What are DeFi vaults?
A DeFi vault is a smart contract that accepts deposits, issues shares, and runs a yield strategy. You put in USDC; the vault lends it to borrowers on Morpho or Aave or Compound; interest accrues; the vault compounds it; your shares become worth more USDC over time. When you redeem, you get back more than you deposited, minus whatever fees the vault charges.
Most modern vaults follow ERC-4626, an Ethereum standard that defines how deposits, withdrawals, and share accounting work. Before ERC-4626 existed, every protocol had its own vault interface: Yearn had yTokens, Compound had cTokens, Aave had aTokens. Integrating any of them required custom code. ERC-4626 replaced that fragmentation. A Morpho vault, a Yearn v3 vault, and an Euler v2 vault all speak the same interface, which means wallets, dashboards, and other protocols can plug into any of them without special handling.
The share price mechanism matters if you want to understand how vault returns actually work. When you deposit 1,000 USDC into a vault with a 1.0 share price, you get 1,000 shares. A month later the vault has earned interest and the share price is 1.004. Your 1,000 shares are now redeemable for 1,004 USDC. That 0.4% is your actual return, net of any fees the vault took. APY numbers on dashboards are annualized projections of this share-price growth rate, usually calculated from the last 7 or 30 days. They are not guarantees.
About the DIA Vault Map.
How vaults work under the hood
A user calls deposit() on the vault contract with some amount of the base asset. The vault mints shares proportional to the current exchange rate. Those shares are ERC-20 tokens, transferable and usable as collateral in other protocols.
The vault's strategy contract then allocates the pooled capital. In a simple lending vault on Morpho, this means supplying USDC to one or more isolated lending markets where borrowers post ETH, wstETH, or WBTC as collateral. Interest accrues block by block. The vault periodically harvests that interest and reinvests it (auto-compound), which increases the share price.
One detail that trips people up: rebasing vs. non-rebasing. Aave's aTokens are rebasing, meaning your balance increases automatically as interest accrues. Compound's cTokens are non-rebasing: the balance stays constant but the exchange rate to the underlying asset rises. Most ERC-4626 vaults use the non-rebasing model because it simplifies accounting and composes better with other contracts. If you see your vault share balance unchanged after a month, that is normal. The value per share went up, not the number of shares.
In curated vaults (Morpho's MetaMorpho, Mellow Core Vaults), a designated curator controls allocation parameters: which markets receive capital, maximum exposure per market, collateral whitelists. The curator has no custody. They cannot withdraw funds. Changes to parameters are subject to a timelock, typically 1 to 7 days, during which depositors who disagree can exit. A guardian address can emergency-pause or veto changes. These constraints are enforced at the contract level. The curator physically cannot exceed them. Vault Explorer.
Types of vaults
Lending vaults
Supply assets to borrowing markets, earn interest. Morpho, Aave v3, Compound v3, Euler v2, Fluid, Silo v2 all operate these. The yield comes from borrowers paying interest, which varies with utilization: more borrowing demand, higher supply rates.
Morpho's architecture is worth understanding because it is where most curated vault TVL sits. Morpho Blue is the base layer: a permissionless contract for creating isolated lending markets. Each market has one loan asset, one collateral asset, one oracle, one LTV, and one liquidation LTV. No governance. No upgradability. About 650 lines of Solidity. MetaMorpho vaults sit on top: a curator creates a vault that deposits into multiple Morpho Blue markets, giving depositors diversified lending exposure while the curator manages which markets and how much goes to each. Vault and lending platforms.
Yield aggregator vaults
Yearn Finance and Beefy harvest farming rewards, sell them, and re-deposit the proceeds. Continuous compounding without manual intervention. Yearn v3 has a modular architecture: strategy plugins can be swapped without migrating capital. Beefy runs across 25+ chains. The entire yield aggregator category on DefiLlama is around $1.6 billion TVL combined, about a quarter of what Morpho holds alone. The market has shifted toward curated lending vaults, but aggregators remain useful for auto-compounding LP positions and farming incentives on smaller chains.
Curated vaults
The curator model is the reason institutional capital entered DeFi vaults. Apollo Global Management (which manages $940 billion in traditional assets) signed a deal to acquire up to 9% of MORPHO's token supply over four years. Kraken launched DeFi Earn in January 2026, routing exchange deposits into on-chain vaults managed by Chaos Labs and Sentora. Bitwise deployed Morpho vaults targeting institutional depositors with ~6% APY through overcollateralized lending.
What makes curated vaults different from handing money to a fund: the curator has no custody. On Morpho, adding a new market or raising a supply cap triggers a timelock. During that window, any depositor can withdraw. A guardian address can veto. The contracts are immutable. The curator cannot move funds to an unauthorized protocol, because the contract rejects the transaction. Risk curators.
LP and delta-neutral vaults
LP vaults manage concentrated liquidity on DEXes like Uniswap v3. Arrakis Finance and Gamma Strategies automate range repositioning to capture trading fees. Delta-neutral vaults hold spot and short perps to collect the funding rate differential without directional exposure. If wstETH staking APY is ~5% and the average funding received on a short ETH perp is ~6% annualized, the gross carry is ~11% before fees and slippage. When funding flips negative or execution costs spike, the carry drops. These are structurally more complex than lending vaults and carry corresponding risk.
Strategies in practice
Single-asset lending
Deposit USDC into a Morpho vault curated by Gauntlet or Steakhouse. The curator allocates across lending markets where borrowers post ETH, wstETH, or WBTC as collateral. APYs fluctuate with borrowing demand, generally 3 to 8% for conservative stablecoin vaults. No borrowing leg, no liquidation exposure on your side. This is the baseline. Current lending rates.
The wstETH loop
The most popular leveraged vault strategy and worth understanding in detail. Deposit wstETH as collateral. Borrow ETH against it. Swap ETH for more wstETH. Deposit again. Repeat until you hit your target leverage. The reason this works: wstETH represents staked ETH that earns validator rewards, so the collateral appreciates relative to the debt (plain ETH). At 70% LTV, effective leverage is ~3.3x. If staking APY is 5% and ETH borrow rate is 3.5%, net APY is roughly 8.5% before swap costs and fees.
The risk: if the wstETH/ETH peg breaks (it has traded at a discount during stress events) or borrow rates spike above staking yield for extended periods, the trade goes underwater. Operating at 60 to 65% LTV instead of the maximum 70% gives a buffer.
Stablecoin carry
Kraken DeFi Earn is a stablecoin vault product with an exchange wrapper: deposit USDC on Kraken, Veda's infrastructure routes it into Morpho vaults managed by Chaos Labs and Sentora. Advertised up to 8% APY. The vaults lend to borrowers across Aave, Morpho, and Sky. If you already have a self-custody wallet, you can skip Kraken and deposit directly at app.morpho.org into the same underlying vaults.
LP and basis strategies
LP vaults on Uniswap v3 concentrate liquidity in active price ranges. Fee income depends on trading volume and how well the vault manages range width. Impermanent loss is the main risk. Basis trading (long spot, short perp) collects funding rate payments. Both strategies require active management and have more moving parts than lending vaults.
Risks
Smart contract risk
The most direct risk. Morpho Blue is 650 lines of immutable Solidity with multiple audits. A yield aggregator routing through Aave, Curve, and Convex has thousands of lines of smart contract surface area across four protocols. Each integration adds attack surface. Audits help but do not eliminate risk. Even mature, audited protocols have been exploited.
Isolated vs. pooled lending
Morpho Blue markets are isolated: one loan asset, one collateral asset, one oracle, one LTV. Bad debt in one market does not contaminate others. Aave v3 and Compound v3 use pooled markets where multiple collateral types back a shared lending pool. Pooled markets have more liquidity but also more contagion risk: if one collateral type crashes, it can create bad debt for all lenders in the pool.
Oracle risk
Lending protocols depend on price feeds to value collateral and trigger liquidations. If an oracle reports a stale or manipulated price, undercollateralized positions may not be liquidated in time, creating bad debt for the vault. In October 2025, a stress event showed how protocols using internal order book prices instead of multi-source, depth-weighted oracle feeds saw prices diverge sharply across exchanges, accelerating cascading liquidations.
Curator risk
Curated vaults depend on the curator's judgment. A curator could whitelist a risky collateral type, set LTV too aggressively, or fail to react when market conditions change. Timelocks, guardian vetoes, and on-chain caps limit this, but they do not eliminate it. Check how a curator handled past stress events before depositing. Governance data: timelocks, multisigs, owner types.
Liquidation and strategy risk
Any vault using leverage (looping strategies, leveraged staking) faces liquidation if collateral value drops below the threshold. LP vaults face impermanent loss. Stablecoin strategies face depeg risk. More complex strategies layer these: a leveraged wstETH vault has smart contract risk, liquidation risk, and LST depeg risk running simultaneously.
The vault ecosystem
The DIA Vault Map tracks six layers of the vault ecosystem. Asset issuers create the tokens vaults deploy into: stablecoins (USDC, DAI), liquid staking tokens (stETH, rETH), wrapped BTC (cbBTC, tBTC). Vault and lending platforms (Morpho, Aave, Compound, Euler, Fluid) are the smart contract layer.
Risk curators (Gauntlet, Steakhouse Financial, Block Analitica, RE7 Labs) manage vault parameters. Yield optimization protocols (Yearn, Beefy) handle auto-compounding. Infrastructure providers supply oracles, keepers, and bridges. Liquidity providers (DAOs, treasuries, institutional allocators) supply the capital.
Yearn built the first automated yield vaults in 2020. The curated model arrived with Morpho Blue in 2024. By early 2026, Morpho held ~$5.8 billion TVL, Kamino had ~$2.36 billion on Solana, and Pendle's yield tokenization sat at ~$3.5 billion across 11 chains. Kraken and Apollo have committed real capital. This is no longer experimental infrastructure.
Frequently asked questions
A smart contract that accepts deposits, issues shares (usually ERC-4626), and runs a yield strategy on your behalf. You deposit USDC or ETH, the vault lends it across protocols, compounds the interest, and your shares appreciate relative to the underlying asset. When you withdraw, you get back more than you put in, minus fees.
No. Smart contract bugs, oracle manipulation, bad debt from under-collateralized borrowers, and curator errors are all real risks. Safety varies by protocol: Morpho Blue is 650 lines of immutable code with multiple audits. A yield aggregator routing through four protocols has four times the smart contract surface area. Check audit history, TVL track record, and governance controls (timelocks, multisigs) before depositing.
Staking locks tokens to validate a proof-of-stake network. The reward rate is set by the protocol. Vaults pool capital and deploy it across lending markets, DEX liquidity positions, or funding rate trades. Vaults can change strategy, shift between protocols, and compound returns. Staking gives you one fixed yield source. A vault can give you several, with correspondingly more risk.
A standard interface for tokenized vaults on Ethereum. It defines how deposits, withdrawals, and share accounting work, so any protocol can integrate any ERC-4626 vault without custom code. Before ERC-4626, Yearn had yTokens, Compound had cTokens, and Aave had aTokens, all with different interfaces. ERC-4626 replaced that fragmentation. Morpho, Yearn v3, Euler v2, and most new vault protocols use it.
Vaults where an independent risk manager (the curator) controls allocation parameters instead of hardcoded strategy logic. The curator whitelists collateral, sets LTV limits, and moves capital between lending markets. Morpho popularized this with MetaMorpho vaults. The curator has no custody over funds and changes are subject to timelocks (typically 1 to 7 days), during which depositors can withdraw if they disagree.
Check the curator's track record during stress events, not just their APY. Look at on-chain parameters: which markets are whitelisted, what are the supply caps, how long is the timelock. Verify the smart contracts have been audited. Compare current APY against 30-day and 90-day historical performance, since point-in-time rates can be misleading. If you cannot find clear documentation about how the vault works, do not deposit.
An independent risk management firm that manages a vault's parameters. Gauntlet, Steakhouse Financial, Block Analitica, and RE7 Labs are examples. They are not part of the underlying protocol. Gauntlet does not work for Morpho. They set risk limits, choose which lending markets receive capital, and rebalance allocations. Most charge a 5 to 15% performance fee on generated yield.
Lending interest is the most common source: the vault supplies assets to borrowers who pay interest. Other sources include DEX trading fees (LP vaults), staking rewards (liquid staking vaults), protocol incentive tokens (yield farming), and funding rate differentials (basis trading vaults that are long spot and short perps). Most vaults auto-compound, meaning returns are reinvested rather than distributed.
