> ## Documentation Index > Fetch the complete documentation index at: https://docs.yield.xyz/llms.txt > Use this file to discover all available pages before exploring further. # Optimized Allocator Vaults (OAVs) > OAVs (Optimized Allocator Vaults) are how you earn management and performance fees on Earn: audited ERC-4626 vaults that Yield.xyz deploys and operates with your fees, in three kinds: Meta Vaults, Sentinel Vaults and single-strategy OAVs. **New launch.** [Meta Vaults](/documentation/earn/oavs/meta-vaults/index) are live. A Meta Vault spreads one deposit across the strategies you choose, and your users see one balance and one blended APY after your fees. OAVs (Optimized Allocator Vaults) are how you earn management and performance fees on Earn. Yield.xyz deploys and operates these audited ERC-4626 vaults, which wrap yield strategies with your fees. Users hold vault shares in their own wallets, so rebalancing, compounding and responding to a risk event don't require them to sign anything. Funds can only move between the vault and its whitelisted strategies. Vault fees are paid by minting new vault shares to your fee recipient, so nothing is withdrawn from a strategy to pay you. A deposit fee can also be charged without a vault, through the FeeWrapper contract. For how vault fees fit with your other Earn fees, see [Earn monetization](/documentation/earn/monetization). ## The three kinds of OAV | Kind | What it does | Learn more | | - | - | - | | Meta Vaults | A vault of vaults that spreads one deposit across up to 10 whitelisted strategies. The user sees one balance and one blended APY after your fees. Weights are fixed or set by an optimizer, your own algorithm or a curator | [Meta Vaults](/documentation/earn/oavs/meta-vaults/index) | | Sentinel Vaults | Puts the deposit into one main strategy and watches it for exploits and depegs. It runs on the Meta Vault contract. When monitoring confirms a risk, a pre-signed pause stops the vault within seconds, then capital is withdrawn from the strategy and can move into a pre-approved fallback. Users don't need to migrate | [Sentinel Vaults](/documentation/earn/oavs/sentinel-vaults) | | Single-strategy OAVs | Wrap one fixed strategy in an ERC-4626 vault with your fees | [Single-strategy OAV](/documentation/earn/oavs/single-strategy) | How OAVs work: a user deposit goes into a Meta Vault, Sentinel Vault or single-strategy OAV, which sits on top of Earn yields In all three, the vault contract takes your fees, users hold ERC-4626 vault shares and deposits go only into the vault's configured strategies. Role holders operate the vault: harvesting, pausing and, for Meta and Sentinel Vaults, moving capital between strategies. Admin rights can stay with Yield.xyz, be shared with you through a joint multisig, or be handed to you entirely. The operator and monitoring wallets can only rebalance or pause. See [Roles & signing](/documentation/earn/oavs/meta-vaults/vault-mechanics/roles-signing-models). ## How each OAV manages capital Meta and Sentinel Vaults hold deposits in an idle balance and allocate them to strategies, while a single-strategy OAV passes each deposit straight into its strategy. Every OAV reinvests incentive rewards and pays your fees as new vault shares. How each OAV manages capital: a Meta Vault holds deposits in idle and the keeper allocates them across up to 10 strategies, with withdrawals paid from idle first; a Sentinel Vault runs one main strategy and, when a risk is confirmed, pauses and moves the capital into a pre-approved fallback; a single-strategy OAV deposits straight into one fixed strategy. Fees on every OAV are paid as new vault shares ## Audits The Meta Vault and Sentinel Vault contracts were audited by Zellic in September 2026, and earlier vault generations by Zellic and Spearbit/Cantina. The reports are on the [Trust Center](https://trust.yield.xyz). The Meta Vault design is the subject of a pending US patent application (19/676,363, filed May 2026). ## Ownership boundary This section covers vault contracts Yield.xyz deploys and operates on your behalf. To enter a third-party protocol's own vault, such as a Morpho or Yearn vault, use a normal DeFi yield: see [Earn › DeFi › Vaults](/documentation/earn/defi/vaults/index). ## Configuring and monitoring vaults You request an OAV for your project in the [dashboard](https://dashboard.yield.xyz). Yield.xyz reviews the request, then deploys and maintains the contract. ## Next steps One deposit, one balance, one blended APY across the strategies you choose. One monitored strategy that pauses on a confirmed risk, exits and can move to a fallback. Single-strategy vaults with configurable deposit, performance, and management fees. Pre-deployed OAVs you can integrate without requesting a custom deployment. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.