Commodity Spread Option with Cointegration
Katsushi Nakajima () and
Kazuhiko Ohashi ()
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Katsushi Nakajima: Ritsumeikan Asia Pacific University
Kazuhiko Ohashi: Graduate School of International Corporate Strategy, Hitotsubashi University
Asia-Pacific Financial Markets, 2016, vol. 23, issue 1, 1-44
Abstract We derive the valuation formula of a European call option on the spread of two cointegrated commodity futures prices, based on the Gibson–Schwartz with cointegration (GSC) model. We also analyze the American commodity spread option including the early exercise premium representation and an analytical approximation valuation formulae with cointegration. In the numerical analysis, we compare the spread option values calculated by the GSC model and the Gibson–Schwartz (GS) model that ignores cointegration. Consistent with the intuition that the cointegration prevents the prices from diverging, the GSC model prices the commodity spread option lower than the GS model which have longer maturity of more than 6 years. In other words, the GS model may overprice the commodity spread options for those with longer maturity without taking account of cointegration. Thus, incorporating cointegration is important for valuation and hedging of long-term commodity spread options such as large scale oil refining plant developments.
Keywords: Cointegration; Commodity prices; Convenience yield; Energy; Spread option (search for similar items in EconPapers)
JEL-codes: G13 C32 Q40 (search for similar items in EconPapers)
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