Quote:
Originally Posted by BartimaeusOfUruk
I'm unable to find the variance of a monthly annuity given adouble dot, the second moment of adouble dot, and the interest rate. Could you elaborate on the formula you are mentioning please? Thanks so much.

I meant the formula for the variance in terms of Ax and doubleforce Ax and the discount rate d. Just replace each by its mthly version.
When you say you are given "the second moment of adouble dot", do you really mean the second moment? I suspect that you mean that you are given doubleforce adouble dot, which is quite different, from which you can easily get doubleforce A. And are you given these for annual annuities or mthly annuities? I need to know exactly what you're given. Perhaps you could state the problem precisely.