Question 1

What is the difference between supplying and borrowing in DeFi lending protocols?

Accepted Answer

When you supply assets to a lending pool, you earn interest from borrowers. Your supplied assets become liquidity that others can borrow, and you receive pool tokens representing your share. Borrowing involves posting collateral (often >100% of the borrowed value) and paying interest to lenders. The interest rate is determined by the utilization ratio - how much of the pool's liquidity is currently borrowed.

Question 2

Why do lending protocol interest rates fluctuate?

Accepted Answer

Interest rates are algorithmically determined by the supply/borrow balance in each pool. When a pool is highly utilized (lots of borrowing relative to supply), rates increase to incentivize more suppliers and discourage borrowing. When utilization is low, rates drop. This is similar to how traditional interest rates work, but on-chain and in real-time with no bank middlemen.

Question 3

What is the safest lending protocol for new users?

Accepted Answer

Aave and Compound are generally considered the safest for new users due to their battle-tested code, multi-billion dollar TVL, and extensive audit history. Aave has added risk mitigation features like circuit breakers and oracle guardians. Both have operated without major exploits since launch. For risk-averse users, start with ETH or USDC supply on Aave V3.

Question 4

Can I lose money supplying to lending protocols?

Accepted Answer

Yes. Risks include: (1) Smart contract exploits - though major protocols have strong track records, (2) Liquidation risk if you supply collateral and borrow - your collateral can be liquidated if it falls below the required threshold, (3) Impermanent loss if the protocol uses your assets for liquidity provision, (4) Interest rate fluctuations meaning you may earn less than expected. However, the risk of losing your principal from smart contract failures on top-tier protocols is very low based on historical performance.

Question 5

What does TVL mean and why does it matter for lending protocols?

Accepted Answer

TVL (Total Value Locked) is the total value of assets deposited into a protocol. Higher TVL means more liquidity for borrowers, better interest rate stability, and generally more trust/security. It's often used as a proxy for protocol health and adoption. A protocol with $100M TVL offers more borrowing capacity and less rate volatility than one with $10M TVL.

Question 6

What is a healthy collateralization ratio?

Accepted Answer

Most protocols require borrowers to maintain collateralization above a minimum threshold (e.g., Aave V3 has a 110% minimum for most assets, meaning you must have $110+ of collateral for every $100 borrowed). A conservative position would be 200-300% collateralization to avoid liquidation risk during volatility. Higher collateralization = more safety buffer but less capital efficiency.

Question 7

What is the difference between Aave V3 and Compound V3?

Accepted Answer

Aave V3 offers multi-chain deployment, more assets, high efficiency mode (???? collateralization for stablecoin pairs), and more granular risk parameters. Compound V3 is more streamlined, focused on core lending with a simpler interface. Aave supports ~25 assets across Ethereum + L2s; Compound V3 supports fewer assets but with deeper liquidity per asset. Compound governance is also simpler with just two contracts (Comet and Comet Rewards).

Question 8

What is Morpho's unique value proposition vs Aave/Compound?

Accepted Answer

Morpho sits on top of Aave and Compound pools, matching lenders and borrowers at better rates via peer-to-peer optimization. It offers the same security (backed by Aave/Compound's $20B+ track record) but with ~20-30% higher APY for suppliers in many market conditions. Morpho Blue is their newer permissionless lending protocol with on-chain matching for any asset pair.

Question 9

What is MakerDAO's DSR (Dai Savings Rate) vs normal lending?

Accepted Answer

MakerDAO's DSR lets any ETH holder earn ~5%+ APY on their ETH by converting it to DAI and depositing it in the DSR contract. Unlike Aave/Compound where you earn variable rates, DSR is a stable rate set by Maker governance. It's considered very safe since DAI is over-collateralized and MakerDAO has over $4B in TVL. You can withdraw anytime with no lock-up.

Question 10

What happens to my assets during periods of high market volatility?

Accepted Answer

During volatility, the main risk is liquidation if you've borrowed. If the value of your collateral drops and your health factor falls below 1, your position can be liquidated at a penalty (typically 5-15% loss). For pure suppliers (no borrowing), your assets are generally safe - though protocol pause mechanisms may be triggered in extreme events to prevent cascading liquidations. Most protocols have circuit breakers that pause borrowing/liquidations during extreme conditions.

Protocol	Flash Loan Fee	Liquidation Bonus	Protocol Fee	Network Fee	Withdraw Fee
Aave	0.09%	5-10% (varies by asset)	10% of interest	Gas on L2s (~$0.01-0.05)	None
Compound	N/A	8.5% of collateral	None	~$1-5 on Ethereum	None
Morpho	N/A	5-10% (peer-to-peer)	5% of interest earned	Gas varies by chain	None
MakerDAO	N/A	13% flat on DAI debt	0.5-5% stability fee	~$1-3 on Ethereum	None (DSR)
Spark	0.09%	5-10% (inherited from Aave)	10% of interest	Minimal (Gnosis Chain)	None

Dimension	Aave	Compound	Morpho	MakerDAO	Spark
TVL	$9.8B	$2.3B	$680M	$4.7B	$1.2B
Supply APY (USDC)	~4.8%	~4.2%	~5.1%	~5.1% DSR	~4.9%
Borrow APY (USDC)	~6.2%	~5.8%	~5.9%	N/A (mint only)	~6.1%
Chain Count	12+	3	6+	Multi	Gnosis
Max Collateral LTV	90%	80%	85%	83%	88%
Flash Loan Support	Yes	No	No	No	Yes
High Efficiency Mode	Yes	No	Yes	No	Yes
Governance	AAVE token	COMP token	MORPHO token	MKR voters	Spark Governance
Oracle Source	Chainlink + custom	Chainlink	Chainlink + Pyth	Custom + Chainlink	Chainlink
Audit Count	15+ audits	10+ audits	8+ audits	12+ audits	6+ audits
Insurance Fund	Yes	Yes (Catheros)	Yes	Yes (Surplus)	Yes
Portals (UI)	Direct + 50+ 3rd party	Direct + 10+	Direct + 5	Oasis + 3rd party	Spark Portal
Native Stablecoin	No	No	No	DAI	No
Interest Rate Model	Variable + Stable	Variable	Variable (peer-matched)	Stability fee (fixed)	Variable + Stable
Launch Year	2020	2018	2022	2017	2023
Track Record	4+ yrs no major hack	6+ yrs	2+ yrs	7+ yrs	~2 yrs

Lending Protocol Comparison

TVL History - 12 Month Comparison

Best Protocol for You

Interest Rate Comparison

Aave

Pros

Cons

Compound

Pros

Cons

Morpho

Pros

Cons

MakerDAO

Pros

Cons