It's not libel if it's true, but securities fraud laws go far beyond "don't lie". At least in the presence of a fiduciary relationship, offering true informati

It's not libel if it's true, but securities fraud laws go far beyond "don't lie". At least in the presence of a fiduciary relationship, offering true information can still be legally risky if it's done for the benefit of the broker instead of their client. Drose and Ackman are considerably safer because they're just making public statements, but there are quite a lot of ways to break the law around trading outside of actual libel.