Beyond Meat, the El Segundo pioneer of plant-based hamburger patties, saw its stock collapse this week after it finalized a deal to reduce its debt. Above, a Beyond Meat burger prepared at the company's research center and test kitchen. (Carolyn Cole / Los Angeles Times) What does it cost a company when it's no longer in the zeitgeist? For stockholders in Beyond Meat, perhaps as much as 99% of their money, if they bought at the top of the market. Shares of the El Segundo maker of plant-based meats, an in ...