> ## Documentation Index > Fetch the complete documentation index at: https://docs.ondo.finance/llms.txt > Use this file to discover all available pages before exploring further. # USDY Price Oracle Starting November 1, 2026 at 00:00 UTC, the USDY price on Ethereum, BNB Chain, Mantle and Tempo comes from the `ContinuousPriceOracle` contract and rises continuously instead of once a day. > [!WARNING] > > **Important for integrators:** The new oracle does not support `getPriceHistorical`. The `USDYOracleWrapper` has never supported it, so nothing changes if you read the wrapper. If your integration calls `getPriceHistorical` on the previous oracle directly, you will need another way to get USDY prices from November 1, 2026 onward. ## How the price is calculated The oracle stores a price and a yearly rate (APY). Each time the price is read, the oracle calculates it: the stored price, grown continuously at that rate since it was stored. USDY therefore earns yield throughout the day, and rUSDY and mUSD balances grow at the same pace. ## Rate changes The rate stays in force until Ondo changes it, so the price continues to accrue at that rate without a daily update. Ondo can schedule a new rate to start at a future time. A routine change is limited on-chain to 10% of the current rate (for example, at 3.75% APY, about 0.375 percentage points) and to once every 8 hours. Changes larger than this, or sooner than 8 hours after the last one, can only be made through a timelock. The `ContinuousPriceOracle` contract was audited by Spearbit (March 2025) and Cyfrin (October 2026). See [Smart Contract Audits](https://docs.ondo.finance/audits.md). ## What changed Before November 1, 2026, the USDY price came from the Dynamic Rate Oracle, which added a full day of yield at 00:00 UTC and needed a new rate range every month. | | Previous oracle (Dynamic Rate Oracle) | New oracle (ContinuousPriceOracle) | | :- | :- | :- | | How the price moves | Once a day, at 00:00 UTC | Continuously | | How the rate is set | Daily rate for a fixed date range | Yearly rate that stays until changed | | If no update is made | Price stops growing at the end of the range | Price continues to accrue at the current rate | ## For integrators Read the USDY price from the `USDYOracleWrapper` for your chain, listed on [Smart Contract Addresses](https://docs.ondo.finance/addresses.md). The wrapper always points to the current USDY oracle, so integrators reading it don't need to do anything at the switchover or at any future oracle change. The `ContinuousPriceOracle` addresses are listed there for reference. If you calculate the USDY price off-chain, switch to the continuous calculation. The new oracle supports `getPrice()` and `getPriceData()`, which never revert. It does not support `getPriceHistorical`. The previous oracle is expected to be deprecated on December 31, 2026. After that it receives no new rate and is paused, so `getPrice()` and `getPriceData()` on it will fail instead of returning an outdated price. Integrators that read it directly should move to the `USDYOracleWrapper` before then. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.