Stocks plunged on Friday, hurt by a negative reaction to the latest round of tech earnings, with Amazon posting its biggest single-day loss in more than 15 years. The Nasdaq led the decline, falling 4.2% and recording its worst monthly performance since the Financial Crisis. Even amid a wash of red for the overall markets, Accolade (ACCD) represented a standout decliner. The stock lost about half its value on earnings news. A disappointing quarterly report also sparked selling in VeriSign (NASDAQ:VRSN). The stock posted a double-digit percentage decline and set a new low. While most of Wall Street endured selling...