Russell 1000 Index
The Russell 1000 Index is a stock market index that represents the highest-ranking 1,000 stocks in the Russell 3000 Index, which represents about 90% of the total market capitalization of that index. The Russell 1000 Index has a weighted average market capitalization of $81 billion; the median market capitalization is approximately $4.6 billion. The smallest company in the index has a market capitalization of $1.8 billion.
The ticker symbol is ^RUI.
The Russell 1000 Index is tracked by several exchange-traded funds, such as the iShares Russell 1000 Index (NYSE Arca: IWB) and the Vanguard Russell 1000 Index ETF (NASDAQ: VONE). There are also iShares Russell 1000 Growth Index (NYSE Arca: IWF) and iShares Russell 1000 Value Index (NYSE Arca: IWD).
Top 10 holdings
- Apple Inc (NASDAQ: AAPL)
- Microsoft Corp (NASDAQ: MSFT)
- Exxon Mobil Corp (NYSE: XOM)
- Johnson & Johnson (NYSE: JNJ)
- General Electric (NYSE: GE)
- Wells Fargo (NYSE: WFC)
- Berkshire Hathaway Inc (NYSE: BRKB)
- JPMorgan Chase & Co (NYSE: JPM)
- Pfizer Inc (NYSE: PFE)
- Procter & Gamble Company (NYSE: PG)
(as of May 31, 2015) 
Top sectors by weight
- Financial Services
- Health Care
- Consumer Discretionary