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Binary Option : Gamma
Issued on July 05 2011 par Strategies-options.com

Binary option Gamma can be expressed with vanillas greeks
We already know that

∆ Binary Call= Г(S/K)
And,
∆ Binary Put= - Г(S/K)

Where
∆ the delta
Г vanilla option gamma
S the spot
K the strike



I - Binary Gamma

As for vanilla options, binary gamma is the first derivative of delta with respect to the spot:
Г Binary Call = ∂ (∆ Binary Call) / ∂S

Г (Binary Call) = ∂ (∆ Binary Call) / ∂S = ∂( Г ( S / K ) ) / ∂S = ( ∂( Г) / ∂S ) . ( S / K ) + Г (∂( S / K ) / ∂S )
Г (Binary Call) = (∂( Г) / ∂S) . ( S / K ) + Г / K
Г (Binary Call) = ( Г / K ) . ( - d1 / ( σ√t ) )
Г (Binary Call) = - ( Г / K ) . ( d1 / ( σ√t ) )

The same way it leads to
Г ( Binary Put ) = ( Г / K ) . ( d1 / ( σ√t ) )



II - Binary Gamma graphs

For a binary call


For a binary put


Both are symmetrical



Next : Binary Option : Theta
Previous : Binary Option : Delta


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Other Derivatives - INDEX
Other Derivatives - CHAPTER I
Other Derivatives - CHAPTER II
Other Derivatives - CHAPTER III
Other Derivatives - CHAPTER IV

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