SEC will halt trading on stocks because of social media influence.

SEC Suspends Trading in Multiple Issuers Based on Social Media and Trading Activity

"The SEC's recent suspensions of trading in nearly two dozen securities – including 15 today – are one facet of our ongoing efforts to police the market and protect investors," said Melissa Hodgman, Acting Director of the SEC's Division of Enforcement. "We proactively monitor for suspicious trading activity tied to stock promotions on social media, and act quickly to stop that trading when appropriate to safeguard the public interest.
[link to www.sec.gov (secure)]

Almost like a real Big Brother, always watching out for us!