SINGAPORE (Reuters) -Global stocks surged on Friday as signs of possible trade talks between the U.S. and China lifted risk sentiment after lacklustre earning results from tech bellwethers Apple and Amazon fuelled worries about the impact of a global trade war. China's commerce ministry said on Friday the United States has repeatedly expressed its willingness to negotiate on tariffs and that Beijing's door is open for talks, in a move that could ease trade tensions that have roiled global markets. The comments helped U.S. stock futures reverse course from earlier falls after Apple trimmed its share buyback program and warned tariffs could add about $900 million in costs this quarter.