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Black & Scholes: Let's price with it !
Issued on July 22 2011 par Strategies-options.com

It's time to use a spreadsheet to price an option using Black-Scholes.
I - VARIABLES AND PARAMETERS

2 variables
Spot S
Maturity T

4 parameters
strike K
Annualized volatility
Interest rate r en %
Annualized dividend rate q



II - Let's do it

Let's price a 1 year call struck at 100 with volatility set at 30% interest rate at 5%

a - Open a spreadsheet

b -
- In cells B2 " S", In cells C2 "100"
- In cells B3 "strike K", In cells C3 "100"
- In cells B4 "maturity T", In cells C4 "1"
- In cells B5 "interest rate r", In cells C5 "0.05"
- In cells B6 "dividend rate q", In cells C6 "0"
- In cells B7 "volatility sigma", In cells C7 "30%"



III - FIRST STEEPS

- In cells B9 "d1", In cells C9 "=(ln(C2/C3)+(C5-C6+(0.5*C7*C7))*C4)/(C7*SQRT(C4))"
- In cells B10 "d2", In cells C10 "=C9-C7*SQRT(C4)"



IV - FINALLY

- In cells B14 "Call Value", In cells "=+EXP(-C6*C4)*C2*NORMDIST(C9;0;1;TRUE)-EXP(-C5*C4)*C3*NORMDIST(C10;0;1;TRUE)"
- In cells B16 "Put Value", In cells C16 "=+EXP(-C5*C4)*C3*NORMDIST(-C10;0;1;TRUE)-EXP(-C6*C4)*C2*NORMDIST(-C9;0;1;TRUE)"

It leads to
C14= 14.23125
C16 = 9.354197


Finally


So easy!




Next : Trinomial Model : A First Approach
Previous : Black & Scholes : Vega υ


Related Pdf :

- Understanding N(d1) and N(d2) : Risk-Adjusted Probabilities in the Black-Scholes Model
- Black-Scholes Option Pricing Model


OPTIONS PRICING MODEL - INDEX
OPTIONS PRICING MODEL - INDEX
OPTIONS PRICING MODEL - CHAPTER I
OPTIONS PRICING MODEL - CHAPTER II
OPTIONS PRICING MODEL - CHAPTER III

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