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苏·Xu · 2022年10月28日

put call parity

NO.PZ2018062007000083

问题如下:

Based on put–call parity, which of the following combinations results in a synthetic long asset position?

选项:

A.

A long call, a short put, and a long bond

B.

A short call, a long put, and a short bond

C.

A long call, a short asset, and a long bond

解释:

A is correct. One can synthetically create a long asset position by buying a call, shorting a put, and buying a bond.

B is incorrect because combining a short call and a short bond with the right to sell (not buy) another asset via a long put could not result in a new synthetic long asset position.

C is incorrect because combining a long call, a short asset, and a long bond creates a long put, not a synthetic long asset.

中文解析:

本题考查put-call parity

c+k=p+s

变形得s=c+k-p

正号为long,负号代表short

如何理解asset position?

1 个答案

Lucky_品职助教 · 2022年10月30日

嗨,从没放弃的小努力你好:


asset position中文就是资产头寸的意思,也就是手里有什么资产,是long还是short。

用大白话来说,position头寸其实就是款项的意思,作为专业术语的头寸,也称为“头衬”,是一种市场约定,承诺买卖合约的最初部位,买进合约者是多头,处于盼涨部位;卖出合约者为空头,处于盼跌部位。

很多人觉得费解,直接说款项不就好了么,为啥要叫头寸呢?这其实是有历史出处的。光绪年间,各省铸造的银元重量和成色不统一,数量上也很难控制。辛亥革命后,各省因急于用款,加工赶铸银元,滥铸铜圆,滥发钞票和军用票,导致本来就混乱的币制更是乱上加乱。清朝灭亡之后,袁世凯出任大总统。恰逢当时,北洋政府想借助货币改制来解决军费问题,于是便决定铸发货币,来一场币制改革。袁世凯为了提高自己的统治地位,把自己的头像铸在币面上,于是就有了“袁大头”这个词。

当时银行用于日常支付的就是“袁大头”,而10个“袁大头”摞起来的高度,恰好是一寸,“头寸”这个词便是由此而来的。

后来,银行逐渐用头寸代指资金数量,来表示款项,然后这个词就一直沿用至今了。收多付少,叫做“多头寸”;收少付多,叫做“缺头寸”;结算收付差额,叫做“轧头寸”;借款弥补差额,叫做“拆头寸”;想方设法调进款项,叫做“调头寸”;暂时未用款项大于需用量,叫做“头寸松”;资金需求量大于闲置量,叫做“头寸紧”。

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NO.PZ2018062007000083问题如下Baseon put–call parity, whiof the following combinations results in a synthetic long asset position? A.A long call, a short put, ana long bon.A short call, a long put, ana short bonA long call, a short asset, ana long bon A is correct. One csynthetically create a long asset position buying a call, shorting a put, anbuying a bon B is incorrebecause combining a short call ana short bonwith the right to sell (not buy) another asset via a long put coulnot result in a new synthetic long asset position. C is incorrebecause combining a long call, a short asset, ana long boncreates a long put, not a synthetic long asset. 中文解析本题考查put-call parityc+k=p+s变形得s=c+k-p正号为long,负号代表short 看其他答案,说k是bons是stock,这是为什么呢?讲义上K是执行价格X的折现,s是unrlying,也没说是某种特别的资产类型呀。

2022-05-04 23:53 1 · 回答

请问这道题能用c+k=p+s来吗 要是能的话能细说一下吗

2020-09-25 01:43 1 · 回答

A short call, a long put, ana short bonA long call, a short asset, ana long bon A is correct. One csynthetically create a long asset position buying a call, shorting a put, anbuying a bon B is incorrebecause combining a short call ana short bonwith the right to sell (not buy) another asset via a long put coulnot result in a new synthetic long asset position. C is incorrebecause combining a long call, a short asset, ana long boncreates a long put, not a synthetic long asset. long call +long bon=long put+long stocklong bonshort call +long put+long stock为什么是b呢

2020-04-23 10:42 1 · 回答