Factbox: Nasdaq's 'Cubes' ETF reaps Nasdaq's big run

The QQQ exchange-traded fund, often called the "Cubes" or the "Qs," tracks the Nasdaq 100, the index of the biggest 100 non-financial companies listed on the Nasdaq and is a proxy for the much broader Nasdaq Composite Index. * Since its 1999 launch with fewer than $15 million in assets, the QQQ has grown 2,645-fold in assets, making it larger now than the entire U.S. ETF industry was then. * The fund started as a side project for a handful of Nasdaq employees seeking to bring mom-and-pop investo