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Binomial Model : the tree
Issued on October 03 2010 par Strategies-options.com

Binomial model can be drawn as a tree to get some insight.
I - Basic Relation

The most important point is to grasp that an option value can be derived if one knows two possible closing prices with attached risk neutral probabilities.


One needs to "present value" the result (cf Actualisation : Un Principe Fondamental ).

One needs to divide T into « n » small periods « ∆t » with ∆t= T ∕n and:
u is an up factor u=exp(σ√∆t)
d is a down factor d= exp(-σ√∆t)
p is the « risk-neutral » up probability p=((exp(b∆t)-d) / (u-d) (exp(.) euler function)







II - A global formula

It leads for a call and a put to,




Next : Binomial Model: How To Price With A Tree !
Previous : Binomial Model: Let's Price With It ! ( The Revenge 2)


Related Pdf :

- BINOMIAL 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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