Billionaire investor Elon Musk is under scrutiny from a major U.S. labor union after Tesla (TSLA) stock declined 30% this year. In an unusual

It comes as shares in Musk's Tesla business have slumped by 9% after EU and UK sales fell by almost half in January. Tesla sales fell more than 45% in the EU, EFTA, and the UK, despite European electric car sales trends, which grew by more than a third in January, according to trade body Acea.

For Musk, the world’s richest man and Tesla’s largest shareholder, those are just paper losses. He owns and runs several other companies — among them SpaceX, Twitter, and artificial intelligence startup xAI — so Tesla’s recent decline is just a flesh wound.

Stocks were falling on Thursday after strong quarterly earnings and solid guidance from Nvidia triggered a sell-off in the stock. All three of the major indexes were in the red on Thursday afternoon,

The buy the dip crowd failed to make an appearance Tuesday and the tech stocks they’ve been pumping up suffered the damage.

U.S. stocks erased early gains on Wednesday as investors awaited Nvidia’s highly anticipated earnings report. As the day ended in New York, the Nasdaq Composite and the S&P 500 were up 0.2% and 0.01%.