Question 1

What is the safest DeFi yield?

Accepted Answer

The safest DeFi yields come from battle-tested lending protocols like Aave and Compound, where you supply stablecoins (USDC, DAI) and earn 3-6% APY. These protocols have been audited dozens of times, have billions in TVL as a security buffer, and use overcollateralized lending so borrowers must deposit more than they borrow. Liquid staking through Lido (stETH) and Rocket Pool (rETH) is also considered low-risk, earning 3-3.5% APY backed by Ethereum's proof-of-stake rewards. The tradeoff is lower returns compared to newer, riskier protocols.

Question 2

How are DeFi yields generated?

Accepted Answer

DeFi yields come from four main sources: (1) Lending interest — borrowers pay interest to use your deposited assets, and you earn a share of that interest. Aave and Compound work this way. (2) Staking rewards — proof-of-stake blockchains like Ethereum pay validators for securing the network, and liquid staking protocols pass those rewards to depositors. (3) Trading fees — liquidity providers on DEXs like Uniswap earn a cut of every swap that uses their liquidity. (4) Token incentives — protocols distribute their governance tokens to attract liquidity (yield farming). Sources 1-3 are sustainable; source 4 depends on the token maintaining value.

Question 3

What is impermanent loss risk?

Accepted Answer

Impermanent loss (IL) occurs when you provide liquidity to a DEX like Uniswap and the price ratio between your two tokens changes. If ETH rises 50% while you hold ETH/USDC LP tokens, your position is worth less than if you had simply held the tokens separately. The loss is 'impermanent' because it reverses if prices return to their original ratio, but it becomes permanent when you withdraw. For volatile pairs like ETH/USDC on Uniswap V3, IL can exceed 10-20% during large price swings. This is why concentrated liquidity positions show high APY — the trading fees must compensate for IL risk.

Question 4

Is 10%+ APY sustainable in DeFi?

Accepted Answer

It depends on the source. Some 10%+ yields are sustainable: Ethena's sUSDe earns from futures funding rates (a real market mechanism), and Kamino on Solana benefits from high on-chain lending demand. However, many 10%+ APYs are inflated by temporary token incentives that decrease over time. A good rule of thumb: if the yield comes from real economic activity (lending interest, trading fees, staking rewards), it is more likely sustainable. If it comes primarily from token emissions, it will compress as more capital enters and token prices decline. Always ask: where is the yield coming from, and who is paying it?

Question 5

What is the difference between APY and APR?

Accepted Answer

APR (Annual Percentage Rate) is the simple interest rate without compounding — if you earn 1% per month, your APR is 12%. APY (Annual Percentage Yield) includes the effect of compounding — reinvesting your earnings so you earn interest on your interest. That same 1% monthly rate compounds to 12.68% APY. The difference grows with higher rates and more frequent compounding. A 50% APR compounded daily becomes roughly 64.8% APY. In DeFi, most protocols advertise APY because it looks higher. When comparing opportunities, make sure you are comparing the same metric. Some yields (like Pendle fixed-rate) auto-compound, while others (like Uniswap LP fees) require manual reinvestment.

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