Calculating the product of row data on a single field

Similar to the computing the sum of data across row data on a particular

field, is it possible to calculate the product of row data on a single

field? What I'd like to do is construct a financial calculation in which I

have return data on an account by month

ie

Sept 2%

Oct 4%

Nov 2%

To find out the total return for the period, the calculation would be:

[(1+Sept return) * (1+ October return) * (1+ Nov return)]

Any thoughts...

Thanks

tp