Dow Jones
Overview
Created in 1896, the Dow Jones Industrial Average is one of the world’s oldest and most widely recognized stock indexes—a measure tracking the stock performance of a selected group of companies.
Originally designed to track America’s leading industrial firms, the Dow has evolved into a cultural and financial shorthand for the health of the US economy. As of 2025, it measures 30 major companies (called components) across sectors such as technology, healthcare, finance, and consumer goods.
Unlike most modern indices, which are weighted by the total value of a company’s shares, the DJIA uses a price-weighted formula—meaning stocks with higher share prices exert more influence, regardless of company size. The DJIA has been updated 59 times since its creation to reflect changes in the US economy. Companies can be removed if they decline in relevance, merge or are acquired, or no longer represent the sectors the index aims to capture.
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The United States is home to more than 33 million businesses, the vast majority of which are small businesses, with millions being created (and others closing shop) every year. These businesses often rely on loans, provide the goods and services that keep the economy flowing, and sometimes even grow large enough to enter public markets or provide private investment opportunities. Explore key topics central to business and finance, from the role of the Federal Reserve to how initial public offerings work, how millions of American students finance higher education, and more.
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