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by belter 1651 days ago
Its not unclear. Sometimes difficult to enforce but borders are easy to define:

"In 1984, the Supreme Court of the United States ruled in the case of Dirks v. Securities and Exchange Commission[25] that tippees (receivers of second-hand information) are liable if they had reason to believe that the tipper had breached a fiduciary duty in disclosing confidential information. "

"Insider trading" https://en.wikipedia.org/wiki/Insider_trading