Musk spoke at a conference and alluded that Optimus could be a $200 trillion business someday. That's multiples larger than the $10 trillion he suggested more rec

In many ways, these have been tough days for Tesla. Falling sales. Squeezed profit margins. Proposed changes in US government policy that could cost the company billions.

Tesla Chief Executive Elon Musk's brother, Kimbal Musk, who is a Tesla board member, sold 27 million worth of Tesla stock on Thursday, according to regulatory filings. Kimbal Musk sold 75,000 TSLA shares for an estimated $27.

Though Tesla’s shares have doubled over the past 12 months, they’ve had a tough run since the inauguration. Investors are waiting to see if Musk can keep the company’s charmed run going.