Herbalife Drops After Activist Investor Bill Ackman Says He's Shorting Stock


William 'Bill' Ackman, founder and chief executive officer of... News PhotoBill Ackman,CEO,Finance,Financial Occupation,Founder,Healthy Eating,Horizontal,Investment,Merchandise,New York City,North,North America,Talking,The Americas,The Media,USAPhotographer Collection: Bloomberg 2012 BloombergWilliam 'Bill' Ackman, founder and chief executive officer of Pershing Square Capital Management LP, speaks during a presentation in New York, U.S., on Thursday, Dec. 20, 2012. Herbalife Ltd., the maker of namesake nutritional and weight-loss supplements, fell for the second day after Ackman said he has taken a short position on the company. Photographer: Scott Eells/Bloomberg via Getty Images