Circle launched StableFX, its onchain foreign exchange platform, on the Arc blockchain on September 22, 2026, six days after Arc’s mainnet went live. The system enables institutional players to swap more than 20 fully reserved stablecoins with simultaneous atomic settlement, eliminating the counterparty risk inherent in traditional FX. The global FX market processes approximately $10 trillion daily, primarily through infrastructure that closes on weekends and requires one to two days for settlement. Arc offers deterministic sub-second finality and uses USDC for transaction fees, with over 100 institutional participants including BlackRock and Visa from day one.
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