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A comment on SEC charges Netflix insider trading ring. Parent comment

Re:SEC charges Netflix insider trading ring by throwaway2037 on Thursday August 19, 2021 @05:39AM (#28231944)
In practice, there is no way to reliably know why a stock is changing price. There is lots of insider trading that is so small it does not materially impact the trading prices. As of date, there is no scientifically reliable way to measure "market impact" real-time. I assume the best HFT funds are trying to do this using AI/ML.
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Re:SEC charges Netflix insider trading ring by vmception on Thursday August 19, 2021 @10:43AM (#28234424)
Right, and that’s not a factor in insider trading charges.

If a firm - that also has an agnostic active trading strategy - gets any inside info they have to cut the active trading strategy for liability reasons. That’s a conclusion some firms have made, not whether the SEC will actually bother them in a quantum reality or whether they can successfully defend it.

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