It’s been a big year for the nutrition supplement stock, but it’s time for more modest expectations. : Shares of Herbalife (NYSE: HLF) have raced 70% higher this year, smashing the broader stock market's 8% decline as of this writing. Hedge fund manager Bill Ackman said he exited his bet against Herbalife early in 2018; paired with rebounding sales and share repurchases, investors who believed in the nutritional supplements company should be quite pleased. Ackman bet against Herbalife years ago because, as he said at the time, the company was a "pyramid scheme" whose stock would "go to zero."