Encyclopedia DeFi · Entry 60
DeFi lending pools: supply claims, debt and available liquidity
In this article
At a glance
Key facts
| Fact | Detail | Source |
|---|---|---|
| Supply receipt | Aave aToken balances represent supplied assets and accrued yield. | [2] |
| Debt | Variable debt balances include accrued interest. | [2] |
| Withdrawal | Available liquidity and collateral health constrain withdrawals. | [1] |
Supplying and borrowing create different records
Supplying 100 units to a standard Aave V3 reserve creates a supply claim denominated in that underlying asset. A separate borrower can take available units if the borrowing operation meets the applicable rules. The debt is an obligation, not another freely transferable receipt.
The supplied token, aToken and debt token are distinct contracts or records. A wallet balance denominated in the same asset name can therefore represent an underlying token, a claim on a pool or an amount owed.
A supply balance is different from immediately available liquidity
Suppose a simplified reserve holds claims for 1,000 supplied units while 900 are currently borrowed, leaving 100 idle units before other accounting effects. A supplier with a 300-unit claim cannot infer that all 300 can be withdrawn immediately from that snapshot.
The protocol also checks whether a withdrawal would leave that supplier’s own debt insufficiently collateralized. Available liquidity and account health are separate requirements. A displayed aToken balance establishes the recorded position, not an unconditional instant-exit promise.
Collateral rules connect the account’s positions
When supplied assets secure borrowing, removing collateral can worsen the account’s health. The protocol can reject a withdrawal that would violate its constraints. A collateral price decline or an increase in debt can also make liquidation possible.
These statements describe the cited Aave V3 mechanisms, not every lending product. Isolated markets, permissioned credit and other designs can have different eligibility, risk sharing and settlement rules. Always record the market and version with a comparison.
Direct answers
Questions people ask
Does a displayed supply balance guarantee instant withdrawal?
No. Redemption needs available underlying liquidity and must satisfy the position’s collateral rules. An accounting claim and cash immediately available to withdraw are different quantities.
Inspect the evidence
The answer and key facts have stable claim links. These records retain the scope and qualification when reused.
A DeFi lending pool lets suppliers place assets in a reserve that eligible borrowers can use. In Aave V3, suppliers receive aToken claims and borrowing creates debt subject to collateral or authorized credit-delegation rules. Interest, available liquidity and market settings affect what each position can do.
Scope: DeFi. Verification: verified · 2026-10-02T18:17:57.897Z.
Link to this claimSupply receipt: Aave aToken balances represent supplied assets and accrued yield.
Scope: DeFi. Verification: verified · 2026-10-02T18:17:57.897Z.
Link to this claimDebt: Variable debt balances include accrued interest.
Scope: DeFi. Verification: verified · 2026-10-02T18:17:57.897Z.
Link to this claimWithdrawal: Available liquidity and collateral health constrain withdrawals.
Scope: DeFi. Verification: verified · 2026-10-02T18:17:57.897Z.
Link to this claimRevision history
- — First publication after primary-source research and independent automated verification.
- — Expanded explanation: A supply balance is different from immediately available liquidity. Worked examples are illustrative; source checks and independent verification are recorded separately.
Source register
Sources and references
Retrieval dates and locators are recorded individually.- Aave V3 PoolAave
Pool operations, collateral restrictions and liquidation settlement.
Locator: supply; withdraw; borrow; repay; liquidationCall · Version / scope: Aave V3 · Retrieved: 2026-10-02Open source - Aave V3 tokenizationAave
Supply receipts accrue interest and debt tokens record principal plus interest.
Locator: AToken; VariableDebtToken · Version / scope: Aave V3 · Retrieved: 2026-10-02Open source - Health Factor & LiquidationsAave
Weighted liquidation thresholds and eligibility below health factor one.
Locator: Health Factor; Managing Health Factor; Liquidation Process · Retrieved: 2026-10-02Open source
Research and drafting use AI assistance. A separate automated review checks claims against primary sources; no external expert or named human review is implied. Publication, substantive editing, source retrieval and verification are recorded separately. This version was independently checked by an automated reviewer on 2 October 2026.
Editorial method and correctionsDegrees of Satoshi editorial project. “DeFi lending pools: supply claims, debt and available liquidity.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/defi-lending-pools/