Chicago Mercantile Exchange - CME

What Does Chicago Mercantile Exchange - CME Mean?
The world's second-largest exchange for futures and options on futures and  the largest in the U.S. Trading involves mostly futures on interest rates, currency, equities, stock indices and a small amount on agricultural products.

Investopedia explains Chicago Mercantile Exchange - CME
Founded in 1898 as a not-for-profit corporation, the CME was called the Chicago Butter and Egg Board until 1919. In November 2000, CME became the first U.S. financial exchange to demutualize and become a shareholder-owned corporation.

The trading of futures and options on futures provides a way to protect against and profit from price changes in financial instruments and physical commodities.