The ProShares UltraPro QQQ (TQQQ) is an exchange-traded fund (ETF) that seeks daily investment results, three times (3x) the performance of the Nasdaq-100 Index. The fund is managed by ProShare Advisors LLC and was launched in 2006.

The Nasdaq-100 Index is a market-capitalization-weighted index that measures the performance of the 100 largest non-financial companies listed on the Nasdaq Stock Market. The index is a popular benchmark for many investors.

TQQQ is a leveraged ETF, which means that it uses derivatives to magnify its exposure to the underlying index. This can lead to significantly higher returns, but also to significantly higher risk.