Uniswap Introduces Dynamic Fees for USDC/USDT and USDC/USDG Stable Pools
Uniswap launches dynamic fee tool for two stablecoin pools
Uniswap Labs has released a new feature called StablePair Hook. The tool lets the protocol change the fee that liquidity providers earn in two Ethereum pools that swap stablecoins: USDC/USDT and USDC/USDG.
Key points
- Fees now depend on how far the pool price is from a reference rate.
- Trades that move the price farther from the reference rate pay no fee; corrective trades pay a fee that starts high and drops each block.
- Pool parameters can be updated through Uniswap governance without moving liquidity.
- Stablecoin‑to‑stablecoin swaps on Uniswap reached $43.4 billion in Q2.
How the fee adjusts to price and trade direction
Each pool has a reference rate and a narrow price band around it. Inside the band, the fee changes to keep buy and sell quotes consistent. At the reference rate, both directions pay the same fee. Near the edge of the band, a trade that moves the price toward that edge sees its fee fall toward zero, while the opposite direction’s fee rises to about twice the band width.
Outside the band, a trade that pushes the price farther from the reference rate pays no fee because it does not correct a mispricing. A corrective trade that brings the price back into the band starts with a fee at the band edge and the fee decays once per block until the trade is executed.
What is confirmed
The StablePair Hook is live only for the two Ethereum pools mentioned. Uniswap Labs can create pools with this hook, and governance can later change the pool’s fee logic or other parameters. The fee mechanism does not remove price impact; large trades can still move the pool’s pricing curve and receive a worse average price.
Why it matters
By varying fees, Uniswap aims to keep stablecoin pools competitive while allowing liquidity providers to capture part of the arbitrage spread when the pool deviates from parity. This could make stablecoin swaps cheaper for users and more rewarding for providers.
