The S&P 500 Index is widely regarded as the leading benchmark of the overall U.S. stock market. Comprised of 500 leading companies, the index is considered the best single gauge of large cap U.S. equities.
CBOE is the exclusive home for S&P 500 Index options (SPXSM). CBOE's suite of S&P 500 products includes the flagship SPX contract -- the most-actively traded index option in the U.S. -- along with contracts featuring different expirations (weekly and end-of-month), exercises (AM and PM), sizes (regular and mini) and trading methods (electronic and open outcry).
Beginning on Monday, March 9, 2015, the trading hours for options on the SPX and SPXW (SPX Weeklys and SPX End-of-Month) begin at 2:00 a.m. Central time (Chicago time). Please visit the Extended Trading Hours webpage for more details.
CBOE's SPX products provide investors different ways to efficiently gain exposure to the U.S. market and execute risk management, hedging, asset allocation and income generation strategies.