You don't have much space left in 64 bits for some financial numbers. FX swap trades with a billion dollars on one side and some very devalued currency on the o

You don't have much space left in 64 bits for some financial numbers. FX swap trades with a billion dollars on one side and some very devalued currency on the other (e.g. zimbabwe dollars 1:60,000,000 at one point). It gets worse when you start adding those numbers up.