Report Summary Core View - Recent COMEX copper prices have fallen significantly by nearly 20% due to the implementation of US copper tariffs, and the spread between COMEX and LME copper has narrowed from nearly $3000 to less than $1000. The exclusion of refined copper from tariffs may lead to an increase in US refined copper imports and a return of copper processing enterprises to the US [2]. - From the supply - demand side, copper mine supply remains tight, processing fees are at a low level, and demand is weak in the off - season with copper rod开工率 falling and terminal consumption dropping. Copper inventory has accumulated again, and refined copper supply - demand has weakened [3]. - Looking ahead, COMEX copper has fallen, and the C - L spread is approaching the historical average. Conditional spot investors can conduct short - selling arbitrage operations on COMEX copper, and pay attention to the long - LME and short - SHFE copper cross - market arbitrage [4]. Latest Dynamic and Reasons - The US will impose a 50% tariff on imported semi - finished copper products and copper - intensive derivatives starting from August 1, but refined copper is excluded, which is different from market expectations. This may lead to an increase in US refined copper imports and a return of copper processing enterprises to the US [2]. Fundamental Situation - Supply side: Copper mine supply is tight, processing fees are at a low level, and the production guidance of some copper mines has been lowered, increasing the production risk of smelters [3]. - Demand side: In the off - season, copper rod开工率 has declined, terminal consumption such as household appliances has decreased, and copper inventory has accumulated again, and refined copper supply - demand has weakened [3]. - Other factors: The Fed maintained the benchmark interest rate in July, the expectation of a September rate cut has decreased, and investors are becoming more cautious as the expiration date of the reciprocal tariff approaches [3]. Summary and Strategy - Spot investors with conditions can conduct short - selling arbitrage operations on COMEX copper according to their own situations [4]. - Pay attention to the long - LME and short - SHFE copper cross - market arbitrage due to the relatively high SHFE/LME ratio and positive import profit [4].