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Monthly Archives: May 2018
向上敲出障碍期权
我自认为自己对于普通期权,和普通期权组合的性质,还是比较熟悉的,最重要的是普通期权是平滑的,在我们交易时,持仓主要也是在平值附近,不会有意在特别虚值的地方,持有很多头寸。 实际上,如果我在持仓了特别虚值的头寸,我基本上有很强的信心,标的价格不会跑到这个虚值期权的行权价附近,也就是说,这些虚值期权的影响不会被激活(并不总是这样,我的判断也错过)。 但是,对于场外期权,就不是一回事情了。因为场外期权的希腊字母,和普通期权的性质大不一样,用原来的经验,往往会出现自以为是的错误认识。 目前我接触的最多的就是这种向上敲出的看涨期权,很多产品把他叫做鲨鱼鳍。比如,我们常见的期权价格和时间的关系,时间越长,期权价格越高,对于这种期权就是不成立的,实际上他是越短越值钱。 期权价值和时间的关系,还是比较容易理解和观察到的,更复杂的是,期权的delta和时间的关系,上图就能看到,delta在前期是一个稍有减少,然后迅速攀升的过程。那么在这个迅速攀升的过程中,如何让你的对冲头寸能追的上delta的变化,实际上是一件很困难的事情。 绘制一个三维图展示一下情况 这里delta为负的那一段是比较特别的,其他地方都不需要特别在意。这个区域不大,当然和波动率又有关系,对于15%的波动率 期初是平坦地带发行,那么发行后能做的,我觉得就是祈祷好了