短語詞組短語Bear put spread 賣權(quán)看空價差;熊市看跌期權(quán)價差;賣權(quán)空頭價差;組郃bear butterfly spread 空頭蝴蝶式差額交易Bear call spread 買權(quán)看空價差;買權(quán)空頭價差;策略Bear Spread Strategy 價差策略calendar bear spread 日歷空頭套利vertical bear spread 垂直熊市差價horizontal bear spread 水平多頭價差 返回 bear spread