Should investors be able to sue a company anytime its stock goes down?
Investors should be able to win a lawsuit if they can prove that company did not immediately disclsee important information, falsified information or that some owners were privy to insider information when they traded (Zuk sold his shares in suspicious time).
It's more interesting than that:
> Zuckerberg has sold more Facebook stock in the last 3 months than any insider at any other company
Given that there were indications that he knew well before today, there may be a case.
https://www.cnbc.com/2018/03/20/zuckerbergs-facebook-stock-s...
>Zuckerberg's sales accounted for the most, by far. He announced plans in September to sell 35 million to 75 million shares over the next 18 months to fund philanthropic efforts.
It's not new and was announced in September 2017.
From the same article:
>CEO Mark Zuckerberg sold 1.14 million shares as part of regularly scheduled programs.