Tesla Exec Sells Stock; Musk Warns Short Sellers of 'Obliteration'

Tom Zhu, a top executive at Tesla, sold most of his stock in the company.

This made some people wonder if he still believes in Tesla.

Elon Musk, Tesla's boss, then told people betting against Tesla's stock that they could lose a lot of money when the company achieves autonomy.

Some investors bet against a stock, hoping its price will go down.

If the price falls, they make money; if it goes up, they lose.

Musk has previously disagreed with investors betting against Tesla.