Before someone is quick to say "how can you not know?!," there are some pretty ambiguous cases around trading on material, non-public information.
- Counting cars in parking lots as a proxy for sales.
- Your employer sees a drop in sales and is able to directly attribute it to a competitor. Can you buy shares in the competitor?
- You're at a bar in NYC and a drunk i-banker is trying to impress a girl and runs his mouth and talks about a pending acquisition.