Dow Jones tracks 30 large U.S. companies, providing a snapshot of market health. Investors can't buy Dow stock but can invest via ETFs or shares of Dow companies. The Dow is price-weighted ...

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 ...