Tech split: $FB, $TWTR dive on ad boycott fears. Chips + software hold up best. Fri:

$FB -8.3%
$TWTR -7.4
$SNAP -5.8
$GOOGL -5.4
$AAPL -3.1
$CRM -2.8
$ADBE -2.3
$AMZN -2.2
$MSFT -2.0
$ON -2.0
$INTC -1.7
$TXN -1.4
$MU -1.4
$QCOM -1.1
$INTU -0.8
$AVGO -0.5
$NOW -0.4

Nasdaq -2.6%