QQQ - Investment & Finance Definition
The trading symbol for the NASDAQ 100 Index tracking stock that is traded on the American Stock Exchange. It is pronounced cubes but is often spelled qubes. An exchange-traded fund (ETF), QQQ allows investors to purchase or sell an investment vehicle that mimics the movement of the underlying price index. The NASDAQ 100 tracks 100 of the top non-financial services companies listed on the NASDAQ Stock Market.