|
Binary Options : Vega
Issued on August 24 2011 par Calendarspread
Binary Options are sensible to implied volatility as every option. It leads to the notion of vega.
I - Binary Option Vega
As for the majority of greeks, the vega is calculated as a derivative of an option price.
This time, with respect to implied volatility.
ν = ∂ Binary / ∂ σ
For a binary call :
ν ( binary call ) = ∂ exp(-rτ) . N(d2) / ∂ σ
ν ( binary call ) = - exp(-rτ) . N’(d2) . d1/σ
For a binary put :
ν ( binary put ) = ∂ exp(-rτ) .(1- N(d2)) / ∂ σ
ν ( binary put ) = exp(-rτ) . N’(d2) . d1/σ
II - Relation between Binary Options Vegas
ν ( binary call ) + ν ( binary put ) = - exp(-rτ) . N’(d2) . d1/σ + exp(-rτ) . N’(d2) . d1/σ = 0
III - Graphs
For a binary call 100:
For a binary put 100 :
Previous : Binary Option : Theta
Other Derivatives - INDEX
Other Derivatives - CHAPTER I
Other Derivatives - CHAPTER II
Other Derivatives - CHAPTER III
Other Derivatives - CHAPTER IV Calendarspread
|
|