The Chicago Butter and Egg Board, founded in 1898, was a spin-off entity of the Chicago Produce Exchange. In the year 1919, it was re-organized as the Chicago Mercantile Exchange (CME). Roots of the Chicago Butter and Egg Board are traceable to the 19th century.
Initially, the Chicago Butter and Egg Board traded only two types of contracts, butter and eggs. Over several decades, it evolved into the Chicago Mercantile Exchange (CME or the "Merc") which traded futures contracts and options contracts on over 50 products, from pork bellies to eurodollars and .
In 2007, the CME purchased the Chicago Board of Trade and the New York Mercantile Exchange ("NYMEX"), to form the CME Group, Inc, the world's largest futures exchange.