52. The Dow Jones Industrial Average (DJIA) and the Standard & Poor’s 500 (S&P) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks.

Some say the S&P 500 is a better measure of stock market performance because it is broader based. The closing prices for the DJIA and the S&P 500 for 20 weeks, beginning with September 9, 2005, follow (Barron’s, January 30, 2006).