Coinbase has initiated an auction mode for the CT-USD trading pair, requiring a minimum 10-minute window for limit orders to establish an opening price. During this phase, the exchange exclusively accepts limit orders with an Allow Taker designation, while market and post-only orders are prohibited.
Simultaneously, OKX has listed the CT/USDT pair, implementing a one-hour call auction from 09:00 to 10:00 UTC. Following the auction, OKX will restrict market orders for an additional five minutes to mitigate volatility before continuous spot trading commences.
This coordinated launch across two major exchanges follows a similar procedure Coinbase employed in May 2026 for the CTR-USD pair. The Concrete platform, which is the subject of these listings, operates as an institutional-grade asset management service on the Ethereum network.
