CBOE Holdings, Inc. engages in the operation of trading market. It primarily offers options market and offers trading in listed options through a single system that integrates electronic trading and traditional open outcry into a single exchange known as Hybrid trading model. It provides options on various market indexes in an exclusive basis, and futures contracts, as well as on non-exclusive multiply-listed options such as options on the stocks of individual corporations, and options on other exchange-traded products including exchange-traded funds and exchange-traded notes. The company was founded on 1973 and is headquartered in Chicago, IL.