Telsa (NASDAQ:TSLA) this week reported a dismal quarterly performance, but investors still rewarded the stock after top boss Elon Musk promised to return his focus to the company from his government advisory role and said the firm's robotaxi and artificial intelligence ambitions remained on track.

Musk’s management style has always been a lightning rod. His focus on speed and impatience allows him to advance technologies at a breakneck pace.

A sobering quarterly report puts more prssure on Tesla’s chief executive to make good on his promises for fully autonomous vehicles.