Dow Jones Plunges 500 Points, As Apple Dives On Earnings; Tesla Skids, While Twitter Crashes 20% On Earnings

Dow Jones Plunges 500 Points, As Apple Dives On Earnings; Tesla Skids, While Twitter Crashes 20% On Earnings

The Dow Jones Industrial Average tumbled 400 points, as Apple dived 5% on weak China sales. Twitter plunged 20% on disappointing user growth.