(f) The price of Stock Y, which is currently $80, can go to $120, $90, or $60 in 6 months' time. Security A pays $1 if the price of Stock Y in 6 months is $120, and zero otherwise. Security B pays $1 if the price of Stock Y in 6 months is $90, and zero otherwise. Security C pays $1 if the price of Stock Y in 6 months is $60, and zero otherwise. The prices of these securities are pa, PB , and pc, respectively. The discretely compounded risk-free interest rate is 5% per half-year (not annualised). When answering the questions below, explain your calculations. i. In the absence of arbitrage, what is the total cost of purchasing one unit each of securities A, B, and C? ii. If PB 0.2/1.05 - 0.190476, what is the value of a 6-month European call on Stock Y with an exercise price of $75?
(f) The price of Stock Y, which is currently $80, can go to $120, $90, or $60 in 6 months' time. Security A pays $1 if the price of Stock Y in 6 months is $120, and zero otherwise. Security B pays $1 if the price of Stock Y in 6 months is $90, and zero otherwise. Security C pays $1 if the price of Stock Y in 6 months is $60, and zero otherwise. The prices of these securities are pa, PB , and pc, respectively. The discretely compounded risk-free interest rate is 5% per half-year (not annualised). When answering the questions below, explain your calculations. i. In the absence of arbitrage, what is the total cost of purchasing one unit each of securities A, B, and C? ii. If PB 0.2/1.05 - 0.190476, what is the value of a 6-month European call on Stock Y with an exercise price of $75?
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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Transcribed Image Text:(f) The price of Stock Y, which is currently $80, can go to $120, $90, or $60 in 6
months' time. Security A pays $1 if the price of Stock Y in 6 months is $120, and
zero otherwise. Security B pays $1 if the price of Stock Y in 6 months is $90, and
zero otherwise. Security C pays $1 if the price of Stock Y in 6 months is $60, and
zero otherwise. The prices of these securities are pa, PB , and pc, respectively.
The discretely compounded risk-free interest rate is 5% per half-year (not
annualised). When answering the questions below, explain your calculations.
i.
In the absence of arbitrage, what is the total cost of purchasing one unit
each of securities A, B, and C?
ii.
If pg = 0.2/1.05 × 0.190476, what is the value of a 6-month European
call on Stock Y with an exercise price of $75?
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