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