The Insider Trading That's Legal—and Most People Ignore
The insider trading you're allowed to do

Insider trading is illegal because it works too well. But employees hold a legal version: early knowledge about their company's decline or growth. The essay uses Nokia's engineers—who saw the iPhone threat years before the market did—to show how acting on that information (retraining, moving to growing teams) beats waiting for public confirmation. It explains why we hesitate and offers practical ways to 'trade' on your inside view.
Insider trading is illegal in the stock market for a simple reason: it works too well.