Need help with a formula for Theta

[village idiot]

can any options guru or mathematics guru help with this please;

in the formula for Theta, what does the N' as in N'(d1) mean, and is there an excel function for it?

To be clear, I am asking what N' with an apostrophe stands for as opposed to N , which is NORMDIST in excel

thanks

 

[robusta]

Think I knew a greek girl called Theta, the N stood for no.

 

[mazzatelli]

N' = the std pdf, while N = the std cdf for a normal dist

NORMDIST(x,0,1,FALSE)

 

[village idiot]

thanks mazza, thought you might be able to help.

got it all working good now

cheers