伦铜小跌，投资者关注贸易谈判进展

Group 1 - London copper prices experienced a slight decline, with three-month copper down by $36 or 0.36% to $9,842 per ton, following a three-month high reached last Friday [3] - The Shanghai copper market saw the most active August contract drop by 120 yuan or 0.15% to 79,650 yuan per ton [5] - The financial markets were buoyed by the announcement from the Canadian government to cancel the digital services tax, aiming for a "mutually beneficial comprehensive trade arrangement" with the U.S. [5][6] Group 2 - The dollar's weakness provided support to the metal markets, keeping the dollar index near a three-year low [7] - A weaker dollar makes dollar-denominated commodities cheaper for overseas buyers, potentially increasing demand [8] - COMEX copper fell by 0.8% to $5.08 per pound, with the premium of COMEX over LME copper slightly decreasing to $1,365 per ton [9]