Hi,

Does anybody know why XNPV appears not to accept negative rates?

e.g. using the example in the Excel 2003 help: (i.e. amounts = -10000,
2750, 4250, 3250, 2750, dates = 01 Jan 2008, 01 Mar 2008, 30 Oct 2008,
15 Feb 2009, 01 Apr 2009) returns #NUM! for rates 0 or below. That is
=XNPV(0,amounts, dates). However when I composed a VBA function to
duplicate the formula for XNPV, as shown in the help, the value is 3000
when the rate is zero.

thanks,
L.