DislikedAbout zero-sum, FX is a zero-sum game, before arguing about that it's a good idea to read the actual definition of zero-sum and non-zero sum games
http://en.wikipedia.org/wiki/Zero-sumIgnored
"Many economic situations are not zero-sum, since valuable goods and services can be created, destroyed, or badly allocated, and any of these will create a net gain or loss. Assuming the counterparties are acting rationally, any commercial exchange is a non-zero-sum activity, because each party must consider the goods it is receiving as being at least fractionally more valuable than the goods it is delivering. Economic exchanges must benefit both parties enough above the zero-sum such that each party can overcome its transaction costs."