The Chicago Mercantile Exchange (CME) (often called "the Chicago Merc", or "the Merc") is an American financial and commodity derivative exchange based in Chicago and located at 30 S. Wacker Drive. Chicago Mercantile Exchange Center is an office complex of two towers in Chicago, Illinois. They were completed in 1987 and have 40 floors. Fujikawa Johnson designed the buildings. (wikipedia.org)