Uniswap’s grip on stablecoin swaps sets up institutional test on Circle’s Arc
Uniswap now handles 57% of EVM stablecoin volume, positioning it as default liquidity venue as BlackRock and Visa back Circle's Arc chain.
Uniswap has become the default venue for stablecoin-to-stablecoin trading on Ethereum-compatible networks, a position that now underpins its role as launch-day liquidity provider on Circle’s forthcoming Arc blockchain. The decentralised exchange processes 57% of stablecoin swap volume across EVM chains, up from 43% at the start of the year, according to figures cited by Crypto Briefing.
The concentration matters beyond DeFi circles. Arc, a Layer-1 chain built by Circle specifically for stablecoin settlement, real-time payments and tokenisation, is due to open its public mainnet on 16 September. Its founding validator set includes BlackRock, DTCC, Visa, Mastercard and Standard Chartered — a roster that signals how far institutional finance has moved to embed itself directly in blockchain infrastructure rather than merely trade around it.
An anchor protocol for a dollar-denominated chain
Arc’s design is notable for making USDC its native gas token, meaning every transaction fee on the network is priced in dollars rather than in a fluctuating crypto asset. That structural choice is aimed squarely at institutions wary of volatility exposure when settling payments or moving tokenised assets on-chain.
Uniswap’s integration with Arc, announced in mid-June, was struck to give the new chain immediate access to established automated market maker infrastructure rather than waiting for liquidity to build organically. More than 100 builders were already active on Arc’s private mainnet as of August, with Aave and Aerodrome among the early participants providing lending, borrowing and additional liquidity venues from launch.
BlackRock has separately indicated it plans to deploy its BUIDL tokenised fund on Arc, using native USDC — a further sign that the chain is being built as much for asset managers and payment networks as for retail crypto users.
Scale and the competitive question
Uniswap’s cumulative trading volume has now passed $4.4 trillion, and its stablecoin market share has climbed 14 percentage points in a matter of months. That trajectory has coincided with a rally in UNI, the protocol’s governance token, as traders position for what wider adoption on Arc could mean for the exchange’s fee revenue.
Yet Uniswap’s position on Arc is not guaranteed to replicate its dominance elsewhere. Aerodrome, also confirmed as an Arc participant, could compete for the same liquidity pools once the chain opens to the public. The real test arrives on 16 September, when trading volumes on Arc will show whether the presence of validators such as BlackRock, Visa and Mastercard translates into genuine institutional flow — or remains, for now, a credibility signal rather than a liquidity one.
For regulators and market infrastructure watchers, the episode is a reminder that decentralised exchanges are increasingly being wired directly into chains designed with compliance-minded institutions in mind. Whether that blurs the line between DeFi and regulated payment rails — and how supervisors in London, Brussels and Washington respond — is likely to become a more pressing question once Arc’s mainnet volumes are visible.
Read more: Circle’s Arc mainnet hands stablecoin rail control to Wall Street’s biggest names
