Imo what we’re seeing here is the “winner take all” effect that in technology is almost inevitable. But $QQQ is a very well constructed index: yesterday $AAPL was flat, $MSFT was flat, $AMZN was down -1.4%, $GOOGL was flat, and $FB was down -1.3%; nonetheless $QQQ was up +0.8%. https://t.co/yemNKI9Z2y