SQQQ Short Interest Surges as Investors Hedge Against Tech Weakness Short interest in ProShares UltraPro Short QQQ (SQQQ) rose nearly 21% in March, with over 14 million shares now sold short. SQQQ, which gains value when the NASDAQ-100 falls, is trading well above its 52-week low, reflecting mounting investor caution amid ongoing tech sector volatility.56