As a result of overdiversification, their (active managers) returns get watered down. Diversification covers up ignorance. Active managers haven't done enough research into any of their companies. If managers have 200 positions, do you think they know what's going on at any one of those companies at this moment?
Bill AckmanIf you think of the typical Herbalife distributor and their level of sophistication, to this day I still don't understand the marketing plan - true story.
Bill Ackman