Fears of further declines on Wall Street kept Asian shares mostly on the defensive on Monday, with concerns over geopolitical tensions eclipsing U.S. data that argued against an earlier start to the Federal Reserve’s rate-tightening cycle. MSCI’s broadest index of Asia-Pacific shares outside Japan managed to gain 0.4 percent, largely as Chinese shares continued to rally on signs that economy was regaining momentum after a spate of stimulus measures.