A decade ago, Nvidia was the 387th-biggest stock in the market. Before it became the world’s most valuable company, some of the biggest active managers were buying it on the way up. In the movie Wall Street, Gordon Gekko had a code phrase for that kind of valuable tip: “Blue Horseshoe likes Anacott Steel.” Insider trading is illegal, of course. But the rise of active ETFs has created a perfectly legal way to peek at what some of the world’s biggest stock pickers are buying — every single day.

On this episode of Trillions, Eric Balchunas and Joel Weber explore “Blue Horseshoe,” a new Bloomberg Intelligence tool designed to track what “Big Active” is buying and selling. Bloomberg Intelligence’s Sharoon Francis and David Cohne join to explain how the daily transparency of active ETFs made the tool possible, how it can surface stocks while managers are still building their positions, and what names are attracting attention now. Blue Horseshoe likes Okta, anyone?