iShares S&P 100 Index Fund is an exchange-traded fund of US stocks. The fund tracks the S&P 100 index. Its ticker is OEF. Holdings Top ten holdings: Apple Inc. (AAPL) Exxon Mobil Corp. (XOM) International Business Machines (IBM) AT&T Inc. (T) Microsoft Corp. (MSFT) Citigroup Inc. (C) Chevron Corp. (CVX) Johnson & Johnson (JNJ) Coca-Cola Co. (KO) Pfizer Inc. (PFE) (as of June 2012) Competitors iShares S&P 100 mainly competes with S&P 500 funds, including SPDR S&P 500 (), iShares Core S&P 500 (), and Vanguard S&P 500 ETF (). Those funds are not mega; one fund that is more similar is Guggenheim Russell Top 50 Mega Cap (). See also iShares S&P Global 100 References External links iShares S&P 100 ETF MarketWatch page for OEF Exchange-traded funds S&P Dow Jones Indices