. prior to the effective date , we from time to time entered into hedging contracts , which consist primarily of call options , collars ( consisting of a purchased call option and a sold put option ) and call spreads ( consisting of a purchased call option and a sold call option ) . heating oil , jet fuel and crude oil are the primary underlying commodities in the hedge portfolio . depending on movements in the price of fuel , our fuel hedging can result in gains or losses on its fuel hedges