and sometimes even derivatives of derivatives. To achieve the opposite of a specific asset, the fund managers have to trade in short positions and swaps, which essentially are bets the underlying security or investment performs poorly.

Read more: SQQQ: ProShares UltraPro Short QQQ ETF | Investopedia https://www.investopedia.com/articles/investing/122215/sqqq-proshares-ultrapro-short-qqq-etf.asp#ixzz57JN9DKvS 
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