2012年9月铜价先扬后抑美联储推出QE3、欧洲央行无限量购债计划以及中国1500亿美元基建计划等一系列政策措施引发的乐观情绪成为9月中上旬铜价上涨的主要动力。LME现货价从月初的7600美元/吨上涨至9月14日的8400美元/吨。然而,随着利好消息的效用递减,美国、欧洲及中国制造业数据不及预期,9月下旬铜价小幅震荡下跌,至9月24日跌至8100美元/吨。 In September 2012, optimism that a series of policy measures such as the introduction of QE3 by the Federal Reserve with the launch of the Fed, the ECB’s unlimited debt purchase program and China’s $ 150 billion capital construction plan, became the major driving force of the copper price rise in mid-September. LME spot price from the beginning of the month of 7600 US dollars / ton up to September 14 of 8400 US dollars / ton. However, with the decline of positive news, manufacturing data in the United States, Europe and China fell short of expectations. In late September, the price of copper dropped slightly and dropped to $ 8,100 / t on September 24.