Strategies Options        "To manage is To Forecast..."
 The Option Trading Website
Accès Site
 
Home  >  Pricing Models  >  Black & Scholes : Delta ∆ 

Black & Scholes : Delta ∆
Issued on July 14 2011 par Strategies-options.com

Option Delta ∆ is the first derivative of an option price with respect to the spot in the Black & Scholes model.
Delta ∆ is defined in the Black & Scholes model as the first derivative of an Option Price with respect to Spot.

Then, if we set,

t the starting date
S the spot
K the strike
r continuously compounded annualized interest rate
q continuously compounded annualized dividend rate
T the maturity
σ the annualized volatility

If we claim that a price P for an option is a function of t, S, K, r, q, T, σ
Then we can write P = P(t, S, K, r, q, T, σ)

And,

Δ = ∂ P / ∂ S





I - For the europrean style call


Δ = ∂ C / ∂ S
Δ = ∂ [exp ( - q.τ ) . S . N( d1 ) - exp ( - r.τ ) . K . N( d2 ) ] / ∂ S
Δ = exp ( - q.τ ) . N( d1 )





II - For the european style put


Δ = ∂ P / ∂ S
Δ = ∂ [ - exp ( - q.τ ) . S . N( - d1 ) + exp ( - r.τ ) . K . N( - d2 ) ] / ∂ S
Δ = - exp ( - q.τ ) . N( - d1 )
Δ = - exp ( - q.τ ) . [ - N( d1 ) + 1 ]
Δ = exp ( - q.τ ) . N( d1 ) - exp ( - q.τ )




Next : Black & Scholes : Gamma Г
Previous: Black & Scholes: The Greeks


Pdf connexes :

- 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

Strategies-options.com
Other articles
- Other Derivatives -
Binary Option : theta
Time decay for binary options is less important than for vanillas ones.
- Relationships Between Option Sensitivities -
At The Money Forward Relationships 4
Time, volatility and ATMF option value
- Pricing Models -
Black & Scholes: the greeks
For a much more accurate management of options portfolio, it's sometimes needed to take a look at some sensibilities : that's greeks !
- Other Derivatives -
Other Derivatives - CHAPTER III
Stability Warrants
- Currency Options Trading Strategies -
Forex Options Strategy - EUR / USD - OTM Butterfly Spread DEC11 ( 3rd Update)
Our Butterfly spread on EUR/USD options, with Dec, 28th expiry, enhances its value due to spot move.
- Advisory -
Special Options Situations
Vous êtes confronté ponctuellement à une situation complexe de gestion, de pricing, de risk management et vous souhaitez profiter de l'expérience d'un professionnel: gagnez du temps et donc de l'argent.