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Betty · 2024年07月05日

这道题这样回答行不行

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NO.PZ202212300200004902

问题如下:

Explain why each of the following option strategies is less appropriate than a straddle, given Jacob’s beliefs:

i. bull spread

ii. short butterfly spread

iii. zero cost collar

选项:

解释:

Correct Answer:

i. A bull spread would lose money if the U.K. loses the bid and the share price falls sharply, and would make only limited profits (compared to a straddle) if the U.K. wins the bid and the share price appreciates sharply.

ii. A short butterfly spread would make only limited gains when the share price either increases or decreases beyond the breakeven points.

iii. A zero cost collar would lose a limited amount of money if the U.K. loses the bid, and would make only a limited profit (compared to a straddle) if the U.K. wins the bid.

i)bull spread: net long duration, against bearish view, thus least appropriate.

ii)short butterfly spread, long bullet+short barbell, fits bearish view, eliminate.

iii)zero cost collar: S+P-C, downside protection, fits bearish view, eliminate.

2 个答案

pzqa27 · 2024年07月08日

嗨,从没放弃的小努力你好:


这样回答不算踩在点上,题目要求我们对比这三种策略和straddle,其实是想让我们描述下这三种策略为什么不满足题目描述的情况。

i)bull spread: net long duration, against bearish view, thus least appropriate.

bull spread这个里面跟duration没有什么关系,它是同种期权买低卖高构建的,主要问题是当股价大幅下跌,牛市价差就会亏损,当股价大幅上涨,牛市价差只能获得有限的利润,因此不选。

ii)short butterfly spread, long bullet+short barbell, fits bearish view, eliminate.

这里short butterfly spread跟bullet 和barbell没什么关系,这样的描述可能会在考试中认为是错误的描述而导致扣分。其次,这个策略的主要问题是只能获得有限的profit,因此“fits bearish view”不算一个理由。

iii)zero cost collar: S+P-C, downside protection, fits bearish view, eliminate.

它的问题是当股价下跌的时候会有损失,股价上涨的时候收益有限,而“ fits bearish view”不算一个主要理由。

综合来说这个题并不算踩点。

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

pzqa27 · 2024年07月05日

嗨,爱思考的PZer你好:


这样的回答可能会扣分。第一,如果可以的话,请尽量写完整的句子。 第二,“S+P-C”这种最好是用语言描述一下,“long stock,short call and long put”。

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努力的时光都是限量版,加油!

Betty · 2024年07月05日

我想问的是,这个题的回答有没有答到点上?

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