Barrier Option – 界限期权

中文释义: 一种附加条件的期权，此类期权是否有效取决于标的资产的市价是否触及确定的界限(barrier)。界限期权可分触碰生效期权(trigger/knock-in option)及触碰失效期权(knock-out option)，前者是指只有在标的资产的市价触及确定的水准时期权才生效，後者则是在标的资产的市价触及约定水准时即失效。标的资产是指行使期权时可以买进或卖出的资产。

英文释义: An option, which is activated or de-activated once the price of the underlying financial instrument reaches a set level, known as the barrier. It can be categorized into either trigger or knockout options.