S&P 100(OEX) Index is a stock market index made of 100 leading U.S. stocks with exchange-listed options.

S&P 100 Index started in 1983 and is traded on New York Stock Exchange and the NASDAQ Stock Exchange.

^OEX, .OEX, and $ONE are some of the symbols use on different data providers.

S&P 100 Index is owned and maintained by Standard & Poor's, a division of McGraw-Hill.

Index values are useful for investors to track changes in market values over long periods of time.

Technical analysis uses index charts to identify changes in trends whether short-term, mid-term or long-term time frames.