Hedge fund titan Bill Ackman is on a crusade to expose global nutritional giant Herbalife as the largest pyramid scheme in history, while Herbalife executives claim Ackman is a market manipulator out to bankrupt them.

Hedge fund titan Bill Ackman is on a crusade to expose global nutritional giant Herbalife as the largest pyramid scheme in history, while Herbalife executives claim Ackman is a market manipulator out to bankrupt them.