$QQQ up 1.3% after hours, but of that gain, nearly all is accounted for by these 3 stocks:
$AMZN +7.1% (9.87% of index)
$MSFT +3.5% (9.86% of index)
$INTC +5.5% (3.31% of index)
This means that rest of index will basically be flat if $QQQ opens at this price tomorrow.