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临江仙 · 2020年03月13日

问一道题:NO.PZ2020021203000091

问题如下:

"The higher interest rates are, the easier it is for a bank to create a principal protected note." Explain this statement.

选项:

解释:

In a principal protected note, the price of a call option has to be greater than the difference between S and PV(S). As interest rates increase, the difference becomes greater. Thus, it is easier to create a principal protected note.

看不懂这个英文答案,请指导

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已采纳答案

品职答疑小助手雍 · 2020年03月14日

同学你好,因为PPN相当于就是一个零息债+一个看涨期权。零息债现在价格是PV(X),期权价格是C,未来行权价是X。

所以这个组合未来的价值要么是X(期权未行权),要么是期权标的的将来值(大于X)。

这个时候显然是如果PV(X)越小X(也就是X和X的现值的差越大),也就是前期的投入越便宜,它就越有吸引力越容易被create。

Lucy · 2020年03月16日

请问这样期权价格就越大,期权越贵,为何会更有吸引力呢?

品职答疑小助手雍 · 2020年03月16日

这点原版书里也没有提,这个策略本身就是一个连rf都放弃的保底策略,我觉得它是假设了期权的价格不变,才会说这种有吸引力之类的话的,这部分原版书也就一段话概括了下,了解即可。

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