[filoleg]

That's why companies like Apple have very strongly enforced rules related to this for their employees, like blackout windows on trading AAPL shares and not allowing them trading AAPL shares at all. And there are even more restrictions for those working on certain teams and in certain areas (e.g., finance/accounting). Buying/selling right before the big announcement or earnings reports is straight up not allowed.

I don't know the actual dates for Apple (as I only have friends working there, I haven't worked there myself, and I didn't quite care to ask for the exact length of trading blackout windows). But I know for a fact myself that at Google you get a trading blackout window that starts around 3-4 weeks before the quarterly earnings announcements and ends around a week or so after. And you are not allowed to trade GOOG options at all while an emlpoyee, not even outside of those trading blackout windows. There are additional blackout windows as well, but that's beside the point, and I don't remember them off the top of my head. And that's just for a run-off-the-mill software engineer working on an internal infra product that isn't some super-top-secret thing.