Miami International Holdings Reports September 2018 Trading Activity for MIAX Exchange Group Press Release Press Releases October 5, 2018October 8, 20180 PRINCETON, New Jersey, Oct. 5, 2018 /PRNewswire/ -- Miami International Holdings, Inc. today reported the September 2018 trading activity for its two fully electronic options exchanges – MIAX Options® and MIAX PEARL™ (together, the MIAX