Asia shares tread lightly, await China policy meeting

TOKYO/WASHINGTON (Reuters) - Asian shares and Wall Street futures stepped back on Thursday as resurgent concerns about the long-term impact of the coronavirus outbreak offset some of this week's earlier enthusiasm about economies re-opening.Investors were also looking ahead to a key policy gathering in China that may yield more economic stimulus, while recent data from around the world reinforced views that a sustainable recovery may not come for several months.MSCI's broadest index of..