> For the complete documentation index, see [llms.txt](https://docs.aera.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aera.finance/v2-archive/concepts/vault-assets.md).

# Vault Assets

Aera Vaults are developed to hold and rebalance two or more ERC20/ERC4626 assets.

### ERC20 Assets

One of the ERC20 assets is designated as the numeraire asset.

One of the ERC20 assets is designated as the fee token (this could overlap with the numeraire asset)

Each ERC20 asset has to specify a Chainlink-compatible oracle contract for pricing purposes against the numeraire asset.

### ERC4626 Assets

ERC4626 assets are supported to incorporate yield strategies in Aera.

The built-in oracle is used to price these assets.

The underlying asset of an ERC4626 has to be a supported ERC20 asset in the vault.


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