# Vaults ## Loan Vaults Each Loan Vault is a unique smart-contract based on the ERC-4626 standard that has specific parameters, including: * Loan Type (e.g. open-ended or fixed term) * Eligible Collateral * ERC-20 Vault Token * Liquidity Asset (e.g. USDC, EURC) * Interest Rate * Exchange Rate * [Exchange Rate Method](/stablecoin-yield/product-overview/exchange-rates.md) * Cut-Off Times * Processing Times * Fees * User permissions For a list of active loan vaults and more information, see [here](/stablecoin-yield/stablecoin-yield-vaults.md). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.opentrade.io/stablecoin-yield/product-overview/vaults.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.