The fast-casual pioneer might be on investors' radars today. With its innovation in the restaurant industry, creating and scaling the fast-casual concept, Chipotle Mexican Grill's (CMG 2.23%) success can't be overlooked. Its growth has been spectacular, despite macro headwinds causing weakness this year. And shares have more than doubled in the past five years, a great outcome for investors. Chipotle has had a challenging year thus far, as it reported 0.4% and 4% drops in same-store sales in Q1 and Q2, resp ...