ABM Industries Incorporated (ABM) has had an impressive run in the past six months. The stock has gained 16%, outperforming the industry and the Zacks S&P 500 composite’s growth of 13% and 10%, respectively.Factors Driving the UptickABM’s diversified portfolio of services, including janitorial, engineering and facility services, has proven to be resilient during times of economic uncertainty. As businesses and institutions have heightened its focus on maintaining clean and safe environments, ABM has seen a ...