> ## Documentation Index
> Fetch the complete documentation index at: https://docs.solana.vanna.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Health Factor

> How Vanna decides whether a margin account is safe to borrow, withdraw, or liquidate.

```text theme={null}
Health factor = collateral USD / debt USD
```

An account with debt is healthy only when this ratio is **strictly greater than 1.10**. Equality is unhealthy.

Zero debt is always healthy. The program uses a maximum-integer sentinel for an unbounded ratio.

<Warning>
  An account with debt is healthy only when `collateral USD / debt USD > 1.10`. Equality is unhealthy. A displayed Health Factor at or below 1.1 is a liquidation candidate.
</Warning>

## What counts as collateral

* Live SPL balances in margin vaults, priced with Pyth
* Recognized Lite / Kamino receipt value
* Conservative rounding: collateral value floors, debt value ceils

Unpriced, stale, or low-confidence feeds can fail the instruction instead of silently counting as zero.

## What moves health

* Stock or SOL price
* Accrued borrow interest
* Swap slippage (vault composition changes)
* Kamino exchange-rate moves on Farm receipts

There is no guaranteed time to liquidation. Read [Liquidation](/guides/margin/liquidation) and [Math Reference](/developers/math-reference).