KEY TAKEAWAYS The ProShares UltraPro Short QQQ (SQQQ) is a 3x leveraged inverse ETF that tracks the Nasdaq 100. It seeks to return the exact results of the Nasdaq 100 index times negative three. This ETF follows the Nasdaq 100, which is heavily weighted toward technology and telecommunications stocks. The SQQQ is meant to be held intraday and is not a long-term investment, where expenses and decay will quickly eat into returns. It is not appropriate to be a long-term holding, even among bearish investors. Established in February 2010 by ProShares, $Nasdaq100 Bear 3X ETF(SQQQ)$ is aninverse-leveraged exchange-traded fund(ETF) that tracks the Nasdaq-100 Index.The Nasdaq 100 is composed of the largest companies, both domestic and international, listed o