OEX options were the original standard for index options trading on the domestic stock market, though, over time, options on the S&P 500 (SPX) passed them in popularity. OEX® S&P 100TM Index Options. S&P 100 options bring an added dimension to stock market investing by giving you the ability to trade and invest on an entirely different level. S&P 100 Index historial options data by MarketWatch. They are essentially bets on the overall movement of the market or a basket of stocks. Get the basic S&P 100 INDEX (^OEX) option chain and pricing options for different maturity periods from Yahoo Finance.