Recently, I heard on a podcast that if we cut off the performance comparison between international stocks and the US to before 2010, you will observe that their performance are rather identical. I sort of think international stocks should have done well in the past to warrant certain dual momentum strategies to always compare the past 6 to 12-month momentum difference between the USA market and international market but like many, it surprised me that they are on par. Perhaps that is what recency bias does to us. This post was originally posted here. The writer is a veteran community member and blogger on InvestingNote, with a username known as @Kyith. Here is the annualized return if you invested in the S&P 500, MSCI USA and MSCI World ex USA from 1970 to Dec 2009: Index Annualized Return  It looks really close. Do note that MSCI World does not include emerging market stocks....