CHICAGO, July 3, 2018 /PRNewswire/ -- CME Group, the world's leading and most diverse derivatives marketplace, reached average daily volume (ADV) of 18.4 million contracts during the second quarter of 2018, up 12 percent from the second quarter of 2017. June 2018 ADV reached 17.8 million contracts, up 8 percent from June 2017. Open interest at the end of June was 115 million contracts, an increase of 2 percent from the end of June 2017, and up 6 percent from year-end 2017.