What are you comparing it to? US markets have done better than other developed markets over the past few years, but that says nothing about future returns. And if you want to invest internationally, you might want to look for a broader index fund based on the FTSE All World ex US or the MSCI ACWI ex US.
Thank you for your comment. I was more looking at absolute performance over the last 10 y: <1% annual return. I suppose there are a few stretches like that in US stock market history as well. More brightly, the life of EFA returns 6.5% annually over the life. EFA, holding developed country markets outside of north america should be fairly diversified enough, but it is true that if you want to hold newer asian market, those other indexes would fit the bill.
you wrote:
>says nothing about future returns.
I think most people here do look at the long term performance of the S&P to figure such things as if they can go FIRE with a ~4% annual pull in the future.
So what criteria would one instead use to figure which index funds to go into?
Thanks-