The stock has been on a roller coaster ever since Mr. Trump’s election. The shares are down about 13 percent this week.

Musk has called to “kill” Trump’s policy bill, criticizing the legislation as “massive, outrageous” and “pork-filled.”

Trump on Thursday said he was “very disappointed” in Musk — who served briefly as the head of Trump’s new Department of Government Efficiency, or DOGE — and wondered aloud whether…