Considering the demonstrable 6%-8% EU Equity advantage over US Equities AND factoring in the 5%-8% advantage of Asian Equities (including Japan) over EU Equities...
... and foregoing the somewhat intricate math (which couldn't type in here)...
Asian Equities have a demonstrable 10%-12% Annual Return Advantage over the US!!
This does Not mean that Asian Equities are "guaranteed to go up" but rather that in any event, they are a better investment, for better or for worse, than their US counterparts - considering all available factors, including the FX differential.
E.g. Long Japan/S. Korea / Short US is the obvious, correct spread. (...because no one should trust those Commie Chinese bastards! - Right?!)