SQQQ is a 3x leveraged inverse ETF that seeks to deliver three times the opposite of the Nasdaq-100's daily return. If QQQ falls 2% in a day, SQQQ targets a 6% gain. This sounds useful as a hedge or bear market vehicle, but the daily resetting compounding mechanic makes SQQQ one of the most destructive long-term holdings available — it is mathematically designed to lose value over time in any market that is not consistently trending downward. Volatility decay compounds dramatically at 3x leverage: on days QQQ rises 2%, SQQQ loses 6%; on subsequent days QQQ falls 2%, SQQQ gains approximately 5.9% — the asymmetry means that volatile sideways markets produce accelerating losses. Over periods longer than a few trading days, SQQQ's returns can diverge dramatically from the implied 3x inverse of the cumulative index movement, almost always to the detriment of the holder. SQQQ is appropriate only as a very short-term intraday or multi-day tactical instrument for sophisticated traders with a specific directional view on the Nasdaq-100 over a defined brief time horizon. For investors seeking protection against Nasdaq-100 declines over weeks or months, put options or a smaller position in PSQ are structurally more appropriate instruments.