Coinbase CEO Brian Armstrong said Wednesday that the exchange's decision to suspend BUSD trading was driven by liquidity concerns. "The reason we are doing this is because Paxos, the issuer of BUSD, has been ordered to stop producing it, so we are concerned about the liquidity of our customers," Armstrong said. As previously reported, Coinbase had said the reason for the removal was that BUSD no longer met its listing standards under its own internal monitoring and review process, but it did not provide any additional details.