Look out below? Tech giants hit hardest by profit-taking Mon.:

$CRWD -9.0%
$SQ -6.3
$CRM -5.3
$ADBE -5.1
$SNAP -4.9
$TWTR -4.5
$NFLX -4.2
$NVDA -4.1
$AMD -4.1
$EA -3.9
$PYPL -3.9
$MSFT -3.1
$TSLA -3.1
$AMZN -3.0

Nasdaq -2.1%