What is the Dow Jones Industrial Average Stock Index?The Dow Jones Industrial Average (DJINDICES:^DJI) is a stock index that tracks 30 of the largest U.S. companies. Created in 1896, it is one of the oldest stock indexes, and its performance is widely considered to be a useful indicator of the health of the entire U.S. stock market. The Dow Jones Industrial Average index is managed by S&P Dow Jones Indices, a joint venture majority-controlled by the financial information and analytics company...