Global manufacturing activity was in a stagnation rut in May with factory output from Asia, Europe and the Americas barely improving, surveys published Wednesday showed. The Organisation for Economic Cooperation and Development (OECD) also issued a gloomy report Wednesday, which said that the global economy is stuck in a low-growth trap that will require more coordinated and comprehensive use of fiscal, monetary and structural policies to move to a higher growth path and ensure that promises are kept to both young and old.