Less is more, 30 best companies
Dow Jones Index is the best-known icon of US stock market. It use quantitative screening and qualitative analysis to select 30 best U.S. blue-chip companies.
All the top companies are included in Dow Jones Index
Most of the companies be included in Dow Jones Index are large multinational enterprises. Their oversea revenues account for nearly half of their total revenues. In other words, these companies dominate not only US markets, but also all over the world.