1) Chipotle loses its halo. Unlike its rather timid salsas, Chipotle Mexican Grill's stock has typically been red-hot, rising more than sevenfold between 2009 and the end of 2014. The burrito behemoth drove its rapid growth by successfully marketing itself as a rustic, farm-friendly alternative to faceless, soulless agribusiness. This year, however, the company's halo has plunged into the muck. Chipotle got caught in a seemingly endless chain of foodborne