Yearn Finance - Automated Yield Vaults
Yearn Finance is the canonical automated yield aggregator. Its yVaults take your idle assets and deploy them into a constantly-rotating set of DeFi strategies - lending, LPing, staking - compounding returns automatically so you never have to. Depositors get the yield, Yearn takes a 2% management fee and 20% performance cut of profits.
Yearn by the Numbers
? Vault Architecture - How Your Capital Flows
1. You deposit USDC -> receive yvUSDC tokens at current share price
2. The vault's keeper reviews active strategies and deploys capital to the highest-yielding one
3. The strategy interacts with external protocols (Aave, Curve, Lido) to generate yield
4. Strategy harvests profits -> profits converted to more underlying -> share price increases
5. You withdraw by returning yvUSDC -> receive underlying USDC + all accumulated yield
Vault Types Covered
How Vaults Work
Deposit flow, yVault token mechanics, share price, strategy cycles, and the harvest process
Strategy Architecture
How Yearn's strategies interact with lending protocols, DEXs, and LP positions - risk scoring and monitoring
How Yearn works in 90 seconds
Yearn Finance is a suite of decentralized products, the most important of which are the yVaults. A vault is a smart contract that accepts a single asset type - USDC, ETH, WBTC, etc. - and deploys that asset into a ranked set of strategies that Yearn's risk team has approved. Each strategy is a separate contract that interacts with external DeFi protocols: supplying to Aave, providing liquidity to Curve pools, staking in Lido, or some combination.
What makes Yearn unique is the automation layer on top. Yearn's keepers constantly monitor which strategies are generating the highest risk-adjusted yield and automatically reallocate capital between strategies - a process called "harvest." When a strategy profits, the profit is swapped back to the vault's asset type and the share price increases. Depositors who hold yvTokens watch their balance of underlying asset grow without doing anything.
The vault mints yvTokens at a ratio of 1:1 with the underlying asset at the time of deposit. The key number to track is the share price - how much underlying each yvToken is worth. A share price of 1.15 means every yvUSDC is redeemable for 1.15 USDC. The share price starts at 1.0 and compounds upward over time as strategies harvest profits. Yearn takes a 2% annual management fee on deposits and 20% performance fee on profits above the high-water mark.
Key concepts
- yVault token (yvToken)
- The ERC-20 token you receive when you deposit into a Yearn vault. yvUSDC, yvETH, yvWBTC are the most common. The vault's share price - the amount of underlying each yvToken can redeem - compounds continuously as strategies harvest profits. You can hold yvTokens in any wallet or move them to other DeFi protocols; yield accrues automatically without claiming.
- Strategy
- A smart contract that deploys vault capital into external DeFi protocols. Strategies target specific yield sources: supplying to Aave for stablecoin yield, LP-ing to Curve for trading fees plus CRV emissions, or staking ETH in Lido for liquid staking yield. Each vault can have multiple strategies ranked by expected return; the keeper rotates capital to the best performer.
- Harvest
- The process by which a strategy reports profits to the vault. The strategy swaps any earned tokens (CRV, CVX, aTokens) back to the vault's asset type and calls
report()on the vault. The vault then mints new shares for the strategy equal to the profit minus the 20% performance fee. This is what causes the share price to rise over time. - Keeper
- An off-chain or autonomous on-chain agent that monitors vault health and strategy performance. The keeper decides when to reallocate capital between strategies, when to harvest, and when to trigger emergency shutdown. Yearn uses a combination of Gelato network keepers (automated bots) and community-run keepers.
- Risk scoring
- Yearn assigns each strategy a composite risk score from 1 (safest) to 5 (highest risk) across dimensions: TVL correlation, strategy complexity, smart-contract risk, and counterparty exposure. Depositors can see the risk breakdown on each vault's UI before depositing. Strategies with score 4-5 are typically only deployed in vaults that explicitly accept higher risk for higher reward.
- Emergency withdrawal
- If a downstream protocol shows signs of exploit, depeg, or governance attack, Yearn's multisig or governance can trigger emergency withdrawal. This halts new deposits and starts an unwind of all strategy positions. Depositors can still withdraw but may receive underlying assets with a delay depending on the liquidity of the strategy's positions.
Why Yearn matters
Yearn pioneered the automated yield aggregator concept and remains the largest in DeFi by TVL. As of April 2026 it manages over $500M across 200+ vaults on nine chains, generating millions in annual fee revenue for YFI stakers. Yearn's vault architecture - permissionless strategy deployment, on-chain risk scoring, and automated capital rotation - has been copied by dozens of protocols, but Yearn's first-mover advantage in strategy research and keeper infrastructure keeps it at the top of the heap.
The yVault product also demonstrates that passive yield can be formalized into a composable primitive. yvTokens are used as collateral in other protocols, are accepted as LP in Yearn's own strategy vaults, and have been used as yield-bearing collateral in undercollateralized lending experiments. Yearn's 2020 governance token airdrop to DeFi users also set the template for retroactive airdrops that the entire industry still uses today.
Frequently asked questions
- What makes Yearn different from manual yield farming?
- Yearn's vaults automate the entire yield optimization loop: constantly monitoring available strategies, automatically moving capital to the highest-yielding deployment, compounding returns, and reinvesting profits - all in a single non-custodial smart contract. A manual farmer would need to track APY changes, manually harvest profits, and redeploy capital across multiple protocols. Yearn does this continuously, 24/7, on-chain.
- How does Yearn manage risk across its vaults?
- Yearn uses a multi-layered risk framework. Each vault assigns a risk score (1-5) across dimensions: TVL correlation (does the strategy behave like the market?), strategy complexity, counterparty risk (which protocols does it interact with?), and smart-contract risk. Yearn's dedicated risk team reviews new strategies before deployment and can trigger emergency withdrawal if a downstream protocol shows signs of exploit or depeg.
- What is TVL and why does it matter for Yearn?
- TVL stands for Total Value Locked - the dollar value of all assets deposited into Yearn's vaults. Higher TVL means more capital is working, which increases protocol revenue from management and performance fees (typically 2% and 20% respectively). From a risk perspective, high TVL also means Yearn's strategies are significant players in the markets they operate in, so large withdrawals or strategy exits can move prices in the underlying protocols.
- How does Yearn's yVault share price work?
- When you deposit 1000 USDC into a USDC vault, you receive yvUSDC tokens. The number of tokens is fixed at deposit, but the underlying value per token grows over time as the vault harvests yields and the share price appreciates. The share price starts at 1.0 and compounds upward - if it reaches 1.15 after six months, your 1000 yvUSDC is now worth 1150 USDC. You withdraw by redeeming yvUSDC for the underlying asset.
- What happens when a strategy suffers a loss?
- Yearn uses profit-first accounting: when a strategy harvests profits, those profits are added to the vault's share price. When a strategy suffers a loss, Yearn's keepers report it and the vault's total assets decrease by the loss amount - which reduces the share price for all depositors proportionally. This is one of the key risks of yVaults vs. holding the underlying asset directly. Yearn has historically made depositors whole after some losses via treasury funds and emergency proposals, but this is not guaranteed.
- Which chains does Yearn operate on?
- As of April 2026, Yearn Vaults are live on Ethereum, Arbitrum, Optimism, Fantom, Polygon, Gnosis, BNB Chain, Base, and Avalanche - with Ethereum holding the majority of TVL. Yearn uses a multi-chain architecture where the same vault logic is deployed across chains but strategies are chain-specific since they interact with different lending markets and DEXs.
- What's the difference between a stablecoin vault and an ETH max-collateral vault?
- Stablecoin vaults (USDC, USDT, DAI, etc.) deploy capital into lending protocols like Aave/Compound or Curve stablepools - strategies targeting low-risk, steady yields with minimal principal volatility. ETH max-collateral vaults (like yvETH) treat ETH as the base asset and use strategies like liquid staking (stETH, rETH, wbETH) or ETH2x-FLI products to generate yield while keeping ETH exposure. The key difference is that stablecoin vault depositors never see their USDC amount change; ETH vault depositors see their ETH balance grow but still hold ETH.