S&P 500 Market Cap and Foreign Holdings of U.S. Equities

Foreign ownership of U.S. equities has risen from the equivalent of 15% of the S&P 500's market capitalization in 2002 to 35% in 2018, peaking at 36.5% in 2015.

Data for S&P 500 at end of Q2 for each indicated year from Standard and Poor. 2019 market cap is $24.42 trillion.