For some reason I got a notification from yahoo finance (via Reuters) that Tesla ousted Klaus Grohman. It's been a month since Mr. Grohman left the company. When I checked the SP, it was back in the red.
Mark Spiegel's twitter account links to this Times of India article about Grohman's departure. Here's a quote:
"I definitely did not depart because I had lost interest in working," Grohmann said, without elaborating.
The article suggests that when Musk told Grohmann that existing customers would be dropped and the firm would concentrate on Tesla, that is when Grohmann decided to leave.