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http://www.openoffice.org/issues/show_bug.cgi?id=93534
Issue #|93534
Summary|PRICEDISC et al.: Basis 0 NASD implementation
Component|Spreadsheet
Version|OOo 2.4.1
Platform|All
URL|
OS/Version|All
Status|UNCONFIRMED
Status whiteboard|
Keywords|
Resolution|
Issue type|DEFECT
Priority|P3
Subcomponent|programming
Assigned to|spreadsheet
Reported by|drking
------- Additional comments from [EMAIL PROTECTED] Sat Sep 6 06:30:17 +0000
2008 -------
A number of functions, including PRICEDISC use GetDiffDate() to calculate the
result.
GetDiffDate() doesn't implement basis 0 (NASD) correctly - it makes no attempt
to change month end dates.
Example:
PRICEDISC("2009-07-31";"2009-08-5";2%;100;0) returns
99.977777777778 based on 30+5-31 = 4 days difference in dates (!)
Excel correctly returns
99.972222222222 (5 days difference in dates)
(note that the inverse function YIELDDISC uses a difference routine (!) -
YEARFRAC - I have not investigated that yet)
Reference: NASD implementation was also the subject of issue 84934 - for
DAYS360.
PS: GetDiffDate() also gives the days in the *first year* - this is often not
what is required, and is different from Excel. I'm not yet sure how this should
be specified.
I guess there are ODFF implications here?
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