Bloomberg Opinion columnist Barry Ritholtz interviews industry legend Fern Mallis, who created the modern New York Fashion Week and helmed the influential Council of Fashion Designers of America (CFDA) for 10 years. She went on to be a senior vice president at IMG Fashion and later hosted a series of interviews with high-profile designers collected in the book "Fashion Lives: Fashion Icons With Fern Mallis." She is currently president of Fern Mallis LLC.