Black Model

The Black model (sometimes known as the Black-76 model) is a variant (and more general form) of the Black-Scholes option pricing model. It is widely used in the futures market and interest rate market for pricing options. It was first presented in a paper written by Fischer Black in 1976.

The Black formula

The Black formula for a call option on an underlying struck at K, expiring T years in the future is
c = e^{-rT}(FN(d_1) - KN(d_2))
where
r is the risk-free interest rate
F is the current forward price of the underlying for the option maturity
d_1 = \frac{log(\frac{F}{K}) + \frac{\sigma^2t}{2}}{\sigma\sqrt t}
d_2 = d_1 - \sigma\sqrt t
\sigma is the volatility of the forward price.
and N(.) is the standard cumulative Normal distribution function.
The put price is
p = e^{-rT}(KN(-d_2) - FN(-d_1)).

Derivation and assumptions

The derivation of the pricing formulas in the model follows that of the Black-Scholes model almost exactly. The assumption that the spot price follows a log-normal process is replaced by the assumption that the forward price follows such a process. From there the derivation is identical and so the final formula is the same except that the spot price is replaced by the forward - the forward price represents the expected future value discounted at the risk free rate.

See also

External links

References

  • Black, Fischer (1976). The pricing of commodity contracts, Journal of Financial Economics, 3, 167-179.
  • Garman, Mark B. and Steven W. Kohlhagen (1983). Foreign currency option values, Journal of International Money and Finance, 2, 231-237.

 

<< PreviousWord BrowserNext >>
british american racing
battle of freeman's farm
delusional parasitosis
belcea quartet
carbonated water
united pentecostal church
cobham
battle of maserfield
stress strain curve
taunton stop line
james maxton
skanderbeg
chesham
list of political parties in the united kingdom
kaiser wilhelm institute of anthropology, human heredity, and eugenics
instrument landing system
the awkward squad
siege of taunton
taunton (disambiguation)
strays
james inglis hamilton
james inglis (anderson) hamilton
play (band)
option style
taunton
jrgen mllemann
willy ritschard
jason newsted
saratoga campaign
play (drum'n'bass album)
grazing antelope
sea cucumber
oswestry
aegukga
ruth metzler arnold
popular democratic party
old oswestry
guan yu
xiahou dun
josef escher
marginal sea
community of practice
josef anton schobinger
parental supervision