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vazorg [7]
3 years ago
10

A stock price is currently $40. Over each of the next two three-month periods it is expected to go up by 10% or down by 10% (mea

ning, precisely, if the stock price at the start of a period is $40, it will go to $40*1.1=$44 or to $40*0.9=$36 at the end of the period and if the stock price at the start of a period is $44, it will go to $44*1.1=$48.44 or to $44*0.9=$39.6 at the end of the period). The risk-free interest rate is 12% per annum with continuous compounding. a. What is the value of a six-month European put option with a strike price of $42? b. What is the value of a six-month American put option with a strike price of $42? c. What is the value of a six-month American put option with a strike price of $45? What do you conclude about whether or not it is optimal to exercise this American option immediately (Hint: What would be the value of this American option if it were to be exercised immediately)
Business
1 answer:
ad-work [718]3 years ago
4 0

Answer:

Explanation:

The Risk neutral probability is given by

e rt − D / U-D

U=1.1

D=0.9

R=0.12

T=3/12

π u = e∧ 0.12 ∗ 3 / 12 − 0.9 /1.1 − 0.9

 =0.652

π d = 1− 0.652 = 0.348

The values of american and european options at each node is given in the following table.

                                    0.652  

                                                                                                    0  

                                                                0.81   48.4  

                                                                0.652    

                                                                0.81    

American option value     2.54         44    

probability                    0.652/0.3478'  

Option value                     2.12        2.4  

Futures price                        40           6      39.6  

                                                               0.3478    

                                                               4.76    

                                                                  36    

                                                                                           0.3478  

                                                                                           9.6  

                                                                                          32.4  

Time period                         0      3           6

the value at up node at 3 months is given by = ( 0.652∗ 0 ) + ( 0.3478 ∗ 2.4 )/e ∧0.12 ∗ 3 / 12 = 0.81

Hence, value of european put option =$2.12

Value of American put option = 2.54

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