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XNpv(rate, values, dates, I)

Computes the net present value (NPV) of a non-periodic cash flow with constant discount rate. The «rate» parameter is the annual discount rate for a 365 day year. The «values» parameter is indexed by «I» and contains the cash flow amounts, with positive values indicating inflows (payments received) and negative values indicating outflows (payments made). The «dates» parameter must also be indexed by «I» and contains the date in which each payment is made. The date is expressed as the number of days since the date origin (e.g., Jan 4, 1904).

For periodic cash flows, the Npv function can be used without having to specify the actual dates of each payment. The page on Npv discusses the concept of net present value in some detail.

See Also


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