Apple Plunges $57 Billion in Premarket Trading, Dragging Global Stocks After Shock Sales Warning Posted byWill Martin January 3, 2019 Leave a comment on Apple Plunges $57 Billion in Premarket Trading, Dragging Global Stocks After Shock Sales Warning Global stocks slid after a shock revenue-guidance downgrade from Apple and troubling comments about the economic impact of the U.S.-China trade war from CEO Tim Cook.