Retired finance professional. I can't see the future and neither can you; anyone who says different has something to sell. NOTHING I SAY IS INVESTMENT ADVICE.
QQQ was down -6% yesterday for the first time in 200+ trading days.
I thought you'd not only like to see how QQQ did the day after such events ("Return That Day" below), but also how it did the NEXT day (which would be Monday in the current scenario).
[2020 below is COVID.]