Mumbai, Dec. 31 -- Copper futures slipped today as last session of the year triggered some profit selling after a sharp surge in last session. The commodity soared around 4% in last session metals rallied amid weak US dollar index. Overall mood is positive for the red metal after the recent drawdown in LME Copper inventories pulled the storage levels in the exchange to lowest in around two months. Chinese economic cues are mildly supportive as headline seasonally adjusted Purchasing Managers' Index (PMI) rose above the 50.0 no-change mark in December. At 50.1, up from 49.9 in November, the latest reading indicated a fractional expansion of the Chinese manufacturing sector. This also marked the fourth improvement in the health of the sector ...