As you know there is an Upcoming Bitcoin Fork, which will result in creation of Bitcoin Cash (BCC/BCH on some exchanges). Ideally if you hold bitcoin you should also get same amount of Bitcoin Cash but for this to happen you must have access to your private keys.
This may not happen for you if you hold your currency on a certain exchange ( because when you store your currency on exchange - they own your private key).
Here I have tried to analyze the stance of some famous exchanges :
Kraken (YES) - This is a well known exchanges for Trading. It will be supporting Bitcoin Cash under the ticker (BCH). Link to official Announcement (http://blog.kraken.com/post/1150/bitcoin-cash-and-a-critical-alert-for-bitcoin-margin-traders/)
Bitfinex (YES)- Another big exchange, well known for its advance UI will be supporting Bitcoin Cash under the ticker (BCH). Link to announcment - https://www.bitfinex.com/posts/212
Poloniex (MAYBE) - One of the oldest crypto exchanges. They are still "Not Sure" about weather they should go with it. If you hold your bitcoin here. please move to a supported exchange or a Wallet where you own the private keys. Announcement Link - https://poloniex.com/press-releases/2017.07.24-Our-plans-to-handle-potential-BTC-network-disruptions/
Coinbase (NO) - The largest bitcoin exchange in US will NOT support this chain split ! Move your bitcoin somewhere else ! Link - https://blog.coinbase.com/update-for-customers-with-bitcoin-stored-on-coinbase-99e2d4790a53
BitStamp (NO)- The exchange with allows you to buy Cryptos form credit card has decided NOT to go with the split. Hence the users holding BTC on this exchange will not be getting Bitcoin Cash. Link to Announcement -https://www.bitstamp.net/article/bitcoin-hard-fork-our-position/
But Still the best way would be to use a hardware wallet or to use a Wallet where you own your private keys.
Happy Investing !!
