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Subject: Comment about PV
In OpenDocument-v1.2-cd05-part2, 6.12.42 PV, the formula seems to have PV and FV with different signs. For example, if Rate == Payment == 0, then: PV = - FV, or if the Future value is $1000 then Present value is -$1000. This seems odd to say the least. Also the semantics of a payment should be made more clear, that is that a payment is out of the investment. As in, say I want to put $100 dollars in an investment, then payment would be -100, not 100, so that if I was adding 5 payments: PV = -(Payment*Nper) = -(-100*5) = 500 (as opposed to -500). Personally I think it would make more sense to invert the sign of payments as well as future value, but that is my preference, and I think I have seen the other way of payments used more often. Josh Cogliati
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