On 1.1.18 coinbase will support bitcoin cash. What effect will this have on the price?
You have half information i guess.
URL :
https://support.coinbase.com/customer/portal/articles/2853600-bitcoin-cash---frequently-asked-questionsAs per there write up and what i can see is they are not going to support it. They are just going to clear there shoulders from the blame of " eating " users Bitcoin Cash which obviously got generated because a lot of BTC is stored in there wallets. So they are providing facility for there users to take off there Bitcoin Cash to there other wallets.
That is what i can read :-
Would I be able to buy/sell Bitcoin Cash on Coinbase?
For now, Coinbase plans on supporting bitcoin cash withdrawals. If this changes, we will notify all customers with an update e-mail.
Can I send bitcoin cash to Coinbase right now?
No.
Coinbase does not yet support the Bitcoin Cash blockchain. Do not send bitcoin cash to Coinbase.
Same thing they wrote for Bitcoin Gold ( BTG ) too.