Yesterday Coinbase, San Francisco-based bitcoin exchange, announced it would allow customers to buy, sell, send and receive Bitcoin Cash.
However, BCH-USD trading was disabled after four minutes it had begun due to the significant volatility. According to Coinbase, it cancelled resting orders and cleared all BCH order books in order to ensure a fair and orderly market.
It is stated that BCH order books will be able on December 20th at 9:00am PST. All BCH order books will be available in post-only mode for a minimum of one hour to establish liquidity.
Source:
https://hype.codes/coinbase-pauses-bitcoin-cash-trading-right-after-launch
