204 Section 13: Investment Analysis
Example 2: The stock price six months from the expiration of an option is $42,
the exercise price of the option is $40, the risk-free interest rate is 10% per annum,
and the volatility is 20% per annum. Find Call and Put values.
Keystrokes
Keystrokes
(RPN mode)
(ALG mode)
f]
f[
.5n
.5n
10¼
10¼
42$
42$
20P
20P
40M
40M
t
t
~
~
Display
Time to expiry (years).
0.50
Interest rate (% per year).
10.00
Stock price.
42.00
Volatility (% per year).
20.00
Strike price.
40.00
Call value.
4.76
Put value.
0.81