Activity in China’s colossal factory sector shrank in October as global demand stuttered, reinforcing the case for more stimulus and questioning whether the Federal Reserve can be confident enough to raise U.S. interest rates this year. Only Japan showed any hint of growth, perhaps thanks to the persistent weakness of the yen. The run of pedestrian results will focus attention on the U.S. Institute for Supply Management (ISM) measure of manufacturing due later Monday which is forecast to have flatlined in October.