Uniswap Labs Introduces Dynamic Fee Mechanism for Stable Pairs

Uniswap Labs has launched StablePair Hook, a new dynamic-fee mechanism designed for stable pairs on the Uniswap Protocol. This feature is now live on Ethereum mainnet with two pools, USDC/USDG and USDC/USDT.

Stable pairs are among the most traded markets in DeFi, with stablecoin-to-stablecoin swaps reaching $43.4 billion in the second quarter of 2026 alone. However, static fees often favor arbitrage bots over the pool itself.

The new StablePair Hook addresses this issue by introducing a dynamic fee that adjusts based on how far the pool has drifted from its true rate or reference price. Within a tight band around the rate, the fee adjusts under every swap to quote a fixed bid/ask spread. When the price drifts outside this band, swaps that push the price further off pay no fee.

Uniswap Labs is building hooks with issuers and LPs who use them, open sourcing them so teams can start from working code. This is part of Uniswap's efforts to evolve market structure and give every pool the ability to set its own rules, fees, and pricing logic.