The S&P 500 is a list of fifty hundred U.S. companies. The stock index following the list is one of the most tracked indices in the world.
In the S&P 500 index, the share weights of companies are distributed according to their market values, as the most valuable company on the list (and also in the world) is also the heaviest stock in the index. Microsoft, Amazon.com, and Apple Inc. compete for the top spots on the list.
The Dow Jones Industrial Average tracks the 30 largest U.S.-owned majors. DJIA companies are therefore also part of the S&P 500 index.
MSCI World monitors the equity markets of the developed world. More than 50% of this index is also U.S. firms. Note, however, that although the name of the index refers to the whole world, the index only follows developed markets.
MSCI Emerging Markets
Emerging markets, ie the index following emerging markets. Includes shares of more than a thousand companies from Asia, Latin America, and Africa.
With these indices, geographical dispersion is as easy as… I first wrote haymaking here, but I deleted it because I haven’t even seen haymaking in my life. But you get the point.