Price options using Black-Scholes option pricing model

returns option prices using the Black-Scholes option pricing model.`Price`

= optstockbybls(`RateSpec`

,`StockSpec`

,`Settle`

,`Maturity`

,`OptSpec`

,`Strike`

)

When using `StockSpec`

with `optstockbybls`

, you
can modify `StockSpec`

to handle other types of underliers when
pricing instruments that use the Black-Scholes model.

When pricing Futures (Black model), enter the following in
`StockSpec`

:

```
DivType = 'Continuous';
DivAmount = RateSpec.Rates;
```

When pricing Foreign Currencies (Garman-Kohlhagen model), enter the following in
`StockSpec`

:

```
DivType = 'Continuous';
DivAmount = ForeignRate;
```

where `ForeignRate`

is the continuously compounded, annualized
risk free interest rate in the foreign country. For example, see Compute Option Prices on Foreign Currencies Using the Garman-Kohlhagen Option Pricing Model.