Originally Posted by big-papa
It begins to get a little complex when so many US companies have significant foreign operations already. Additionally, some indices already have some non-US stock holdings.
That's why I don't worry about having "only" 20% of equities in foreign companies. What I have is enough that I usually rebalance between the two each year - i.e. there is enough difference in performance that one is trimmed to add to the other and which outperforms switches most years.