> For the complete documentation index, see [llms.txt](https://docs.sierra.money/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sierra.money/sierra/price-oracle.md).

# Price Oracle

As outlined in the [Exchange Rate Mechanism](/building-with-sierra/exchange-rate-mechanism.md) section, the RWA-backed vaults update once per business day and the DeFi-backed vaults update once per hour if sufficient yield has been generated.

We have partnered with [Redstone](https://www.redstone.finance/), a leading oracle provider, to publish SIERRA's exchange rate used for minting and redemptions. This data can be ingested by lending markets, curators and others to support SIERRA being used as collateral. Check out SIERRA's data on Redstone here: <https://app.redstone.finance/app/token/SIERRA_FUNDAMENTAL/>.