S&P 100 trading

S&P 100 Index Fundamentals

Known by its ticker symbol OEX, the S&P 100 is a subset of the S&P 500 and tracks the largest, most liquid stocks which have options contracts traded on them. The Standard & Poor's 100 Stock Index, measures large company U.S. stock market performance.

The S&P 100 is not just a list of the largest 100 companies. It is an index of 100 of the most widely held U.S.-based common stocks, chosen by the S&P Index Committee for market size, liquidity, and sector representation. According to the Index Committee, "Leading companies in leading industries" is the guiding principal for S&P 100 inclusion. While widely traded international companies are included, the Index Committee recently announced that only U.S.-based companies will be added in the future.

The S&P 100, a subset of the S&P 500, is comprised of 100 leading U.S. stocks with exchange-listed options. Constituents of the S&P 100 are selected for sector balance and represent about 57% of the market capitalization of the S&P 500 and almost 45% of the market capitalization of the U.S. equity markets. The stocks in the S&P 100 are generally among the largest and most established companies in the S&P 500. In past years, turnover among stocks in the S&P 100 has been even lower than the turnover in the S&P 500.

S&P 100 Index Capitalization

This market capitalization-weighted index is made up of 100 major, blue chip stocks across diverse industry groups. OEX is the ticker symbol of the S&P 100, on which OEX options are traded very heavily.

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