SYDNEY (Reuters) - Asian share markets bounced broadly on Monday as investors dared to hope for both progress at Sino-U.S. trade talks in Washington this week and more policy stimulus from major central banks. MSCI's broadest index of Asia-Pacific shares outside Japan rose 1 percent, recovering from a sharp fall last Friday. Japan's Nikkei climbed 1.8 percent to its highest level of the year so far, while Australia's main index rose 0.7 percent. Shanghai blue chips bounced 1.6 percent.But..