A.備兌開(kāi)倉(cāng) B.買入期權(quán) C.賣出期權(quán)
A.備兌開(kāi)倉(cāng)(賣認(rèn)購(gòu)期權(quán)); B.買入期權(quán)的權(quán)限; C.賣出開(kāi)倉(cāng)的權(quán)限;