Uniswap Labs is developing an OUSD rewards hook for Uniswap v4 in collaboration with Open Standard, with the aim of automatically distributing Origin Dollar incentives to liquidity providers within the protocol. OUSD is a yield-bearing stablecoin, and the proposed mechanism could provide liquidity providers with an additional income stream beyond trading fees by embedding reward distribution in pool operations. Uniswap v4 hooks are customizable code extensions that can run during events such as trades and liquidity-position changes. OUSD is already live across the protocol, applications and API, but the complete technical design of the new hook has not been released. The initiative is aimed mainly at stablecoin pairs and remains in early planning; as of September 2026, Uniswap Labs has not announced a rollout date. It follows the September 2026 launch of the StablePair Hook, which introduced dynamic fees for stablecoin transactions on Uniswap v4, and the addition of 2025 tools in Uniswap's web application to improve liquidity providers' visibility into rewards. If launched, the OUSD hook could attract liquidity to stablecoin pools while demonstrating how v4 hooks can support targeted, pool-level incentives. Key details to watch include the technical design, launch date, eligible pools, and the size and distribution of OUSD rewards.