Dow Jones Industrial Average
The Dow Jones Industrial Average (also now as the Dow Jones, the Dow 30 or just the Dow) is a price weighted average of 30 of the most actively traded shares on the New York Stock Exchange and the NASDAQ.
The Dow is calculated using a price-weighted indexing system, rather than the more common market-cap weighted indexing. This means that the constituent companies' influence on the index that is proportional to its price.
The stocks included in the Dow Jones Industrial Average change from time to time and generally represent about 20% of the market value of all shares traded on the NYSE.
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