Commissions do not affect our editors' opinions or evaluations. The DJIA is a stock index that tracks the share prices of 30 of the largest U.S. companies. Like the S&P 500, the DJIA is often used ...
How to Invest in the Dow Jones Industrial Average The DJIA is an index, meaning investors can’t take a direct stake in it. Even so, they might consider buying stakes in companies listed on it.