Herbalife's shares dropped 11% off the announcement of Pershing Square's founder Bill Ackman, that he will be delivering a presentation tomorrow that will show the company is a massive fraud. Ackman said the presentation will be on "Halftime Report" with Scott Wapner, and said it would be the most important of his career. Ackman claims that he has enough evidence to show that Herbalife will eventually fail. In December 2012, Ackman published a 300 page report he says proved that Herbalife was a pyramid scheme. Since then the stock has rose 33%, mainly because Carl Icahn took a massive long position on the stock. Ackman's presentation will begin at 10 a.m.