The S&P 100 Index is a stock market index of United States stocks maintained by Standard & Poor's.
Index options on the S&P 100 are traded with the ticker symbol "OEX". Because of the popularity of these options, investors often refer to the index by its ticker symbol.
The S&P 100, a subset of the S&P 500, includes 102 (because two of its component companies have 2 classes of stock) leading U.S. stocks with exchange-listed options. Constituents of the S&P 100 are selected for sector balance and represent about 63% of the market capitalization of the S&P 500 and almost 51% of the market capitalization of the U.S. equity markets as of January 2017. The stocks in the S&P 100 tend to be the largest and most established companies in the S&P 500.
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History
The index was started on June 15, 1983.
In 1983, the CBOE created the first index options, based on its own index, the CBOE 100.
In 1993, CBOE created the Chicago Board Options Exchange Market Volatility Index (VIX), which was computed based on the price of S&P 100 options (at the time these were by far the most heavily traded index options). Then in 2003, they changed it to be based on the S&P 500.
Index Symbols List Video
Record values
Components
(as of September 1, 2017)
Statistics
The mean free float market capitalization of the S&P 100 is over 3 times that of the S&P 500 ($135 bn vs $40 bn as of January 2017). So it is larger than a large-cap index. The "sigma" of companies within the S&P 100 is typically less than that of the S&P 500 and thus the corresponding volatility of the S&P 100 is lower. However, the correlation between the two indices is very high.
Investing
This index is tracked by the exchange-traded fund iShares S&P 100 Index (NYSE Arca: OEF). Also, an equal weighted version of the index is tracked by the Guggenheim ETF (NYSE Arca: OEW).
Annual returns
Source of the article : Wikipedia
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