call-spread warrant　

call-spread warrant　欧洲式跨价认股权证　

a call warrant is the right to buy a share at a predetermined price.Rather than taking the risk of buying the shares directly，you can buy a share through a call warrant.With trading call warrant you profit when the price of the underlying asset rises with call warrants.Or an option spread in which one has a long position in a call while having a short position on another call on the same underlying asset with a different strike price and/or expiration date.One uses a call spread to profit from price movements in the underlying asset.