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by nojito 1760 days ago
The trading information is essentially public.

It’s just a matter of finding suspicious trades to start an investigation.
1 comments
TuringNYC 1760 days ago
Trading information is public (quotes and trades) but the originating person/entity is not, so it would be hard to detect this via the public trade log or quote book since you couldnt see track records or profitability.

That said, the SEC does have access to the full dataset including the person/entity making the trades.

link
nojito 1760 days ago
SEC/FINRA only gets access to blue sheet data. They don’t have direct “real time” access to all trading data.

This is why their data analytical skills are so impressive.

link