Consider a stock, the current price (So) of which is $30. We model stock-price evolution using a Binomial model. In every three-month period, u = 1.1052 and d = 0.9048. The risk free rate of interest is 5% per annum continuously compounded. The four-step Binomial tree is shown below: 30 Node Time: 0.0000 33.16 Payoff= 27.15 0.2500 36.64 30.00 24.56 0.5000 40.50 33.16 27.15 22.22 0.7500 44.75 即訂 36.64 [max(S₂, S.)-min(S₁,S₂) if S4 ≥ 30 max(S₁, S₂, S3)-S4 if S₁ < 30 30.00 24.56 20.11 1.0000 A European-style exotic derivative has been written on this stock. The derivative has one year to expiry. Denote by S₁, S2, S3 and S, the stock price after three, six, nine and twelve months respectively. The payoff to the derivative is specified as follows: Required: Using a four-step Binomial framework and the risk-neutral approach, calculate the current value of this exotic derivative. Use continuous compounding for all present value calculations. Show all working.

Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
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Chapter1: Investments: Background And Issues
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Consider a stock, the current price (S.) of which is $30. We model stock-price evolution using a
Binomial model. In every three-month period, u = 1.1052 and d = 0.9048. The risk free rate of
interest is 5% per annum continuously compounded. The four-step Binomial tree is shown below:
44.75
40.50
36.64
36.64
33.16
33.16
30
30.00
30.00
27.15
27.15
24.56
24.56
22.22
20.11
Node Time:
0.0000
0.2500
0.5000
0.7500
1.0000
A European-style exotic derivative has been written on this stock. The derivative has one year to
expiry. Denote by S;, S2, S; and S4 the stock price after three, six, nine and twelve months
respectively. The payoff to the derivative is specified as follows:
[max(S2,S,)–min(S,,S,) if S, 2 30
Рayoff 3D
max(S,S,S,)-S,
if S, < 30
Required:
Using a four-step Binomial framework and the risk-neutral approach, calculate the current value
of this exotic derivative. Use continuous compounding for all present value calculations. Show all
working.
Transcribed Image Text:Consider a stock, the current price (S.) of which is $30. We model stock-price evolution using a Binomial model. In every three-month period, u = 1.1052 and d = 0.9048. The risk free rate of interest is 5% per annum continuously compounded. The four-step Binomial tree is shown below: 44.75 40.50 36.64 36.64 33.16 33.16 30 30.00 30.00 27.15 27.15 24.56 24.56 22.22 20.11 Node Time: 0.0000 0.2500 0.5000 0.7500 1.0000 A European-style exotic derivative has been written on this stock. The derivative has one year to expiry. Denote by S;, S2, S; and S4 the stock price after three, six, nine and twelve months respectively. The payoff to the derivative is specified as follows: [max(S2,S,)–min(S,,S,) if S, 2 30 Рayoff 3D max(S,S,S,)-S, if S, < 30 Required: Using a four-step Binomial framework and the risk-neutral approach, calculate the current value of this exotic derivative. Use continuous compounding for all present value calculations. Show all working.
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