Tesla bonds, shares plunge as investors worry about more competition, Elon Musk's behavior Tesla bonds, shares plunge as investors worry about more competition, Elon Musk's behavior September 5, 2018 dzadmin Comments 0 Comment Tesla’s stock and bond prices dropped after CEO Elon Musk renewed an attack on a British caver whom he previously insulted and a day after Mercedes unveiled more EV competition for Tesla.