How is Stock Market Performance is Measured

Over 9000 companies listed on the 3 main US stock exchange:

1. New Stock Stock Exchange
2. NASDAQ
3. American stock exchange

US stock is represent by many indexes, the most popular:

1. Standard & Poor 500 index (S&P 500)

• 500 largest companies in US stock market
• Represent 70% of total stock market value
• Calculate by taking the weighted average price of all 500 stocks

1. Dow Jone Industrial Index (DJI)

• Consist 30 of largest companies in US