The brother of Tesla CEO Elon Musk has been selling Tesla stock. Kimbal Musk has been offloading shares in recent months, just as Tesla stock has made a massive retreat from all-time highs that put the stock, however briefly, among the select group of trillion-dollar companies.

This suggests that a reaction from consumers who dislike Mr Musk’s antics are only one reason for falling sales. An updated Model Y, Tesla’s best-selling vehicle, has just gone on sale. In preparation Tesla ran down inventory of the old model, crimping supply. Customers doubtless held off purchases until the new car was available.

The federal cost cutting measures undertaken by Musk have spurred "Tesla Takedown" protests with dealerships being vandalized across the nation.

Explore the main reason why the Tesla stock price is crashing, and what to expect in the coming months after Trump's intervention