Green Mountain Coffee Roasters Inc. […], maker of the single-serve Keurig brewing machine, fell to the lowest in seven months after hedge fund managing director Whitney Tilson said there may be potential for accounting fraud at the company. Green Mountain fell 10 percent to $58.19 at 1:07 p.m. in New York, after dropping to $56.19, the lowest intraday price since March 10. The shares lost 22 percent in the week before today after David Einhorn, the president of Greenlight Capital Inc., said the company has a “litany of accounting questions” and needs to improve its transparency. [Bloomberg, Earlier]