Topic · Core Finance & Asset Classes
← All topicsRegulation & Compliance
30 articles · 4 checkpoints · 19 deeper reads · 7 reference notes
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Market abuse is a broader legal category than most people assume, it covers not just insider trading but manipulation, unlawful disclosure and attempted abuse, and it can be committed without ever placing a trade at all.
US insider trading law does not ban trading on secrets in general, it bans trading on secrets while breaching a duty of trust, a distinction called the classical theory that explains some famously surprising outcomes, including cases where trading on real inside information was found to be perfectly legal.
A trade surveillance system's real engineering challenge isn't detecting suspicious patterns, it's tuning the alert thresholds so compliance staff drown in neither false positives nor missed cases, a balance every desk gets wrong in one direction before they get it right.
Material non-public information is not defined by a fixed list of topics, it's defined by a test of whether a reasonable investor would consider it important to a trading decision, which is a deliberately fuzzy standard that shifts case by case.
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