200 Section 13: Investment Analysis

Example 1: An option has 6 months to run and a strike price of $45. Find Call and Put values assuming a spot price of $52, return volatility of 20.54% per month and a risk-free interest rate of 0.5% per month. Show how to change the time scale of the inputs between monthly and annual values.

Keystrokes

Keystrokes

Display

 

(RPN mode)

(ALG mode)

 

 

 

 

 

 

 

f]

f[

 

 

 

 

 

 

6n

6n

6.00

Time to expiry (months).

.5¼

.5¼

0.50

Interest rate (% per

 

 

 

month).

52$

52$

52.00

Stock price.

20.54P

20.54P

20.54

Volatility (% per month).

45M

45M

45.00

Strike price.

t

t

14.22

Call value.

 

 

~

~

5.89

Put value.

 

 

:gAn

:gAn

0.50

Years to expiry.

 

 

:gC¼

:gC¼

6.00

Yearly interest rate %.

 

 

:P

:P§

71.15

 

12gr§P12grP

Yearly volatility %.

t

t

14.22

Call value (unchanged).

 

 

:ngA

:ngA

6.00

Months to expiry.

 

 

:¼gC

:¼gC

0.50

Monthly interest rate %.

 

 

:P

:Pz

20.54

 

12grzP

12grP

Monthly volatility %.

The next example is Example 12.7 from Options, Futures, and Other Derivatives (5th Edition) by John C. Hull (Prentice Hall, 2002).

File name: hp 12c pt_user's guide_English_HDPMF123E27

Page: 200 of 275

Printed Date: 2005/8/1

Dimension: 14.8 cm x 21 cm