Tesla CEO Elon Musk is at it again on Twitter, this time with a comment he made about the electric car company’s stock price being too high.

On Friday, Musk tweeted: “Tesla stock price is too high [in my opinion].” Opinion or not, Tesla’s stock price plummeted following the tweet, which came a minute after Musk said he would sell almost all his physical possessions and own no house in a separate tweet.

Jaclyn Jaeger is a freelance contributor to Compliance Week after working for the company for 15 years. She writes on a wide variety of topics, including ethics and compliance, risk management, legal,...