The US Dollar Index surged to a 13-month high, copper prices fell below $6.3 per pound to a more than three-month low, and the copper mining sector was directly suppressed. $Freeport Mcmoran(FCX.US) fell by seven points, a relatively solid drop; $JIANGXI COPPER(00358.HK) and $CMOC(03993.HK) on the Hong Kong stock side also fell by three to four points, following copper prices and the strong dollar. The logic is straightforward — copper pricing is based on global demand and the US dollar. When both turn bearish, the profit elasticity of mining companies reacts first. Whether copper prices can stabilize above $6 in the short term is key to whether they can stop falling.