On 6/29/2014 11:13 AM, Russel Winder via Digitalmars-d wrote:
On Sun, 2014-06-29 at 07:59 -0700, Andrei Alexandrescu via Digitalmars-d
wrote:
[…]
A friend who works at a hedge fund (after making the rounds to the NYC
large financial companies) told me that's a myth. Any nontrivial
calculation involving money (interest, fixed income, derivatives, ...)
needs floating point. He never needed more than double.
Very definitely so. Fixed point or integer arithmetic for simple
"household" finance fair enough, but for "finance house" calculations
you generally need 22+ significant denary digits to meet with compliance
requirements.
Doubles are only good to 17 digits, and even that 17th digit is flaky.
