The author has initiated a tactical short position using SQQQ (ProShares UltraPro Short QQQ), purchasing shares at $43.13 to make up 21.10% of their portfolio. The trade anticipates a 10% to 15% market pullback, which the author estimates could drive SQQQ up by 20% to 30%. The position is intended to be closed if market sentiment reaches an extreme "Markets in Turmoil" level.