Tesla tumbles on new executive departures, Musk interview

Shares of Tesla Motors tumbled Friday as investors were rattled by the departures of two executives and a late-night interview in which chief executive Elon Musk was seen smoking marijuana.Tesla shares sank 6.3 to close at $263.24 after the latest events that heightened concerns over Musk's erratic management style at the electric carmaker."Elon's actions are making it harder and harder to support Tesla as a company," said analyst Gene Munster of Loup Ventures.