Re: [Boost-users] RE: Boost thread problem

From: remi.chateauneu_at_[hidden]
Date: 2005-04-17 11:28:58

Ben Hutchings wrote:

> If you're dealing with other people's money then there are regulations 
> that specify the required intermediate precision and rounding rules, 
> which may vary from place to place.

For market risk, the amounts are very high and somewhat 'virtual', 
because what is evaluated is a probability of gain/loss, and therefore 
some imprecision is acceptable.
When it is about 'real' money, imprecision is unavoidable (...change 
rates...), but what helps is the small number of operations (couple of 
additions / multiplications) in each separate transaction. When other 
types of financial operations implies many numbers, regulations may 
enforce to have specific accounts storing rounding errors (differences 
between the actual and expected results): Although there are rounding 
errors, nothing 'disappeared' from the bank's books.