Shares of mega-cap tech leaders tumbled Wednesday afternoon after a surprise announcement of auto tariffs from the White House.

My companies are suffering because I’m in the government. Do you think it helps sales if, you know, dealerships are being fire bombed? Of course, not.”

Tesla’s stock closed higher Tuesday for the fifth straight day, a remarkable and sustained rally that has recaptured a quarter of the value it lost in the last three months. It may not last.

Tesla shares fell more than 5% on Wednesday, ending the EV maker's blistering rebound out of a prolonged slump.

Global protests against Tesla and Elon Musk on March 29 challenge brand image ahead of Q1 delivery dip; explore its impact on TSLA stocks and the EV market.

Tesla stock has plummeted in a matter of months. Our writer considers some different approaches to valuation -- and explains his own plan.