PowerShares QQQ Trust, Series 1 is an exchange traded fund launched and managed by Invesco PowerShares Capital Management LLC. The fund invests in the public equity markets of the United States. It invests in stocks of companies operating across diversified sectors. The fund invests in stocks of large-cap companies. It seeks to replicate the performance of NASDAQ-100 Index, by investing in stocks as per their weightings in the index. The fund was formerly known as Nasdaq-100 Trust, Series 1. PowerShares QQQ Trust, Series 1 was formed on March 10, 1999 and is domiciled in the United States.