Re: RFC : Correcting some problems in rounding/number handling

[Hendrik Boom]

> On Fri, Jun 30, 2000 at 01:39:07PM -0500, Bill Gribble wrote:
> > Clark Jones <[EMAIL PROTECTED]> writes:
> > > in stockmarket quotations, e.g., nonsense like "73 213/256".  However,
> > > the SEC has told the U.S. stock markets "thou shalt decimalize", and though
> 
> > Partially true, but stock prices are an important part of gnucash, and
> > while the US stock exchange is going decimal "pretty soon", there are
> > historical prices which will always be in 64ths and the bond market is
> > not likely to decimalize any time soon (according to Jon Trowbridge,
> > who does this stuff for a living; is that a correct interpretation of
> > your mail to me?).
> 
> Yes.  There are also lots of other examples from futures markets,
> which are a wonderful source of pricing perversity.  For example, 10yr
> and 30yr US Govt Bonds trade in 32nds, and 5yr Bonds trade in 64ths.
> Soybeans futures (as well as Corn, Oats and Wheat) are quoted in 1/8th
> of a cent per bushel.

These are all powers of two. Powers of two can all be represented exactly
in decmal.  The converse fails: poers of ten cannot always be exactly
represented in binary.

-- hendrik.

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