#stock_index__stockindex__stock_market_index  index based on a statistical compilation of the share prices of a number of representative stocks
  supertype:  index_number__indexnumber__index__indicant__indicator  a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
  subtype:  Dow_Jones__Dow-Jones_Industrial_Average  an indicator of stock market prices; based on the share values of 30 leading companies listed on the New York Stock Exchange
  subtype:  Standard_and_Poor's_Index__Standard_and_Poor's  a broadly based stock market index

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