Currently, the Dow Jones Industrial Average is computed by $$

adding the prices of $30$ large "blue$-$chip" stocks and dividing by a divisor adjusted for stock splits and large stock dividends

calculating the total market value of the $30$ firms in the index and dividing by $30$

measuring the current total market value of the $30$ stocks in the index relative to the total value on the previous day

adding the prices of $30$ large "blue$-$chip" stocks and dividing by $30$