The ticker for the PowerShares QQQ Trust, Series 1, an ETF traded on the Nasdaq Index. Formerly the Nasdaq-100 Trust, Series 1, this trust holds all the component securities that make up the Nasdaq and issues securities called QQQ Index Tracking Stock that are designed to track the approximate performance of the Nasdaq Index.
NASDAQ 100 Index
A stock index of the 100 largest companies by market capitalization traded on NASDAQ. The NASDAQ 100 Index includes publicly-traded companies from most sectors in the global economy, the major exception being financial services. Various exchange-traded funds follow the NASDAQ 100 Index. Its symbol on the NASDAQ ticker is QQQ. It is informally called the Cubes.