Elon Musk's status as the world's wealthiest person is in no danger of changing. But since mid-December, the tech titan's net worth has declined by more than $100 billion, or approximately 25%, as a sell-off in shares of Tesla,

Tesla sales in Europe dropped by 45% in January in an EV market that went up 37%, with the Model Y switchover and Musk's controversial persona among key causes

Sales are plunging in some of the world’s biggest EV markets, and protesters and vandals are targeting the company’s stores.

For someone who wears many hats, including—but not limited to—being the CEO of Tesla TSLA and SpaceX and the owner of social media platform X (formerly known as Twitter), the world's richest man, Elon Musk has a lot of time on his hands.

Tesla stock was—very—weak again Tuesday as investors digested early-year sales data, trying to determine whether a drop was due to random fluctuations or a more serious problem, such as whether CEO Elon Musk’s political activities are turning off customers.

Tesla Inc.’s sales plunged 45% last month across Europe, where rival carmakers saw a surge in electric-vehicle demand.