The most important question at this point is which of these two blocks will be the "real" Bitcoin, and which will be called "BTC" in the stock markets. The Bitcoin stock exchange plays an important role at this stage as a person or organization is not held accountable for that.
Hong Kong-based digital money market Bitfinex is the world's largest stock exchange with its volume. The Bourse has announced that it will call the original quarterly coins "BTC" and the Coin of the SegWit2x chain "B2X".
Officially a stock exchange based in the Seychelles Republic, Bitmex is the second largest Bitcoin stock in the world by trade volume. In a blog post published on October 13, Bitmex announced that they will continue to list the original quarterly coins as "BTC".
Bitmex, on the other hand, stated that he could not list the coins in the SegWit2x chain as "ShitCoin2x".
It is not certain that Coinbase and possibly the GDAX will list the coins in the SegWit2x chain as "BTC" despite signing on NYA.

Explaining that the SegWit2x chain will now list the coins in the SegWit2x chain as "B2X", the company later made a new statement saying that it depends on the hash of which chain to accept as the original "BTC".@zer0hedge