# Does supplied collateral earn interest? Read the market accounting Collateral does not earn interest merely because it backs a loan. Aave supplies can accrue pool interest while eligible supplies also serve as collateral. Morpho Blue separates loan-asset lending from collateral deposits, and its collateral balance does not earn Morpho lending interest. A collateral token can still have its own independent yield mechanism. Evidence: [LiquidityPool](https://aave.com/docs/aave-v3/concepts/liquidity-pool); [Market Mechanics](https://docs.morpho.org/developers/borrow/concepts/market-mechanics/); [Pendle Introduction](https://docs.pendle.finance/pendle-v2/Introduction) Canonical: https://degreesofsatoshi.com/encyclopedia/lending-collateral-interest/ 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 - **Aave supply:** Supplied tokens accrue the reserve’s supply rate under Aave’s rules. ([LiquidityPool](https://aave.com/docs/aave-v3/concepts/liquidity-pool)) - **Morpho collateral:** The cited Blue collateral accounting is asset-based and earns no lending yield. ([Market Mechanics](https://docs.morpho.org/developers/borrow/concepts/market-mechanics/)) - **Separate mechanism:** Yield-bearing tokens can represent returns generated by another protocol. ([Pendle Introduction](https://docs.pendle.finance/pendle-v2/Introduction)) ## Identify where the income would come from Imagine depositing token A into an Aave reserve that has a positive supply rate and enabling it as collateral. Its supply claim can accrue that rate. Depositing A solely as collateral in a Morpho Blue market is a different action; borrowers of the loan asset are not paying lending interest to that collateral balance. The same token symbol does not make the two positions economically identical. Evidence: [LiquidityPool](https://aave.com/docs/aave-v3/concepts/liquidity-pool); [Market Mechanics](https://docs.morpho.org/developers/borrow/concepts/market-mechanics/) ## A yield-bearing token adds another layer If the collateral token itself represents a growing claim on an external strategy, that underlying mechanism may continue according to its own rules. Separate its return from any lending interest the collateral market pays. A rebasing token, wrapper or reward program also needs compatibility with the market’s accounting. Evidence: [Pendle Introduction](https://docs.pendle.finance/pendle-v2/Introduction); [Market Mechanics](https://docs.morpho.org/developers/borrow/concepts/market-mechanics/) ## Compare income and borrowing cost separately Even where collateral earns something, the debt has its own cost and currency exposure. Record supplied balance, yield source, debt balance and rate independently. Expected income is not a reason to ignore liquidation, oracle or underlying-token risk. Evidence: [LiquidityPool](https://aave.com/docs/aave-v3/concepts/liquidity-pool); [Risk and Security Documentation](https://docs.morpho.org/learn/resources/risks/) ## Questions ### Does switching an asset on as collateral create a new yield source? Not by itself. It changes borrowing eligibility; the source of any yield depends on the supply or token mechanism. Evidence: [Toggle Collateral Status](https://aave.com/help/supplying/toggle-collateral-status); [LiquidityPool](https://aave.com/docs/aave-v3/concepts/liquidity-pool); [Market Mechanics](https://docs.morpho.org/developers/borrow/concepts/market-mechanics/) ## Claims and scope ### lending-collateral-interest-quick-answer Collateral does not earn interest merely because it backs a loan. Aave supplies can accrue pool interest while eligible supplies also serve as collateral. Morpho Blue separates loan-asset lending from collateral deposits, and its collateral balance does not earn Morpho lending interest. A collateral token can still have its own independent yield mechanism. Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null} ### lending-collateral-interest-fact-aave-supply Aave supply: Supplied tokens accrue the reserve’s supply rate under Aave’s rules. Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null} ### lending-collateral-interest-fact-morpho-collateral Morpho collateral: The cited Blue collateral accounting is asset-based and earns no lending yield. Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null} ### lending-collateral-interest-fact-separate-mechanism Separate mechanism: Yield-bearing tokens can represent returns generated by another protocol. Scope: {"collection":"defi","dataAsOf":"2026-10-02","blockHeight":null} ## Sources - [LiquidityPool](https://aave.com/docs/aave-v3/concepts/liquidity-pool) — Aave. Pooled supply/collateral interest and repayment asset. Locator: Supply; Borrow; Repay. Retrieved: 2026-10-02T18:53:21.761Z. - [Market Mechanics](https://docs.morpho.org/developers/borrow/concepts/market-mechanics/) — Morpho. Collateral receives no lending interest from Morpho Blue itself. Locator: Assets and shares; collateral accounting. Retrieved: 2026-10-02T19:07:09.356Z. - [Pendle Introduction](https://docs.pendle.finance/pendle-v2/Introduction) — Pendle. Principal/yield splitting and maturity accounting. Locator: Yield tokenization; PT; YT; maturity. Retrieved: 2026-10-02T18:53:22.586Z. - [Risk and Security Documentation](https://docs.morpho.org/learn/resources/risks/) — Morpho. Distinguishes types of protocol risk. Locator: Smart contract; Oracle; Counterparty; Bad debt; Liquidity risks. Retrieved: 2026-10-02T18:53:22.330Z. - [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. ## Revision history - 2026-10-02: First publication after primary-source research and separate automated verification. ## Cite this entry Degrees of Satoshi editorial project. “Does supplied collateral earn interest? Read the market accounting.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/lending-collateral-interest/