Extended completes migration to Circle’s Arc with USDC and cirBTC collateral

Extended, a decentralized exchange built around perpetual contracts, has fully moved to Arc. Trading is live, with USDC and cirBTC as the accepted collateral. How the move went down The migration took place on October 22, 2026, at 13:00 UTC. Extended shifted its settlement infrastructure from Starknet to Arc, carrying approximately $120 million in total value locked (TVL) with it. Open positions and orders came along intact. Traders did not need to close out and rebuild their books on the other side. Deposits and withdrawals did pause briefly during the transition. Both have since been restored. The collateral menu changed, though. On Arc, Extended now accepts native USDC as its main collateral and cirBTC as its Bitcoin collateral asset. cirBTC is a token issued by Circle and backed 1:1 by Bitcoin. Two familiar assets did not survive the trip. USDT and wBTC are not supported on Arc. Users holding more than $1 of USDT or wBTC had to act by October 21, 2026. They could either withdraw or convert into USDC or cirBTC at a 1:1 rate plus a 0.50% premium. ETH holders got off easier. Their balances converted automatically to wETH during the migration. What Arc brings to the table Arc is Ci...