The S&P 500 index (^SPX) is a set of 500 stocks of Large-Cap U.S. public corporations. These companies represent different industries in the U.S. economy.
Below you may see the list of the companies from the S&P 500 basket. The companies that are included in the index are selected by committee on the regular basis and this list could be outdated. For more recent list, please to the Standard & Poor's website.
Naked options trading is very risky - many people lose money trading them. It is recommended contacting your broker or investment professional to find out about trading risk and margin requirements before getting involved into trading uncovered options.