding [Order books + RFQ](/essentials/order-books-+-rfq.md).

#### Q: Are there sub-account features for isolating positions?

A: Yes,  [Sub-accounts](/venue/sub-accounts.md).

#### Q: What audit coverage exists?

[Counterparty Risk](/venue/counterparty-risk.md#smart-contracts)

#### Q: What is the purpose of True Ups?

True Ups just realize unrealized PnL.

#### Q: What if the lending market becomes fully lent out, such that you cannot withdraw your USD/tokens?

Loans expire after 10 days. If there is no ability to borrow at all, then a lender must wait until the loan expires, which is a maximum of 10 days. It is unlikely WCM would ever be in a prolonged scenario in which there is no liquidity to borrow, due to arbitrage.


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