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Use the Black-Scholes formula for the following stock: Time to expiration 6 months Standard deviation 41%...

Use the Black-Scholes formula for the following stock:

Time to expiration 6 months
Standard deviation 41% per year
Exercise price $42
Stock price $42
Annual interest rate 7%
Dividend 0

Recalculate the value of the call with the following changes:

a. Time to expiration 3 months
b. Standard deviation 20% per year
c. Exercise price $50
d. Stock price $50
e. Interest rate 9%

Calculate each scenario independently. (Round your answers to 2 decimal places.)

C rises or falls for a, b c d e ?

Value of the call option for a b c d e ?

Solutions

Expert Solution

Solution A>

The value of the option is $5.51. All the formula used are shown in the below excel.

Type of Option Call Option Formulas
Stock Price (S0) $          42.00
Exercise (Strike) Price (K) $          42.00
Time to Maturity (in years) (t)                0.50
Annual Risk-Free Rate (r) 7.00%
Annualized Volatility (σ) 41.00%
Option Price $            5.51 =$42*0.605-$42*0.96561*0.490
Additional Calculation Parameters
ln(S0/K)                   -  
(r+σ2/2)t              0.077 =(7%+(41%^2)/2)*0.5
σ√t              0.290 =41%*SQRT(0.5)
d1              0.266 =0+0.077/0.290
d2            (0.024) =0.266-0.290
N(d1)              0.605 =NORM.S.DIST( 0.266)
N(d2)              0.490 =NORM.S.DIST(-0.024)
N(-d1)              0.395 =NORM.S.DIST(- 0.266)
N(-d2)              0.510 =NORM.S.DIST(-0.024)
e-rt       0.96561 =EXP(-7%*0.5)

Solution B>

The value of the call falls in Scenario 2.

The value of the option is $2.58. All the formula used are shown in the below excel.

Type of Option Call Option
Stock Price (S0) $          50.00
Exercise (Strike) Price (K) $          50.00
Time to Maturity (in years) (t)                0.25
Annual Risk-Free Rate (r) 9.00%
Annualized Volatility (σ) 20.00%
Option Price $            2.58 =$50*0.608-$50*0.97775*0.569
Additional Calculation Parameters
ln(S0/K)                   -  
(r+σ2/2)t              0.028 =(9%+(20%^2)/2)*0.25
σ√t              0.100 =20%*SQRT(0.25)
d1              0.275 =0+0.028/0.100
d2              0.175 =0.275-0.100
N(d1)              0.608 =NORM.S.DIST(0.275)
N(d2)              0.569 =NORM.S.DIST(0.175)
N(-d1)              0.392 =NORM.S.DIST(-0.275)
N(-d2)              0.431 =NORM.S.DIST(-0.175)
e-rt       0.97775 =EXP(-9%*0.25)

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