Calculate vanilla option prices or sensitivities using finite difference method

`[`

calculates
vanilla option prices or sensitivities using the finite difference
method. `PriceSens`

,`PriceGrid`

,`AssetPrices`

,`Times`

]
= optstocksensbyfd(`RateSpec`

,`StockSpec`

,`OptSpec`

,`Strike`

,`Settle`

,`ExerciseDates`

)

`[`

adds optional name-value pair arguments. `PriceSens`

,`PriceGrid`

,`AssetPrices`

,`Times`

]
= optstocksensbyfd(___,`Name,Value`

)

[1] Haug, E. G., J. Haug, and A. Lewis. *"Back to basics:
a new approach to the discrete dividend problem."* Vol.
9, Wilmott magazine, 2003, pp. 37–47.

[2] Wu, L. and Y. K. Kwok. "A front-fixing finite difference method
for the valuation of American options." *Journal of Financial
Engineering.* Vol. 6.4, 1997, pp. 83–97.