铜价周线有望收高，长期需求前景不确定抑制涨幅

Group 1 - Copper prices declined on May 16, but are expected to rise this week, with long-term demand uncertainty limiting further increases [2] - The LME benchmark copper contract fell by $81.5 or 0.85% to $9,495.5 per ton [3] - The most actively traded June copper contract on the Shanghai Futures Exchange closed down 250 yuan or 0.32% at 78,140 yuan per ton [4] Group 2 - This week, LME copper rose approximately 1%, while Shanghai copper prices increased about 0.6% [5] - A metal analyst noted that traders are pleased with the US-China trade decisions, but uncertainty remains about future developments after 90 days [6] - Analysts expect Shanghai copper to hover around 78,000-79,000 yuan per ton in the short term, reflecting mixed market sentiment [7] Group 3 - Copper inventories at Shanghai Futures Exchange warehouses surged 34% this week to 108,142 tons [8] - The rapid increase in copper inventory may exert short-term pressure on copper prices, according to traders [9] - Other LME metals also experienced declines, with three-month aluminum down 0.8%, zinc down 1.1%, lead down 1.1%, and tin down 0.5% [9]