Feb 16, 2009. /Lesprom Network/. Standard & Poor´s has affirmed Metso’s BBB long-term credit rating and changed the outlook from stable to negative. At the same time the short-term corporate credit rating was lowered to A-3 from A-2. Metso is a global supplier of sustainable technology and services for mining, construction, power generation, automation, recycling and the pulp and paper industries.