https://phys.org/news/2018-08-tesla-ceo-musk-taunts-short.html

Shorting a stock can temporarily lower its price, making short investors a frequent target of CEO wrath.

The Twitter comments could potentially affect Musk's legal situation. On Tuesday he tweeted that he had secured funding to buy all Tesla shares and take the company private. The Securities and Exchange Commission is investigating Musk's disclosure of the potential deal, according to reports earlier this week.