I don't currently hold any exclusively ex-us funds. I happen to work at a fortune 500 and notice that it's revenue is about 60/40 Us vs the rest of the world. Internet sources seem to vary, but probably somewhere between 20 to 45 percent of sp500 revenue comes from outside the US.
With this in mind is the point of holding ex-us funds just another diversification source to hedge against non-us companies outperforming us based ones both in the us and abroad?