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上小学 · 2023年03月11日

此题看不懂,需要干啥?

NO.PZ2020021205000045

问题如下:

A trader wants to create synthetically a nine-month European put futures option on 1 million times an index. The futures price is USD 2,500, the strike price is USD 2,400, the risk-free rate is 2%, and the volatility of the futures price is 20%. What position should the trader take in futures contracts initially? How does this differ from the position the trader would take if he or she were hedging the same nine-month European put futures option on 1 million times the index?

解释:

The delta of a long position in a put option on a futures price is e-rT[N(d1 ) - 1]. In this case:

d1=ln(2,500/2,400)  +  (0.22/2)  X  0.750.20.75\frac{\ln(2,500/2,400)\;+\;(0.2^2/2)\;X\;0.75}{0.2\sqrt{0.75}}\\= 0.3223

and delta is

eo.o2xo.75e^{-o.o2xo.75}\\[N(0.3223) - 1] = -0.368

The trader should short futures contracts on 368,000 times the index initially to match the delta of the position that is desired. If the trader were hedging 1 million put futures contracts he or she would take a long position in futures contracts on 368,000 times the index.

请一步步写下这个题目要求干啥,解题步骤可以吗?跟任何例题也靠不上?多谢了

2 个答案

品职答疑小助手雍 · 2024年07月26日

第一步的d1算错了,用我上面回答里红框截图的d1的公式。

品职答疑小助手雍 · 2023年03月12日

同学你好,直接用题目给的条件套用下图1红框里的公式求出来index的put option的delta;

再根据下图2,future的delta要多乘一个e的-rt次方。最终得到future put option的delta。

根据题目,本题问的是问题1:模拟这个option(的delta)需要多少future?以及问题2:对冲这个头寸的option(的delta)需要多少future?

求出来delta等于-0.368之后,

问题1:根据默认条件future的delta是等于1的(讲义534页讲过),模拟这个1million的put,就需要做空(short)0.368*1million=368000的期货。

问题2:对冲put反过来即可,所以就要long future,即做多(long)368000的期货。

这些知识点和类似的例题在希腊字母章节的delta hedge讲过。

Timedbean · 2024年07月26日

老师好。请问能帮我看看我的逻辑哪里错了吗 option on future, Step 1 用BSM 模型, 用FT/EXP(rT) 替换S0 来算D1 = (ln( (2500/EXP(2%*0.75)/2400)+(2%+0.2^2/2)*0.75)/(0.2*0.75) = 2.25 Step 2 查表N(d1) = 0.9877, Step 3 Put option deltal = N(d1) - 1 = - 0.01222

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NO.PZ2020021205000045 问题如下 A trar wants to create synthetically a nine-month Europeput futures option on 1 million times inx. The futures priis US2,500, the strike priis US2,400, the risk-free rate is 2%, anthe volatility of the futures priis 20%. Whposition shoulthe trar take in futures contracts initially? How es this ffer from the position the trar woultake if he or she were heing the same nine-month Europeput futures option on 1 million times the inx?p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #473f46}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #484045}span.s1 {color: #303b5f}span.s2 {color: #6b5547}span.s3 {color: #434c63}span.s4 {color: #695147} The lta of a long position in a put option on a futures priis e-rT[N( ) - 1]. In this case:=ln⁡(2,500/2,400)  +  (0.22/2)  X  0.750.20.75\frac{\ln(2,500/2,400)\;+\;(0.2^2/2)\;X\;0.75}{0.2\sqrt{0.75}}\\0.20.75​ln(2,500/2,400)+(0.22/2)X0.75​= 0.3223p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #474445}anlta ise−o.o2xo.75e^{-o.o2xo.75}\\e−o.o2xo.75[N(0.3223) - 1] = -0.368The trar shoulshort futures contracts on 368,000 times the inx initially to matthe lta of the position this sire If the trar were heing 1 million put futures contracts he or she woultake a long position in futures contracts on 368,000 times the inx.p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #474347}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #4a4449}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #443e42}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #474445}p.p5 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #4031}p.p6 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #484349}p.p7 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #4c454c}p.p8 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helveticcolor: #463e46}span.s1 {color: #4b586c}span.s2 {color: #635b63}span.s3 {font: 6.0px Helveticcolor: #515f7b}span.s4 {color: #7b7b7b}span.s5 {color: #777373}span.s6 {font: 6.0px Helvetica}span.s7 {color: #565663}span.s8 {color: #4a5465}span.s9 {color: #665047}span.s10 {color: #354067} 如标题

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2023-06-08 11:47 1 · 回答

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2023-03-31 22:29 1 · 回答