https://www.cnet.com/roadshow/news/elon-musk-sued-sec-tesla-false-misleading-statements/

That's all it took to launch an investigation (or two). Musk's tweet on Aug. 7 claimed that he wanted to take Tesla private once again at a price of $420 per share, and he claimed he had secured the funding to do so.

Why did he want to do that? In an email to employees, which was later posted on Tesla's blog, the CEO said that "wild swings" in the stock price can "be a major distraction for everyone working at Tesla." Going private would eliminate concerns about share prices, and perhaps more importantly, it would stick it to the "shorts," investors who bet against Tesla's future success for profit. This would free the company from its quarterly shackles and allow it to focus purely on long-term thinking, which might come at the expense of short-term balance sheets.