Mutual fund prices precision

[AC]

The accounts are all set to six decimals right now but the displayed
number of decimals is only 3 in places like the balance.  If there's
some very subtle rounding errors or truncation errors I'm not able to
see them.

On 2015-08-01 19:14, David T. wrote:
> AC, 
> 
> My experience doesn’t match yours; if I fill out the shares and purchase price, the price is set by GnuCash, and the shares stay accurate—as others have described.
> 
> Is it possible that your account is set to 2 decimal places? That would explain the rounding you describe.
> 
> David
> 
>> On Aug 1, 2015, at 8:08 PM, AC <gnucash at acarver.net> wrote:
>>
>> On 2015-08-01 16:37, farleykj wrote:
>>> I tried this out, via the following, pretty much as you described:
>>> (1) enter 47.889 shares in that column.
>>> (2) enter 4.76 in the price column
>>> Make no other entries, <tab> through to the next line of the split.
>>> The result is the total is calculated as 227.95. This results in the price
>>> per share being adjusted to the 4.75997 value. The number of shares is
>>> unchanged. Thus I don't understand what you mean by the final share count
>>> being off.
>>> I suspect what's happening is because the registers are only allowing the
>>> balance column to represent numbers with two decimal places, since we're
>>> dealing with dollars and cents. It calculates the total to be 47.889 * 4.76
>>> = 227.95164, rounds that to 227.95, then recalculates the price to be
>>> 4.75997.
>>
>> Somewhere it's causing the shares or the balance of the account to be
>> off slightly.  My balances are showing three decimal places currently
>> and I've even set the accounts to have six decimal places with no
>> apparent change.  This account is off by about one whole point whereas
>> the other fund accounts differ from the statement by 0.01 or so.  The
>> others have fewer transactions than this one so it seems to be a
>> cumulative effect.  The balance column doesn't line up with any of the
>> statements over time, it's slowly drifting apart.
>>
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>