Dividends and FX options

When a stock pays a continuous dividend at a rate of $ \delta $, or if one considers FX options where the foreign interest rate is $ r^{f}$ [which is equivalent to a dividend payment], the Greeks can be computed easily following the same steps. The same is also true for European put options. We now summarize the results in the following tables:

Non dividend paying stock

$\displaystyle \begin{tabular}{l\vert ll}
& \textbf{Calls} & \textbf{Puts}  \h...
...) $ & $-KTe^{-rT}%%
\mathcal{N}\left( -d_{2}\right) $  \hline
\end{tabular}$

Dividend paying stock [index]

$\displaystyle \begin{tabular}{l\vert ll}
& \textbf{Calls} & \textbf{Puts}  \h...
...) $ & $-KTe^{-rT}%%
\mathcal{N}\left( -d_{2}\right) $  \hline
\end{tabular}$

FX
All formulas are the same as the ones for the dividend paying stocks, where $ \delta $ is replaced by $ r^{f}$. There is an extra rho calculated with respect to the foreign interest rate, given by

$\displaystyle \begin{tabular}{l\vert ll}
& \textbf{Calls} & \textbf{Puts}  \h...
... & $%%
STe^{-r^{f}T}\mathcal{N}\left( -d_{1}\right) $  \hline
\end{tabular}$

Kyriakos 2003-03-17