International Securities Exchange

Nasdaq announced it has agreed to acquire International Securities Exchange , an operator of three electronic options exchanges, from Deutsche Börse Group. ISE’s exchanges serve as the venues for more than 15% of trading in U.S. options. The deal is expected to close in the second half of 2016.
The battle for order flow among options exchanges is in full swing
CBOE Holdings Inc. opened at $32.80 on June 15, a 13% premium to its $29 initial public offering price announced the day before.