美国商品期货交易委员会（CFTC）：截至5月13日当周，COMEX铜期货投机性净多头头寸增加1,443手至24,780手。

Group 1 - The core point of the article is that the Commodity Futures Trading Commission (CFTC) reported an increase in speculative net long positions in COMEX copper futures, rising by 1,443 contracts to a total of 24,780 contracts as of the week ending May 13 [1]