ARTICLE SYNOPSIS ...Daytrading QQQ by Misha T. Sarkovich, Ph.D. Looking at price history can help you become a more successful trader. The QQQ is an exchange-traded fund (ETF), sometimes referred to as "cubes" or "Qs." The QQQ is traded primarily on the exchange floor of the American Stock Exchange (AMEX) and represents a price index of Nasdaq 100's largest stocks. In essence, the QQQ allows investors and traders to buy or sell shares in the collective stock performance of an entire stock portfolio as a single security. Other common exchange-traded funds are SPY and DIA, which are also referred to as "spiders" ...