# Collateral swaps: replacing backing while keeping a loan open

A collateral swap replaces one supplied asset with another while coordinating the lending position’s constraints. Aave’s documented swap adapter can combine swapping and re-supply in one transaction, with or without a flash-loan path. Equal market value does not imply equal borrowing power because assets can have different eligibility and risk parameters.

Evidence: [Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features); [Toggle Collateral Status](https://aave.com/help/supplying/toggle-collateral-status)

Canonical: https://degreesofsatoshi.com/encyclopedia/collateral-swaps/
Published: 2026-10-02
Substantively modified: 2026-10-02
Independently verified by an automated reviewer: 2026-10-02T19:18:00.092Z
Data current through: 2026-10-02

AI-assisted research and drafting with a separate automated source-verification pass; no external expert or named human review is implied.

## Key facts

- **Replacement:** The adapter swaps supplied assets and supplies the result. ([Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features))
- **Output bound:** The documented methods include a minimum amount to receive. ([Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features))
- **Risk parameters:** Collateral LTV and liquidation thresholds can differ. ([Toggle Collateral Status](https://aave.com/help/supplying/toggle-collateral-status))

## Compare adjusted collateral value

Suppose 1,000 of asset A has an 80% liquidation threshold and supports 600 debt. Health factor is about 1.33. Replacing it with 1,000 of asset B at a hypothetical 70% threshold gives 700 / 600 ≈ 1.17 before costs.

Receiving the same market value did not preserve the same margin of safety. Slippage reducing the output value makes the distinction larger.

Evidence: [Health Factor and Liquidations](https://aave.com/help/borrowing/liquidations); [Toggle Collateral Status](https://aave.com/help/supplying/toggle-collateral-status)

## Temporary health can matter

A manual withdrawal followed by a later deposit may be impossible while the first asset backs debt. The documented adapter coordinates replacement and checks; a flash loan can support the temporary sequence. Where a non-flash path is permitted, its preconditions differ.

Evidence: [Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features)

## Confirm that the new asset counts

The destination asset must be valid for the selected market and collateral configuration. Review category borrowing permissions, minimum output, approvals and final health factor. A completed token swap that leaves the new asset outside the relevant collateral category may not achieve the intended borrowing arrangement.

Evidence: [Efficiency Mode](https://aave.com/help/borrowing/e-mode); [Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features)

## Questions

### Does swapping collateral change the asset I owe?

A collateral swap changes the supplied side. Changing the debt asset is a separate refinancing operation.

Evidence: [Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features)

## Claims and scope

### collateral-swaps-quick-answer

A collateral swap replaces one supplied asset with another while coordinating the lending position’s constraints. Aave’s documented swap adapter can combine swapping and re-supply in one transaction, with or without a flash-loan path. Equal market value does not imply equal borrowing power because assets can have different eligibility and risk parameters.

Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null}

### collateral-swaps-fact-replacement

Replacement: The adapter swaps supplied assets and supplies the result.

Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null}

### collateral-swaps-fact-output-bound

Output bound: The documented methods include a minimum amount to receive.

Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null}

### collateral-swaps-fact-risk-parameters

Risk parameters: Collateral LTV and liquidation thresholds can differ.

Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null}

## Sources

- [Aave v3 Swap Features](https://aave.com/docs/aave-v3/smart-contracts/swap-features) — Aave. Documented adapter/flash-loan/DEX composition; availability varies by market. Locator: Repay with collateral; Collateral Swap; Debt Swap. Retrieved: 2026-10-02T18:53:21.663Z.
- [Toggle Collateral Status](https://aave.com/help/supplying/toggle-collateral-status) — Aave. Changing collateral status independently of supply balance. Locator: Enable; Disable; health factor. Retrieved: 2026-10-02T18:53:21.565Z.
- [Health Factor and Liquidations](https://aave.com/help/borrowing/liquidations) — Aave. Weighted liquidation thresholds; no universal safe ratio. Locator: Health Factor; Managing Health Factor. Retrieved: 2026-10-02T18:53:21.960Z.
- [Efficiency Mode](https://aave.com/help/borrowing/e-mode) — Aave. Higher capital efficiency under category assumptions. Locator: Categories; correlated assets; risks. Retrieved: 2026-10-02T18:53:21.760Z.

## Revision history

- 2026-10-02: First publication after primary-source research and separate automated verification.

## Cite this entry

Degrees of Satoshi editorial project. “Collateral swaps: replacing backing while keeping a loan open.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/collateral-swaps/