Elon Musk reigniting his feud with the president is "stupid," longtime Tesla investor Ross Gerber said.

The electric-vehicle maker has an aging lineup and slumping sales, but its CEO has shifted his focus to robotaxis and robots.

The company has devoted resources to autonomous driving rather than developing new models to attract car buyers.

The S&P 500 isn’t climbing like it should be, and three major companies are dragging it down hard. Apple, Google’s Alphabet, ...