The Dow Jones Industrial Average (nickname: The Dow) is one of the most famous and the oldest index in the capital market.

This index consists of 30 biggest companies in the American capital market.

The weight of each of the companies in the index matches up with the stock price.

The editors of “The Wall Street Journal” select the companies to be included in the index and also they decide on when and how they have to modify the composition of the index.

Nearly, 20 changes have been done to the index until date.

General Motors is the only company which has continued to be in the index from the time the company was founded in 1896.