The Dow Jones Industrial Average is an index created by Charles Dow, founder of the Dow Jones & Co., and Edward Jones in 1896. It is an index showing how 30 of the largest companies are performing. Each company is a component of the index. The average is price-weighted and is adjusted to consider stock splits and dividends. The public at large still follows the Dow Jones Average closely, although many professionally prefer the S&P 500, as it has a more diverse subsection of the economy. General Electric Company (NYSE/GE) has had the longest tenure as a component of the Dow Jones Average, as it was added in 1907.