UPD: BCH balances have been credited, Bitcoin Cash market is launched. More info here.
As you know, Bitcoin Cash hard fork successfully launched on August, 1st. As announced before, we are supporting the UAHF and are working hard to implement the respective changes to CEX.IO platform. Thus, CEX.IO team is currently busy with the calculation of BCH coins.
Soon you will be able to see your BCH balances on CEX.IO accounts. Thereafter, we will launch BCH market on the exchange by adding BCH trading pairs. Please pay attention that after BCH are credited to your accounts, BCH deposits and withdrawals will be unavailable for some time.
We kindly ask you for patience and assure you that we are working hard to credit BCH to your accounts.