Copper futures traded on Shanghai Futures Exchange lower on overnight losses in LME 3-month, weak sentiment spilling over from sharp decline in China shares amid concerns over further tightening measures; "short-selling is likely to pressure prices further during the session," says Yong'an Futures analyst Hu Bin. Adds copper will probably continue rangebound trade for some time. Benchmark May contract at CNY57,690/ton, down CNY880, or 1.5%. LME 3-month at $6,170/ton, down $50 from PM kerb.