ProShares UltraShort QQQ (the Fund), formerly UltraShort QQQ ProShares, seeks daily investment results that correspond to twice (200%) the inverse (opposite) of the daily performance of the NASDAQ-100 Index (the Index). The Index includes 100 of the largest non-financial domestic and international issues listed on the NASDAQ Stock Market. To be eligible for inclusion companies cannot be in bankruptcy proceedings and must meet certain additional criteria, including minimum trading volume and seasoning requirements. The Index is calculated under a modified capitalization-weighted methodology. The Fund takes positions in securities and/or financial instruments that, in combination, should have similar daily return characteristics as –200% of the daily return of the index. The Index is a price return index. The Fund’s investment advisor is ProShare Advisors LLC.