Late last year, Ackman, who runs $12 billion Pershing Square Capital Management, publicly declared that he's shorting $1 billion worth of Herbalife stock.
Ackman believes that the company is a "pyramid scheme" that targets lower income individuals. As a result, he thinks regulators, specifically the Federal Trade Commission, will be persuaded to investigate it and shut it down.
His rival, Carl Icahn, purchased a massive stake in the company and said that he thinks Ackman will be the victim of the "mother of all short squeezes."
Herbalife is a multi-level marketing firm that sells nutritional products such as weight loss shakes and vitamins. We decided to try Herbalife's Formula 1 shake, the company's best selling product.
Watch the
Produced by William Wei