DJIA vs S&P500

DJIA:
1. 30 North American stocks picked by the Wall Street Journal.
2. Calculated through a method of simple mathematical averages.
3. Higher-priced stocks affect the average more than lower-priced ones.

S&P 500:
1. 500 North American stocks picked by an S&P board.
2. Calculated by giving weights to each stock according to their market value.
3. Regardless of stock price, a percentage change will be reflected the same on the index.