Originally Posted by
mduell
The neutral unit of construction (or currency) is a private currency where the exchange rates are only updated (by IATA) once a month. It's always equal to a dollar, but it may diverge from the dollar exchange rates of other currencies over the course of the month.
Oh, wait, I get it. So the actual effect is to allow them to publish a price of €999 without having to worry that it will be displayed as €997 tomorrow and €1004 on Friday due to changes in EURUSD.
You could accomplish the same thing by allowing the fare itself to include a currency code, but that would presumably take a multi-billion-dollar retrofit.
Thanks!