Uniswap Brings Dynamic-Fee Hook to Robinhood Chain With a 2 Basis Point Spread

Uniswap's VolatilePair hook has landed on Robinhood Chain. The dynamic-fee mechanism went live for an ETH/USDG pool, and it's already processing trades — transaction records show a completed swap after the pool was initialized onchain on Oct. 29 at 7:28 p.m. ET. Uniswap announced the expansion on Nov. 2.

The numbers tell a story of a leaner pool doing more work. Around 10:11 a.m. ET on Nov. 2, Uniswap's Robinhood pool page showed roughly $3.5 million in total value locked and $24.9 million in 24-hour volume. About a minute later, the Ethereum ETH/USDC VolatilePair pool — announced back on Oct. 14 — sat at $4.5 million locked and $7.4 million in daily volume. Less capital on Robinhood, more than triple the trading.

The hook's whole trick is that it doesn't charge a flat rate in both directions. VolatilePair recalculates using recent pool-price movements: when ETH's pool price climbs, the permanent buying fee climbs and the selling fee drops by the same amount. A falling price flips that. There's also a separate temporary charge on trades that reverse a price move, and extra fees can stack up as prices move inside a single block. Per Uniswap's technical docs, the algorithm reads pool price, block number and trade direction — never the trade amount.

For liquidity providers, the bet is keeping more of the value that fast traders normally skim off price gaps. For traders, it means buying and selling can cost different amounts, and a reversal trade can carry a surcharge.

The Robinhood pool was set up with a resting spread of 2 basis points — the sum of its two permanent directional fees — compared with 8 basis points on Ethereum. At the neutral starting point, that's 1 basis point per direction versus 4 before any temporary or within-block additions, according to the pools' initialization records and the hook's fee configuration definitions.

It's not just the fee math that's different. Robinhood Chain, an Ethereum-compatible Layer 2, pairs ETH with USDG instead of USDC. USDG is a Paxos-issued dollar stablecoin that its issuer says redeems one-for-one for U.S. dollars. Uniswap Labs sets the initial pool configuration, while Uniswap governance controls later parameter changes and hook upgrades. The pool page also lists a 50,000 USDG liquidity-rewards allocation running Oct. 30 through Nov. 12.