Group 1 - The core viewpoint is that U.S. copper mining stocks have experienced significant declines following President Trump's decision to exclude refined copper from tariffs [1] - The U.S. Copper Index ETF fell by 19.31%, indicating a sharp downturn in the market [1] - Copper mining ETFs also saw a decline of 2.9%, reflecting broader industry challenges [1] Group 2 - Freeport-McMoRan's stock dropped by 9.46%, with a cumulative decline of 13% over the last five trading days [1] - Hudbay Minerals experienced a 7% decrease in stock value [1] - Southern Copper Corporation's shares fell by 6.33%, contributing to the overall negative sentiment in the sector [1]