I would use the pullback to add QQQ gradually, rather than trim broadly. Monday’s weakness was concentrated in tech and semiconductors, while the Dow actually gained, suggesting rotation rather than a full risk-off break. 

The catch is timing. Nvidia reports Wednesday and remains a major sentiment test for the entire AI complex, while Warsh’s Jackson Hole debut comes Friday amid unusually high sensitivity to long-end Treasury yields. That makes an all-in QQQ purchase before Wednesday unnecessarily binary.

My approach: add perhaps one-third now, keep another third for a post-Nvidia sell-off, and the remainder until after Jackson Hole. I would not sell Meta or Alphabet simply to avoid this week’s volatility. If Nvidia delivers strong guidance and long yields stabilise, QQQ could rebound quickly. If either disappoints, keeping cash gives you ammunition at better prices.

So between the two choices: **add QQQ on weakness, but stagger the entry.**