Getting rich trading your competitors' stock?

Yep, that's how it works, these days.

The Medpace executive is among dozens of top executives who have traded shares of either competitors or other companies with close connections to their own. A Gulf of Mexico oil executive invested in one partner company the day before it announced good news about some of its wells. A paper-industry executive made a 37% return in less than a week by buying shares of a competitor just before it was acquired by another company. And a toy magnate traded hundreds of millions of dollars in stock and options of his main rival, conducting transactions on at least 295 days. He made an 11% return over a recent five-year period, even as the rival’s shares fell by 57%.

These transactions are captured in a vast IRS dataset of stock trades made by the country’s wealthiest people, part of a trove of tax data leaked to ProPublica. ProPublica analyzed millions of those trades, isolated those by corporate executives trading in companies related to their own, then identified transactions that were anomalous — either because of the size of the bets or because individuals were trading a particular stock for the first time or using high-risk, high-return options for the first time.

The records give no indication as to why executives made particular trades or what information they possessed; they may have simply been relying on years of broad industry knowledge to make astute bets at fortuitous moments. Still, the records show many instances where the executives bought and sold with exquisite timing. - ProPublica