“…An increasing number of studies have discussed the flexibility and the benefit derived from the application of option contracts under different research backgrounds (Wang and Liu, ; Fu et al., ; Inderfurth et al., ; Feng et al., ; Xue et al., ). More and more companies, such as Sun, HP, IBM, and China Telecom, successfully adopt option contracts to purchase various inputs and obtain many real benefits (Nagali et al., ; Ren et al., ; Haksöz and Şimşek, ; Chen and Shen, ). For example, HP has established and employed a set of risk management plans based on option contracts to purchase components from suppliers, and has made savings of more than 15 million dollars.…”