Ethereum Stablecoin Supply Share Rises to 87%

The mechanics of near-total chain concentration

When a single network carries nearly nine-tenths of the stablecoin float, its gas markets, oracle dependencies, and liquidation thresholds become the binding constraints on peg integrity across the entire market. Arbitrage loops that normally correct de-pegs across multiple chains now resolve — or fail to resolve — on Ethereum's block space first. A congestion event or validator-level reorganization on Ethereum is no longer a local issue; it propagates directly into the trading books of every major centralized and decentralized venue.

EURXT: a MiCA-constrained mint/burn path

Crédit Agricole's EURXT operates as an ERC-20 electronic money token issued by CACEIS, pegged 1:1 to the euro with reserves held entirely as cash on CACEIS Bank's balance sheet. About 20 million tokens were in circulation at launch, available initially to institutional investors and corporate clients of CACEIS.

The redemption path is structurally different from the open-market arbitrage that stabilizes USDT or USDC. A holder presents EURXT to CACEIS and receives euros, or deposits euros to mint new tokens. The smart contract enforces the ERC-20 interface, but the peg is collateralized off-chain by a regulated balance sheet. There is no on-chain liquidation engine, no algorithmic backstop — only the issuer's commitment to honor redemptions against attested reserves.

EURXT has already been used to settle a subscription into an Amundi tokenized money market fund, a transaction Crédit Agricole describes as the first subscription to a tokenized Luxembourg UCITS money market fund settled with a euro stablecoin in Europe. The transaction is a working test of the if-then sequence: tokenized fund units recorded on Ethereum, EURXT as the settlement leg, CACEIS as custodian and reserve manager. If any leg stalls — a reserve attestation delay, a smart contract pause, a regulatory freeze — the peg weakens without any on-chain cascade to trigger a correction.

Competitive positioning and stress-test limits

EURXT enters a regulated euro stablecoin field that already includes Circle's EURC and Société Générale Forge's EURCV. EURC remains the largest euro stablecoin by supply, while EURCV has developed primarily as infrastructure for institutional settlement and DeFi collateral. What distinguishes EURXT is the MiCA license and the direct CACEIS balance-sheet backing — a structure that prioritizes regulatory clarity over on-chain composability.

The theoretical limit of this model surfaces under stress. A bank run on CACEIS reserves translates directly into EURXT redemption queues, with no algorithmic mechanism to slow outflows. And as Ethereum's stablecoin share approaches near-total concentration, the chain's operational health becomes a single point of failure for the broader digital dollar market.

The leading indicators to watch: CACEIS reserve attestation cadence, on-chain redemption queue length, and gas-cost spikes during periods of stablecoin rebalancing. Those metrics will signal whether the peg holds under load — or whether the 87% concentration starts to function as a systemic risk rather than a measure of network dominance.