Financial ministers from the Group of Seven leading economies are to hold a teleconference Monday to discuss world market stability. Japanese media say deputy finance ministers agreed Sunday on a conference call among the higher-level ministers. Kyodo News agency reported it would likely be held before Asian markets open Monday morning, but the timing wasn't more specific. The leaders from Britain, Canada, France, Germany, Italy, the U.S. and Japan are also expected to discuss the eurozone sovereign debt concerns. Standard & Poor rating agency announced late Friday it would strip the U.S. of its sterling AAA credit rating for the first time and move it down one notch, to AA+.