re: How much should I invest in international mutual funds in my 401k?

International is frustrating. If you avoid it altogether, you’re missing out on the only company in the world that makes the machines that make high-end chips (ASML), the two largest chip manufacturers in the world (TSMC and Samsung) and the only large-bodied airline manufacturer that isn’t Boeing (Airbus). Unfortunately financials are a decent size of most international indexes and you can argue that you get enough international economic sensitivity from US stocks already.

That being said, I just rebelanced my 401k to 10% in an international index. It’s enough to matter but not enough to highly skew my performance.