ProShares UltraShort QQQ (QID) Stock Price, Quote, News & History

The Fund invests in financial instruments that ProShare Advisors believes, in combination, should produce daily returns consistent with the Daily Target. The Index is designed to measure the performance of 100 of the largest Nasdaq-listed non-financial companies. The Index includes non-financial companies listed on the Nasdaq Global Select Market or the Nasdaq Global Market (which include both U.S. and non-U.S. companies). The top 100 companies based on market capitalization are included in the Index. These companies are then weighted based on market capitalization. The Indexs composition and the assigned weights are reevaluated every December, with additional weight adjustments occurring in March, June, and September.