Mutual fund prices precision

Maf. King maf at chilwell.net
Tue Aug 4 03:18:18 EDT 2015


On Tue 4 August 15 08:01:48 Colin Law wrote:
> On 3 August 2015 at 22:31, AC <gnucash at acarver.net> wrote:
> >> ..
> > 
> > As an example, a purchase of 136.742 shares (same precision as the
> > statement) for a total price of $650.89 (also same precision) and the
> > price per share is 4.759 on the statement and 4.75999 in GC.  The
> > statement lists prices per share to three decimals.  There is probably
> > internal rounding on their system that I can not see because no
> > statement or other record shows more than three decimals of price.
> 
> Interestingly neither your bank nor GC seem to have correctly rounded
> it, both have truncated.  If you get your calculator out and work out
> 650.89/136.742 you will see the answer is 4.7599895959 (to that
> precision).  So to three decimal places the correct rounded figure is
> 4.760 and to five decimal places it is 4.76000.
> 

Colin,
surely the 5dp rounding should be 4.75999?

Maf.


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