Throughout the 7 days of Pullback that started on 2nd Oct, QQQ drops more than SPY. This is a given. A normal state of affair most of the time. Especially this pullback where the theme being a rotation from growth (read QQQ) to value (read SPY) stocks. So for the first 7 days, QQQ has declined a total of 8.8% while SPY only dropped 5.3%. But on the 8th Day, QQQ declined only about half as much