Dow Jones Industrial Average Historical logarithmic graph of the DJIA from 1896 to 2011 Foundation February 16, 1885; 136 years ago (1885-02-16) (as DJA)[1] May 26, 1896 (1896-05-26) (as DJIA)[2] Operator S&P Dow Jones Indices Exchanges New York Stock Exchange NASDAQ Trading symbol ^DJI $INDU .DJI DJIA Constituents 30 Type Large cap Market cap US$10.84 trillion (as of July 30, 2021)[3] Weighting method Price-weighted index Website us.spindices.com/indices/equity/dow-jones-industrial-average